Method and device for transferring image onto wooden base using laser beam

FIELD: physics, optics.

SUBSTANCE: device for transferring an image onto a wooden base has apparatus for receiving and/or creating an image. At least one source of a laser beam. Apparatus for moving the laser beam with rotation and/or translational movement of the laser beam relative the said wooden base or vice versa - for moving the wooden base relative the laser beam, as well as for focusing the laser beam onto the said base. At least one module for regulating radiation power of the laser beam. At least one module for controlling the said movement and focusing apparatus. Apparatus for converting information of the said image into an instruction for the said at least one regulation module and the said at least one control module. The said at least one regulation module regulates radiation power of the laser beam by directly changing pumping of the active substance and/or changing operation of the modulator located in the resonator of the source of the laser beam.

EFFECT: solution enables reproduction of images on a wooden base with an irregular shape with high accuracy and speed of processing, as well as high depth of transfer within the base.

22 cl, 2 dwg

 

The technical field to which the invention relates.

The present invention relates to a device and method for image transfer on wood base managed by a laser beam.

The level of technology

The use of a laser beam for applying marks, cutting or playback images on any ground such as paper, plastic, metal or wood known. The most suitable wavelength of the laser beam can be set to any material, which is processed substrates, that is, can be installed in the most suitable type of laser for material constituting that ground, as well as the radiation power and the pulse frequency of the laser beam, which allow you to cut and reproduce the desired pattern. Tables and interdependence, linking wavelength laser type (i.e. the type of the active substance, the type of pump for this purpose the active substance and the relative operating conditions), the radiation power and the pulse frequency, and the base material to be processed with a laser beam, can be found in the technical literature related to this field of technology.

In particular, the well-known image transfer on wood base, such as the frame of a mirror or closet door, which is preferably performed using a laser with active substances is involved in a gaseous state, such as CO2lasers, or the active substance in the solid state, such as ionic crystals such as ruby or neodymium.

The image in digital format at the beginning can be converted into a set of work instructions to control the laser source and can then be transferred to the wooden base by modulation of the power and frequency of the pulses emitted by a laser beam, on the basis of these operating instructions.

A simplified diagram of a method of image transfer on wood base, from the receipt or creation of digital images through a system called "Computer laser system, briefly described in the publication US-A1-2005/0006357.

In this publication does not mention the type of laser that can be used for such image transfer, no working modes for adjusting the laser beam in relation to the radiation power and pulse frequency, and movement and focus its relatively wooden base, or Vice versa.

In addition, in patent application U.S. US-A1-2005/0006357 not mentioned transferring images, reproducing the texture of the wood, on wooden base.

In U.S. patent US 4847184, issued in the name Taniguchi, describes how to use the source on the basis of CO2laser connected to the acoustic-optical or electro-optical) modulator, preferably on the Snov, Germany (or Cd-Te), which is located after the source of the laser beam, resulting in the latest modulate on wooden base, preferably pre-treated by agents that accelerate the carbonization and/or discoloration.

In more detail, in the method described in patent US 4847184, there is the step of obtaining one or more images in shades of gray, pre-treatment of the wooden base using these additives, the formation of the laser beam and modulate it using the specified acoustic-optical or electro-optical modulator, which is installed outside from the laser source, and then the direction of the laser beam on the wooden basis in accordance with image information of a previously created image.

When using the known modulator, which is installed outside from the laser source, there is a certain difficulty with modulation of the beam and thus it is impossible to use high power radiation due to the type of modulator (based on Ge or Cd-Te), which should be used in the device of this type. This means that the device described in US 4847184, and the corresponding method of its use do not allow to provide high accuracy when reproducing an image on a wooden base, and they do not allow to obtain a high is th processing speed and/or depth of cut of the latter. Furthermore, in U.S. patent 4847184 does not envisage the use of the transmission system of the beam, which focus and move the latter on a wooden base, which could follow complex three-dimensional contour of the latter, and provided with the transmission system of the beam, which allows you to direct and focus the laser beam on a flat or cylindrical surfaces.

Finally, in the patent of the author Taniguchi does not mention the possibility of transferring images the wood texture on the wooden base, and is not specified the fact that the image is transferred to the depth of several tens of millimeters below the surface.

The purpose of the present invention, therefore, is to create a device for image transfer on wood base using a laser that does not have the disadvantages indicated above, and therefore enables playback of images on this wooden base, in accordance with the wishes, with high precision, making it possible to achieve high processing speeds and/or greater depth image transfer within the base.

Another objective of the present invention is to create a device for transferring images to wood base with a laser and method of its operation, which allows the t to transfer the images on the base, having complex three-dimensional shape, that is, not only on a flat surface or a three-dimensional surface with axial symmetry, but also asymmetric details, such as the butt (or bed) rifle or pistol grip. Another objective of the present invention is to provide a method of transferring images on a wooden base using a laser beam, which is also easy to implement and which provides high efficiency by using the above device.

Another objective of the present invention is to create a method of moving image reproducing texture of wood, on a wooden base using a laser, which produces a finished product with an extremely natural appearance.

Disclosure of inventions

These and other objectives are achieved by using the device images are transferred to the wooden base using laser in accordance with the first independent claim and the subsequent dependent on his claims, dependent, and using the method of image transfer on wood base with a laser in accordance with the twelfth independent claim and the subsequent dependent claims. The device pereosazhdeniya on wooden base in accordance with the present invention, contains a tool that is designed to receive and/or generate an image of at least one laser beam source, a tool designed to focus and move rotatably and/or translational movement of the laser beam relative to a wooden base, or Vice versa, at least one module control emission of the laser beam, at least one control module specified by means of focusing and movement, as well as the means of conversion of image information intended for transmission of instructions for adjustment module radiation of the laser beam for control module specified by means of focusing and moving.

Preferably, the specified module laser beam adjustment is made with the ability to adjust the specified radiation of the laser beam by directly modifying the pumping of the active substance and/or change the mode of operation of the modulator installed in the cavity of the specified source of the laser beam. In particular, in accordance with preferred aspects of the present invention, when a gas laser source (such as a CO or CO2) is used as the laser source, the specified module could regulate the radiation of the laser beam allows you to directly regulate radiochastotny is pumping gas, representing the active substance. Alternatively, when the device in accordance with the present invention uses a laser active substance in the solid state, the module control allows you to adjust the q-modulator, which is installed directly inside the resonator of the laser source. By controlling the pumping of the active substance, or regulation modulator installed inside the resonator can be obtained device in accordance with the present invention, which provides extreme precision when controlling the intensity of the emitted beam, and therefore, more accurate image on wooden base, mainly when images are displayed in grey colour, and you can use much higher power (up to 1500 watts or more) to handle such a wooden base.

In addition, by direct manipulation of the pumped or modulator inside the cavity can provide significant energy savings in comparison with the known device (in particular, when using CO2lasers excited by an electromagnetic field in the radio frequency mode that is preferred).

In addition, in accordance with a preferred aspect of the present invention MC is connected a means of focusing and moving with rotation and/or linear movement of the laser beam relative to the wooden base can be of a type, which has a scanning head with 2 or 3 axes. Thus, it is possible to obtain high accuracy in focusing, that is, when adjusting the focal length, and when moving, i.e. when moving the laser beam (or better its track or spots on the treated base) relative to that of the wooden base, which allows you to use the device in accordance with the present invention to transfer the images also on the base, having a three-dimensional, non-symmetrical shape.

In accordance with another aspect of the present invention, a method of transferring images on a wooden base with a device which provides at least one laser beam source, a means of focusing and moving a laser beam relative to that of the wooden base, and at least one module control specified radiation of the laser beam, containing the following steps:

- get and/or create images designed for transfer;

- conversion information of the image in the instructions for the regulation of radiation, movement and focusing of the laser beam relative to the specified base;

control means for moving and focusing module and regulation of the laser beam in accordance with the above Ann is the instructions, to display the image on a wooden base.

The method in accordance with the present invention also provides a module regulatory control of radiation of the laser beam by directly regulating the pumping of the active substance and/or by adjusting the modulator is installed within the cavity of the laser source.

In a specific embodiment of the method in accordance with the present invention, moreover, the purpose of this method is to transfer the image, preferably of such a type that contains 16-256 grayscale reproduction of the texture of wood on a wooden base so that reproducible texture has a natural appearance.

To this end, in accordance with a particular variant of the process in accordance with the present invention, the applicant has set the interval in the range of 2.35 j/cm2to 43.7 j/cm2energy per unit surface area, which provides a local effect of the laser beam on a wooden base with the aim of often up to a thickness of several tens of millimeters, without charring or removed from it unnecessary material. In accordance with another aspect of the method according to the present invention, the image that is designed to transfer at least h is partially, form randomly and transferred to the wooden parts of firearms, such as arms pistols or carbines, rifle butts and fore-end rifles, etc.

Brief description of drawings

A specific embodiment of a device in accordance with the present invention and a specific embodiment of the method of operation of this device will be described below with use of non-limiting example, with reference to the attached drawings, on which:

figure 1 shows the functional diagram of the device in accordance with a preferred aspect of the present invention;

figure 2 shows a block diagram of a method of operation of the device of figure 1.

The implementation of the invention

As shown in figure 1, the device for image transfer on wood base 10 in a specific embodiment, the present invention provides tools 1, 2, 3, designed to receive and/or generate the image I, at least one of the source 5 of the laser beam L, the means 6, 8 focus and direction of the laser beam L on a wooden base 10 (or Vice versa, to move the wooden base 10 relative to the laser beam (L), at least one module 4 regulation of radiation of the laser beam L impinging on the laser beam source 5, and at least one module 7, 9 management of these funds and 6, 8, for focusing and sending (or movement) of the laser beam L.

It should be understood that the expression "means of focusing and direction (or direction, or movement) of the laser beam on the basis of" means here and below means to determine the spot size, i.e. the trace of the laser beam L on the workpiece 10 by focusing and installation, for example, by using optical fibers or mirrors, motor, or other optical devices, or electro-optical means known in the art. The device illustrated here, also contains the tool 1 converting image information of the image I into a set of work instructions for the specified module 4 regulation of radiation of the laser beam L, and module 7, 9 control means 6, 8 focus and move (or direction) of the laser beam L on a wooden base 10.

In a particular embodiment, the device in accordance with the invention, as described, means for obtaining and/or generating image I can contain the processor 1, if necessary, connected to the element 2 to obtain images (scanner), which provides a software tool 3 that controls, at least. the image i. In this case, the image i manage and retain it in the processor 1 in the signal is the first format, such as the image as a bitmap display, bitmap or vector images directly. Preferably, as will be shown below, such an image I to be processed and stored so that there is obtained a digital image represented either in black and white or with the use of 16-256 shades of gray.

A software tool 3 that controls the image I, can contain any editing program image, adapted, for example, to edit any image, translated into digital form by means of the scanner 3, or may contain a system of CAD, computer-aided design system) for impromptu creation of image I, or also can be any program that is suitable for forming a random or pseudo-random way any image I in accordance with the requirements of the operator.

When this device is used to transfer images I, reproducing the texture of the wood, on wooden base 10, in accordance with a preferred aspect of the present invention, a software tool 3 allows you to generate random or pseudo-random way image as the texture of the wood on the basis of the corresponding basis elements that you have installed the software tool 3 during the development phase, or can also be programmed before using the software 3.

In illustrated here, the embodiment of the device in accordance with the present invention, in the processor 1 may also be provided by additional software tool 3, such as a vehicle type AK-APR (SAE-ITSELF, computer-aided design and manufacture), for converting image information obtained image I in the operating instructions for the device 1.

Such work instructions, as is usual in systems, APR, may be the instructions of geometric type, designed to control the direction of the laser beam L on a wooden base 10, and a functional type, designed to regulate the intensity, pulse frequency and focus of the laser beam L to ensure that it can be played, if necessary, using a halftone image I on a wooden base 10.

In particular, in the described device the processor 1, the acting in this case as a tool for AK-APR converting image information in the operating instructions for these devices functionally connected to module 4 of the regulation for laser source 5 module 7 management for system 6 focus and direction, that is, move the laser to the CSO beam L (or better, it stains) translational and rotation relative to the base 10, and module 9 management table 8 - holder details, equipped with a mechanism (not shown) for the movement of table 8 and/or the base 10.

The laser source 5 in accordance with the present invention may be of any known type, but in particular, it may be of a type which contains a gaseous active substance, such as CO2WITH, or solid active substance, such as crystals, doped with neodymium, ytterbium, erbium, or on the basis of exameron with ultrafialetovm radiation. It should be noted that the use of laser sources WITH2and WITH pumped electromagnetic field in the radio frequency mode (27-81 MHz) showed appreciable advantage in terms of the wavelength of the laser beam (approximately 10 μm), leading to optimal processing of wood, and in relation to a wide range of capacities and output values that can be obtained.

The laser source 5 presents the devices, in addition, preferably, the control module 4 regulation of this type, which allows you to directly regulate the pumping of the active substances in the gaseous state, and/or to adjust the modulator, if it is provided, preferably of the type modulator of the bar is dstone mounted in the cavity of the laser source 5, when the active substance is in the solid state.

Module 4 control allows you to adjust as the power emitted by the laser beam L, and the frequency of the pulses as a function of the specific processing requirements of the wooden base 10.

Through direct regulation of the pumping of the active substance or using modulation inside the resonator of the laser beam L can more effectively manage the power of the light beam L and can provide significant energy savings compared with the device of the prior art (mainly when using CO2/WITH lasers that are preferred).

In addition, this solution does not impose excessively small upper limit on the radiation power, which can reach 1500 watts and more.

Thus, unlike the prior art, after the laser source 5 is not provided by the modulators located outside the cavity and directly installed the tool 6 focus and direction of the laser beam L on a wooden base 10.

Preferably, the tool 6 is a facility of this type, which has a scanning head, that is, funds with mirrors (and lenses)that are controlled by the engine to the direction of the laser L, 2 or 3 axes, which are known in drugabusing options for use of laser beams. Use heads that scan on 2 or 3 axes, is especially preferred in the device in accordance with the present invention, because it allows to handle base 10, having a complex three-dimensional surface, the laser beam L with a high processing rates (mainly when using the galvanometric motors for scanning heads) and this ensures a high accuracy of positioning and focusing of the beam L (or spots) on the base 10.

As is known in the art, the scanning head 6 of the laser beam L can be controlled using the relevant module 7 control that allows you to control head 6, directing the beam L directly to the base 10 and adjusting the focal length of the beam L, setting it on the base 10. Module 7 management, in turn, respectively, operate in a specific device, as shown in figure 1, using the processor 1.

In accordance with another aspect of the present invention the device may also contain table 8 of the holder part, which is provided by actuators, for example, mechanical or hydraulic, designed to hold wooden base 10 and running module 9 management, which is also functionally connected to the processor 1. The holder 8 of the detail may be the this type which provides a simple clamps for installing the base 10, or it can be provided by the mandrel, the plan-washer (i.e., a table) with jaws and centering head (or heart)that also provides the ability to rotate the base 10, which is installed cantilever relative to the scanning head 6.

Actuators table 8 holder blanks, which provide linear movement or rotation of the wooden base 10 relative to the scanning head 6 of the laser beam L is controlled using a conventional module 9 management, which, in turn, is controlled in the described embodiment, using the processor 1.

However, it should be noted that although the above described scanning head 6 for focusing the laser beam L on the base 10 and table 8 of the holder part, driven mechanically or hydraulically, other appropriate means of focusing and/or movement of the laser beam L relative to the base 10, or Vice versa, moving the base 10 relative to the laser beam L, such as a plotter, or a system with multiple scanning heads or combined systems known in the art, can be used without going beyond the scope of the present invention.

Similarly, although described ISOE is isawanya CPU 1, which allows you to control how the source 5 of the laser beam L, and a variety of actuators required for the focus and direction of the laser beam L, the present invention is not limited to, using the processor, but also any other means, which are suitable for the regulation and control of the source 5 and the actuators 6, 8, such as one or more PLC, programmable logic controller)can be used as alternatives, without going beyond the scope of protection of the present invention.

Finally, the present invention also applies to devices that are not only equipped with a single laser beam L, but also on devices which provide many laser beams L, which act in concert with each other or individually on a wooden base 10.

A device such as described above, can be programmed to operate in accordance with one possible embodiment of the method of image transfer on wood base with a laser beam L in accordance with the present invention.

In this way the image transfer I on wooden base 10 using a device that uses a laser source 5, means 6, 7, 8, 9 focusing and moving a laser beam L with respect to the OS is Finance 10, and at least one module 4 regulation of radiation of the laser beam L, in General, provides for the following stages:

- obtaining and/or creating an image I designed for transfer to the base 10;

- conversion information of the image I in the instructions for the regulation of radiation, moving and focusing the laser beam L relative to the specified wooden base 10;

- drive in the action of the means 6, 7, 8, 9 move and focus, as well as the activation module 4 regulation of the laser beam 5 in accordance with these instructions to display the image I on a wooden base 10.

This method is also provided, as described above, the control module 4 regulation of radiation of the laser beam L by directly regulating the pumping of the active substance of the laser source 5 and/or by adjusting the modulator, which is properly installed in the cavity of the source 5.

In more detail, as shown in the diagram presented in figure 2, the preferred embodiment of the method in accordance with the present invention relates to image transfer, reproducing the texture of wood, wooden base, such as wooden parts for firearms.

In accordance with this PR is pactically variant implementation of the method in accordance with the present invention, such as described herein with reference to the layout of the device represented in figure 1, the specified stage of obtaining and/or creating image 1 can be performed by the processor 1, which can be implemented in appropriate integrated software tool 3 that is designed to control the image I and work instructions for the laser source 5, module 4 of the regulation and the means 6, 7, 8, 9, for the focus and direction of the laser beam L emitted by the source 5.

In this case, received or created the image I is preferably in digital format, in black and white or using shades of gray.

It should be noted that in accordance with the preferred method of direct control of the laser beam L on a wooden base 10, as provided in this specific embodiment of the method in accordance with the present invention, it would be useless to process and save the image I presented in color, because color cannot be reproduced on the basis of 10. However, we cannot exclude the possibility of transferring color images I on wooden base 10, for example, with the use of heated and sensitive to the color of the substances, or by other means known in the art, with the use of the cation of the method in accordance with the present invention.

The typical work cycle of the CPU 1, which is implemented appropriate software tool 3 integrated-type (get - edit images (or use CAD) - AK - APR), may consist of operations:

a) obtaining a digital image through the scanner 3;

b) editing the image I (for example, the imposition of filters to reduce the noise present in the digital signal, and/or convert the image to 256 shades of gray and so on);

c) save the image I in bitmap or raster format;

d) converting the image I in vector format;

e) entering and storing physical characteristics, configuration, material, etc. of the wooden base, intended for processing;

f) reading the vector of parameters of the image I and the conversion based on the specified physical characteristics of the base 10 with receipt: geometric instructions for tracking the contour of objects reproduced in the image I; functional instructions related to the radiation of the laser beam (emitted power and the pulse repetition rate of the laser) and focus the beam on the ground for optimum cutting conditions or evaporation or carbonization of the specified base layer 10 and, preferably, playback grayscale that can be presented from which the image I;

g) transfer of these instructions as related to the configuration and the functions in the corresponding module 4 regulation of the laser source 5 and module 6, 9 management tool focus and direction of the laser beam L.

When the image I, which must be passed, is to reproduce the texture of wood, such reproduction may be obtained using a pseudo-random generation of a texture, for example, using software tools, which, starting from a set of initial values of the texture allows you to create texture by generating a random configuration (e.g., fractal), in this case, the software tool can directly generate the image I in a vector format that can be converted into a process instructions to control the laser source 5 and the tool 6, 7, 8, 9 focus and direction of the laser beam L.

It should be noted that the method of processing wood using a pulsed, appropriately modulated laser beam (with a given frequency (f) can be modeled as follows, assuming that you want to define and maintain a constant amount of energy absorbed by the material per unit surface area at a given time interval.

In particular, it is etiti, that the desired effect is constant, when a pulse laser is also evenly distributed over the surface of the material. Thus we have the following (approximate) equation:

where Ei- energy single pulse;

P is the average power emitted by the source;

d is the spot diameter of the laser material;

v is the linear velocity of the laser on the surface of the material;

S is the surface covered by the laser spot (S=πd2/4).

The laser power required to obtain a given effect, thus is:

In accordance with this average power per pulse of the laser beam L, required for a given permanent effects on the base 10, is inversely proportional to the diameter d of the spot and directly proportional to the energy Eimomentum and velocity v processing. However, it should be noted that to obtain this effect on a wooden base 10 should also consider the so-called "spatial overlap of multiple pulseswhich is defined as follows:

where f = the pulse repetition rate of the laser.

fsis a constant that can be set to obtain the desired effect.

In particular, the Ohm, to prevent unwanted movement of the material and/or excessive charring of wood, the applicant has found that to transfer images I like black and white, and are represented by shades of gray, on wooden base 10, the base 10 must be in the ideal case is subjected to energy per unit surface with a value in the range of 2.35 j/cm2to 43.7 j/cm2to change colors of the wooden material in black to the depth, which can reach several tens of millimeters.

Thus, depending on the penetration depth of the image I in the wooden base 10, a shade of gray (or areas of black and white) image I designed for transfer, and, obviously, the type of wood material, the energy emitted by the laser cm2wooden base 10, will be in the range from 0 j/cm2to send the "white" areas of the image (I) to 43.7 j/cm2to send the "black" areas of the image I to depths of several tens of millimeters).

In accordance with these working conditions is ensured by the reduced evaporation of water molecules contained in the surface layers of wood material, which, in turn, leads to reduced removal of material from the base 10 and to reduce charring of the base 10, Engl whom it is manifested. When the transferred image I wood texture on the wooden base 10, such operating conditions of the laser beam L allow you to get a "very natural" result of the processed wood bases. After the image I designed for playback is received or created, and graphical information contained in the image I, is converted to the operating instructions for module 4 of the regulation of the laser source 5 and to the means 6, 7, 8, 9 focus and direction of the laser beam on a wooden base 10, also taking into account the above equations and the spatial shape of the base 10, a specific embodiment of the method in accordance with the present invention provides that under the control of the CPU 1, which is set to the appropriate software tool 3, module 4 of the regulation of the laser source 5 by directly regulating the pumping of the active substance or regulation modulator installed inside the resonator, provides radiation of the laser beam L with a corresponding power (or intensity) and the pulse frequency for a point or vector processing base 10 with a laser beam L. at the same time, the CPU 1 must control modules 7, 9 control means 6, 8 focus and direction, preferably consisting of a scan of the governing heads 6 and table 8 of the holder part, causing the laser beam L is directed and focused to reproduce the image I on a wooden base 10 point or vector method.

Thus, for each point or vector of the reproduced image I processor 1 and the modules 4, 7, 9 regulation and control determine the intensity (or power), frequency of pulses, the focal distance of the laser beam L based on 10 (which determines the laser spot on the surface of the base 10), as well as position, preferably along three axes of the spot (or footprint) of the laser beam L on the base 10. The source 5 and the tool 6, 7, 8, 9, obviously, should work as long as the image I will not be fully reproduced on a wooden base 10. Finally, it should be noted that, if necessary, wooden base 10 to its exposure laser beam L can be treated with appropriate reagents known in the art (see, for example, US 4847184), to acceleration or deceleration of carbonization or discoloration.

1. Device for image transfer (I) on a wooden base (10), containing:
the tool (1, 2, 3) to obtain and/or generate images;
at least one source (5) of the laser beam;
the tool (6, 8) to move with rotation and/or translational movement of the laser beam (L) with respect to decree the aqueous wooden base or conversely, to move the wooden base with respect to the laser beam (L), as well as for focusing the laser beam relative to the specified base;
at least one module (4) to regulate the output radiation of the laser beam;
at least one module (7, 9) management of the above mentioned means of travel and focus; and
means (1, 3) conversion information of the image specified in the instructions for the specified at least one module of the regulation and the specified at least one control module;
characterized in that the at least one module of the regulation regulates the radiation power of the laser beam by directly modifying the pumping of the active substance and/or changes in the operation of the modulator, located in the resonator of the laser beam source.

2. The device according to claim 1, in which the specified image in digital format, but such means of obtaining and/or creating images in digital format has a capability to retrieve and save bitmap or raster or vector images in black-and-white view and/or using shades of gray.

3. The device according to claim 1 or 2, characterized in that the said means of focusing and moving with rotation and/or translational movement of the sod is RIT the scanning head with 2 or 3 axes for movement of the beam.

4. The device according to claim 1, characterized in that the means for obtaining and/or creating the image contains at least one processor and software for image processing.

5. The device according to claim 4, characterized in that it contains at least one software tool for the formation of random images of wood grain.

6. The device according to claim 1, characterized in that the means for obtaining and/or image creation and a means of converting information from one image to the instructions for module control and for the control module and the specified at least one module of the regulation and the specified at least one control module include at least one processor, equipped with software CAD system and/or AK, and/or APR.

7. The device according to claim 1, characterized in that the active substance, at least one source of a laser beam selected from gaseous materials, solid materials or exameron with UV emission.

8. The device according to claim 1, characterized in that the power of the laser beam emitted from the specified at least one source of laser beam is in the range from 1 to 1500 watts.

9. The device according to claim 1, characterized in that the at least one source emits a laser beam with a wavelength in the range from 0.1 to 20 μm.

10. The device according to claim 1, in which the active substance source of the laser beam is in a gaseous state, with the specified at least one module control emission of the laser beam provides a tool to directly modify the excitation source with a radio-frequency pumping.

11. The device according to claim 1, in which the active substance source of the laser beam is a substance in the solid state, with the specified at least one module control emission of the laser beam contains a modulator of installed inside the resonator.

12. The way images are transferred to the wooden base using a device containing at least one laser beam source, a means of focusing and moving a laser beam relative to that of the wooden base, and at least one module to regulate the output radiation of the laser beam, comprising the steps are:
get and/or create an image that is designed for transfer;
transform information of the image in the instructions to control the radiation power, movement and focusing of the laser beam relative to the specified base;
control means for moving and focus and the specified at least one module of the regulation is according to the instructions to display the image on wooden base;
characterized in that the at least one module of the regulation regulates the radiation power of the laser beam by directly modifying the pumping of the active substance and/or change the mode of operation of the modulator installed in the cavity of the specified at least one laser beam source.

13. The method according to item 12, which is received and/or generated image is an image in digital format.

14. The method according to item 13, in which the image is in bitmap, raster or vector format.

15. The method according to item 13 or 14, in which the image receive and/or create a black and white view, or using shades of gray.

16. The method according to item 12, in which the image represents the image of wood grain.

17. The method according to item 16, characterized in that the image texture of the wood is obtained by forming at random.

18. The method according to item 12, in which the wooden base is a handle of a pistol or carbine, or the butt and/or the rifle stock.

19. The method according to item 12, wherein the instructions for adjusting the radiation, movement and focusing of the laser beam relative to the base ensure penetration of the laser beam in the wooden base to a depth in the range from 0.1 to 1 mm.

20. The method according to item 12, characterized in, Thu the instructions for the regulation of radiation, movement and focusing of the laser beam relative to the base to provide exposure to the laser beam, the surface energy per unit surface area in the range from 0 to 43.7 j/cm2.

21. The method according to claim 20, characterized in that the substrate is locally subjected to irradiation with a laser beam with an energy per unit surface area in the range of 2.35 to 43.7 j/cm2for often portion of the surface of the base exposed local irradiation.

22. The method according to item 12, in which before the step of the management of the above mentioned tool and move the focus and the specified at least one module of the regulation in accordance with the instruction to display the image on a wooden base wooden base is treated with reagents to accelerate its carbonization and discoloration.



 

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3 dwg

FIELD: physics.

SUBSTANCE: method of moving exit neck while keeping its size constant involves using a two-component laser optical system. The laser optical system has a first movable component at a distance d1 from the entrance neck, a second movable component at a distance d2 from the first component and the exit neck. The exit neck lies at a distance d3 from the second component. Parametres of the laser optical system are linked by the relationships: magnification of the first component defocusing of components focal distance of the second component . Longitudinal distances d1, d2 and d3 are varied according to the following laws: ; Movement of the exit neck with change in the length of the laser optical system is realised according to the following law: where: α is longitudinal magnification of the laser optical system; is focal distance of the first component; Zk is a confocal parametre, Zp is the distance from the focus of the first component to the entrance neck; P0=P(zptt)=const is the full, characteristic relationship between longitudinal magnification and the current structural parametres.

EFFECT: possibility of moving a constant-size neck in a wide range with small displacement of components of the laser optical system.

2 cl, 2 dwg

FIELD: physics, optics.

SUBSTANCE: laser consists of the following, arranged in series on one optical axis: laser radiation source, polariser, telescopic system of two lenses, a convergent cylindrical lens and a solid-state active element in form of a rectangular prism. One of the side faces of the prism has an element based on a sol-gel sample doped with active centres, while the second side face has a reflecting layer. Between the radiation source and the active element there is an electro-optical deflector having optically connected liquid-crystal twist-cell which is controlled by an electric field and a birefringent prism. The method of shifting the laser frequency involves exciting its active element with initial laser radiation in form of two converging coherent light beams to create a distributed feedback in form of periodic variation of optical parameters of the active element due to interference of these two beams. The angle of incidence of the initial radiation on the active element is measured by passing it through the liquid-crystal twist-cell and through the birefringent prism. The electric field controlled twist-cell changes the polarisation plane of the initial radiation by 90°, and the birefringent prism deflects the initial radiation with different polarisation planes by different angles.

EFFECT: possibility of controlling generation wavelength of a solid-state laser on active centres using voltage.

2 cl, 4 dwg

FIELD: physics, optics.

SUBSTANCE: method involves formation of an initial converging laser beam and converting it to a beam with polarisation mode distributed on the aperture using a birefringent element, polarisation filtering of the beam with a polariser, adjustment of the spatial profile of intensity of the beam by rotating the birefringent element, or the polarisation vector of the initial converging beam, or polariser. The birefringent element is a birefringent plate lying between telescopic lenses and enables creation of a non-identical angle between the axis of the birefringent plane and the wave vector of an extraordinary ray for identical angles of deviation of the rays from the axis of the beam, which enables formation of a parabolic spatial profile of intensity after polarisation filtering, identical in one of the planes along the direction of propagation and all planes parallel to the said plane on the entire aperture of the beam.

EFFECT: formation of a laser beam with a parabolic spatial profile of intensity with controlled level of intensity of radiation at the centre of the parabola, as well as controlled position of the parabola on the aperture of the beam.

3 dwg

Scanning laser // 2402125

FIELD: physics.

SUBSTANCE: laser has two plane mirrors, one of which completely reflects and the other partially transmits laser radiation, two converging lenses, a polariser, an active element and a spatial light modulator. The active element is symmetrically placed between the lenses. The lenses are confocally placed between the mirrors. The reflecting surfaces of the mirrors coincide with focal planes of the lenses. The laser also has a heat exchanger. The active element is in form of a disc or plate. On one side of the disc or plate there is an antireflection coating and on the other there is a total reflecting coating on the wavelength of the laser radiation. The element is fitted on the heat exchanger by the side with the total reflecting coating.

EFFECT: larger angle of vision and dimensions of the processing zone when using the scanning laser in location systems and industrial process installations respectively, and faster operation and higher efficiency.

1 dwg

FIELD: physics.

SUBSTANCE: laser has an active element which emits a beam of radiation at different wavelengths during pumping and a spatial light modulator. The laser resonator has an output partially reflecting flat mirror lying on the optical axis of the resonator in front of the active element, a flat totally reflecting mirror lying on the optical axis of the resonator after the spatial light modulator, a prism composite system and a quarter-wave retarder, arranged in series on the optical axis of the resonator between the active element and the spatial light modulator. The prism composite system consists of an even number of optically interfaced identical 2N triangular prisms, where N is greater than or equal to 1. The prisms are arranged such that planes of the input and output faces of any i-th prism are parallel planes of the output and input faces of the [(2N+1)-i]-th prism respectively, where i varies from 1 to N. The spatial light modulator is made in form of an electrically controlled plate lying orthogonally to the optical axis of the resonator, with linear control electrodes which are parallel to the intersection line of the planes of the input and output faces of the last prism in the prism composite system. The spatial light modulator is connected to a voltage unit which is made with possibility of programmed control of the value of voltage across electrodes of the spatial light modulator.

EFFECT: generation of radiation with real time control of the number and length of waves of emitted spectral components using a laser with tunable emission spectrum with high operating reliability of the laser.

3 cl, 1 dwg

FIELD: physics.

SUBSTANCE: optical medium for converting monochromatic laser radiation with wavelength 975±5 nm to the 1483-1654 nm band is a complex calcium tetragermanate of erbium and yttrium of formula ErxY2-xCaGe4O12, where 0.1<x<0.3. The method of making the said optical medium involves preparation of two initial mixtures of components containing the following in wt %, respectively: calcium carbonate - 11.11; erbium oxide - 42.45; germanium oxide - 46.43 and calcium carbonate - 13.45; yttrium oxide - 30.34; germanium oxide - 56.21. Separate mixing of components of each mixture is carried out in the presence of an alcohol, as well as heating to 700-900°C and maintaining that temperature for 8-10 hours. Repeated heating is carried out to 1050-1100°C, while maintaining that temperature for 100-150 hours and reburdening every 20 hours. Both initial mixtures are then mixed in ratio of 1:4.6-15.3 in the presence of an alcohol and heating to 1050-1100°C and maintaining that temperature for 40-50 hours and reburdening every 10 hours.

EFFECT: possibility of converting monochromatic radiation into a band with simultaneous amplification during operation of the laser in continuous pumping mode.

2 cl, 3 dwg, 2 ex

FIELD: physics.

SUBSTANCE: proposed method comprises advancing laser pulse through converter nonlinear crystal. Prior to advancing to crystal, laser pulse is frequency chirped, while produced second harmonic impulse in time compressed. Note here that duration of second harmonic pulse after compression is defined from relationship where τ is main frequency pulse duration, and τch is chirped pulse duration.

EFFECT: two fold decrease in second harmonic pulse relative to starting femtosecond laser pulse with duration over 100 fs with high-efficiency conversion.

3 dwg

FIELD: physics, optics.

SUBSTANCE: spatial filter 6 includes two focusing elements 8, 9 and a diaphragm 7 lying in the region of their focal planes in an evacuated housing 14. The diaphragm 7 is a refraction-type diaphragm with a profiled opening and is made from material which does not absorb laser radiation through a multiple photon absorption mechanism. The device for generating laser radiation has series-arranged driving laser generator 1, laser beam 2 expander 3, filter 6 which filters the laser beam 2 during its direction and reverse passage, a double-passage radiation power amplifier 10 and a wave front reversing mirror 11. The polarisation isolation device has an output polariser 4 and polarisation rotator 5. The polariser 4 is placed between the expander 3 and the focusing element 8. The rotator 5 is placed between the double-passage power amplifier 10 and the mirror 11.

EFFECT: reduced destructive effect of radiation on material of the diaphragm and improved quality characteristics of the filtered laser radiation.

18 cl, 2 dwg

FIELD: physics.

SUBSTANCE: pulsed solid-state laser has a resonator formed by partially transparent and non-transmitting mirrors, inside of which there is an active element, a polariser and an electrooptic element. Between the active element and the partially transparent mirror there is a 90-degree radiation polarisation rotator and a second polariser. Outside the resonator two swivel mirrors are placed such that, together with the polarisers, they form an annular resonator which has an active element and a 90-degree radiation polarisation rotator. The active element is made from an optically isotropic crystal.

EFFECT: higher frequency, degree of uniformity of spatial structure of radiation, stability of energy parametres of radiation pulses from pulse to pulse and degree of polarisation of the output radiation.

1 dwg

FIELD: machine building.

SUBSTANCE: invention refers to method of laser labelling surface of metal or its alloy and can be implemented in machine building, jewellery industry and medicine. The method consists in preliminary plotting a calibration curve of dependence of depth of marking surface of a sample of specified metal or its alloy by means of effect of specific power of radiation incoming on surface. By means of a computer there is generated a protective digital code, where specific depth of marking and specific power of laser radiation correspond to each digit. A mark visible by a naked eye is applied on the marked surface of metal or its alloy by means of laser radiation transferred along marked surface; this mark corresponds to alpha-numeric or graphical information. A protective digital code in form of sequence of recesses invisible to a naked eye is applied on the produced surface visible to a naked eye; this code is marked by laser radiation of specific power chosen from the said calibrating curve.

EFFECT: high level of protection and simplified process.

8 cl, 5 dwg, 1 tbl, 1 ex

FIELD: printing industry.

SUBSTANCE: invention is related to security paper, in particular to banknote, having individual mark, which is applied at least once on face and reverse side of security paper. At least one of individual identifiers applied on face and reverse side of security paper is applied onto security paper by contactless method. Besides application of individual identifiers on face and reverse side of security paper is carried out by means of single-sided treatment of security paper.

EFFECT: high degree of security paper protection, with minimum production costs.

32 cl, 16 dwg

FIELD: technological processes.

SUBSTANCE: invention may be used in systems of laser marking and engraving in industry, for artistic applications, for authentication and personification of items and documents. Method for application of raster image consists in the fact that image of original is introduced into computer, image is transformed into raster array of numbers, working element coordinates are changed, working element is put in action, and dots are applied with its help onto surface of item. Working element used is represented by laser radiation. At the same time test image is previously downloaded into computer, and this image is applied onto surface of test sample, produced result is assessed, and laser radiation properties are accordingly adjusted in compliance with it. Multistage filtration of raster array of numbers is carried out, afterwards image of original is marked onto item.

EFFECT: high quality of applied image, increased resource of equipment, higher speed of image application, and also expansion of field of materials suitable for application of images.

6 dwg

FIELD: technological processes.

SUBSTANCE: digital array of data is created, which defines graphical configuration of partial plating, at that, using digital array, trajectory of tool motion is calculated, as well as control data for tool control, at that tool and single- or multi-layer film carcass are moved in relation to each other in accordance with tool motion trajectory. Tool that is controlled according to control data provides partial discrete de-metalation of metal layer by means of application of wipe-off mask for partial masking of single- or multi-layer film carcass. Foresaid mask is applied by spraying. Single- or multi-layer film carcass is further dried, provided with metal layer, and metal layer is partially removed by flushing method in area of wipe-off mask.

EFFECT: efficiency from production point of view, possibility to apply coating on different surfaces and exclusion of thermal or mechanical effect onto surface.

13 cl, 16 dwg

FIELD: protective members for visual controlling of authenticity of printing product such as security papers, banknotes, identification cards.

SUBSTANCE: protective member is formed as color layer applied to substrate and having color-free portions produced by exposing color layer to laser radiation for forming of image detected by visual control. Substrate surface is provided with relief, said image being formed on at least one side of relief after exposing to laser radiation falling at predetermined angle to relief surface. Protected printing product is equipped with protective member for visual controlling of paper authenticity.

EFFECT: increased extent of protecting printing products due to creation of protective member more complicated for counterfeit and using optical variable image.

7 cl, 5 dwg

FIELD: printed matter of special format.

SUBSTANCE: multi-layered article comprises the layer sensitive to the laser radiation, marking member, e.g., diffraction and/or holographic structure, reflecting layer, and print formed in the second layer and/or in the layer sensitive to the laser radiation. The layer sensitive to the laser radiation has markers that are made by means of laser radiation and precisely positioned with respect to the marking member.

EFFECT: enhanced reliability of protection.

27 cl, 40 dwg

FIELD: printed matter of special format.

SUBSTANCE: multi-layered article comprises the layer sensitive to the laser radiation, marking member, e.g., diffraction and/or holographic structure, reflecting layer, and print formed in the second layer and/or in the layer sensitive to the laser radiation. The layer sensitive to the laser radiation has markers that are made by means of laser radiation and precisely positioned with respect to the marking member.

EFFECT: enhanced reliability of protection.

27 cl, 40 dwg

FIELD: protective members for visual controlling of authenticity of printing product such as security papers, banknotes, identification cards.

SUBSTANCE: protective member is formed as color layer applied to substrate and having color-free portions produced by exposing color layer to laser radiation for forming of image detected by visual control. Substrate surface is provided with relief, said image being formed on at least one side of relief after exposing to laser radiation falling at predetermined angle to relief surface. Protected printing product is equipped with protective member for visual controlling of paper authenticity.

EFFECT: increased extent of protecting printing products due to creation of protective member more complicated for counterfeit and using optical variable image.

7 cl, 5 dwg

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