Device to measure parameters and characteristics of radiation sources

FIELD: measurement equipment.

SUBSTANCE: device comprises a measurement bench, a radiation receiver, a processing and control unit with a device of information output. At the same time the measurement bench comprises a base, where two rotary devices are fixed, being arranged so that their axes of rotation are mutually perpendicular. On the first rotary device there is a fixation device for the investigated source of radiation. On the second rotary device there is a holder, on which there is an inlet window of a radiation transfer channel, such as an optic-fibre channel, and its outlet window is fixed on the receiver of optical radiation, such as a spectrometer.

EFFECT: higher accuracy of measurements during simplification of an assembly process and simultaneous automation of a process of measurements.

3 dwg

 

The present invention relates to measuring technique and can be used for measurement and certification of spatial, spectral, and color (for light sources in visible range wavelengths) of the parameters and characteristics of radiation sources, for example LEDs, infrared and ultraviolet-emitting diodes and other optical devices of the optical wavelength range.

In addition, the claimed invention may be useful in the development and quality control of radiation sources for high-precision positioning in various industries; in the development and creation of adaptive (changing spectral and color characteristics) multiple sources of lighting objects when their color analysis, in particular when the colorimetric identification; and under the control of high-quality light sources for carrying out high-precision color measurement or quality control of manufactured products according to their color characteristics.

At the moment there are many different devices for measuring the parameters and characteristics of radiation sources, for example:

measuring complex FT-17 industrial and multi-table performance, production company sovtest ATE" [Malyshev R.A. Comprehensive solution to DL the control and calibration of the parameters of the light-emitting diodes (LED) manufacturing and certification centers. // Production of Electronics", No. 5, 2010], the system OL 700-30 Goniometric Measurement Assembly manufactured by Optronic Laboratories Inc. [Electronic resource. The access mode to a resource: http://www.olinet.com/content/library/1223407322B099_700-30_12-04 .pdf free] or 940 - LED Gamma Scientific [Electronic resource. The access mode to a resource: http://www.gamma-sci.com/PDFs/RadOMA-LED.pdf - free]. Although these devices have high performance characteristics, they allow us to estimate the chromaticity of the radiation of the investigated radiation source and build a schedule of the distribution of the radiation in one plane only. With their help it is difficult to analyze the radiation characteristics of the investigated radiation source across the hemisphere radiation and to evaluate the quality of the source. In addition, the known device for measuring the parameters and characteristics of radiation sources are bulky complexes, consisting of a number of devices. Therefore, in order to make full certification of the radiation source, you need to check on each of them, resulting in significant time and dramatically reduces the performance of these systems.

Known patent "Device for measurement and calibration of the directional diagrams of light-emitting devices in the plane" (RU # 2361183, IPC G01J 1/18, publ. 10.07.2009). This device comprises a base on which races orogeny: a radiation source (hereinafter referred to the auxiliary radiation source), from which the light flux generated when the flow through it DC, via certified coordinate modulating the measuring line and the slit diaphragm enters the photodiode auxiliary radiation source; fixed horizontal disc rotating device (hereinafter - the rotator), which is the engine of your drive (hereinafter - drive motor) rotates around its vertical axis, the rotary device is mounted tripod (hereinafter - the mounting device) and for accommodation of the investigated emitter coordinate-modulated signals (hereinafter - the monitoring radiation source), while the auxiliary radiation source and photodiode auxiliary radiation source is rigidly fixed on the rotary device, and certified coordinate modulating the measuring range is part of a cylindrical surface in the form of a curved ribbon installed firmly and concentrically with the outer cylindrical surface of the rotary device, which is fixed to the left and right shutters, so that upon closing of the shutters of the gap between the photo-coupler limit switch has been activated (hereinafter, the measuring stand). Measuring stand connected to the photodetecting device is m (hereinafter referred to the receiver of optical radiation) through a transmission channel radiation. Thus the receiver of optical radiation is mounted on a stationary tripod, fixed on the basis of the measuring bench, in front of the investigated radiation source and the transmission channel radiation is an air gap between the test radiation source and the receiver of optical radiation. The known device also includes an electronic computer with a monitor, which is, essentially, a processing unit and control with output device information, and connected with the measuring stand and receiver of optical radiation.

The power of all elements of the known device and investigated the source of radiation is provided by a current source (hereinafter - the General power supply unit).

It is a known device for measuring the parameters and characteristics of radiation sources is selected as a prototype, because it has the largest number of essential features, coinciding with the essential features of the claimed invention.

However, the prototype has significant drawbacks, namely

- it is difficult to fully assess the characteristics of the radiation source, since the measurements are performed only in one plane;

- limited capacity is the receiver of optical radiation, because it cannot be measured spectral and color characteristics;

- low accuracy because of the presence of certified coordinate modulating the measuring line, requiring additional control provisions of the rotator relative to this line;

time - consuming Assembly process, due to the difficulty of adjusting the position of the receiver of optical radiation due to the fact that there needs to be perpendicular to the direction of radiation from the test radiation source on the sensitive area of the receiver of optical radiation.

The present invention is to provide a novel device for measuring the parameters and characteristics of radiation sources, which was achieved following technical result, namely: improving the measurement accuracy while simplifying the Assembly process and the simultaneous automation of the measurement process spatial, spectral, and color parameters of the radiation sources.

The problem is solved due to the fact that the device for measuring the parameters and characteristics of radiation sources containing the measuring stand, connected to a receiver of optical radiation through a transmission channel radiation, the processing unit and control with output device information, and coupled with, and the measuring stand and receiver of optical radiation, and a common power supply connected to each of the above devices, while measuring the stand includes a base, on which the fixed horizontal rotary device equipped with a driving motor, and is installed on the mounting device for the studied radiation source in the measuring stand on the basis of the vertically fixed more similar to those mentioned rotary device located so that the axis of rotation of both rotary devices are mutually perpendicular, and having a holder, which is fixed to the input window of the transmission channel radiation, which is applied fiber optic cable, and the output window is docked on the receiver of optical radiation, which is applied the spectrometer.

Thus, it is claimed technical solution to all your set of essential features can improve the measurement accuracy while simplifying the Assembly process and the simultaneous automation of the measurement process spatial, spectral, energy and color parameters of the radiation sources.

The applicant held the patent information search on the topic, which claimed the set of essential features is not revealed. Therefore, the present invention can be recognized as new.

The fit is of this invention with the patentability criterion of "inventive step" is proved as follows.

This invention for the specialist does not follow logically from the prior art. So, for example, known devices for measuring the parameters and characteristics of radiation sources allow for simultaneous measurements only in one plane or in two mutually perpendicular planes. Also used optical transmission channels of the radiation of the investigated radiation source to the receiver of optical radiation have relatively large dimensions, which reduces the number of analyzed points of the distribution of the radiation.

In the inventive same the invention due to the presence of a vertically arranged rotary device in the measuring stand becomes possible to assess the characteristics of the radiation source simultaneously throughout the hemisphere, that is, to get a 3D picture of the distribution of the orientation of the investigated radiation source.

Using a spectrometer as a receiver of optical radiation allows to measure the spatial, spectral, energy and color (for the studied source of radiation of the visible wavelength range) characteristics of the radiation source. When this synchronization works two rotary devices and spectrometer provides high positioning accuracy.

In addition, the automatic control is their measuring stand allows full automation of the measurement process. Use as a drive motor stepper electric motor will allow you to control the position of the rotary device without additional device controlling the position of the rotary device, it eliminates the need for additional adjustment of the position of the rotary device and increases the accuracy of its positioning.

The fiber-optic cable as a transmission channel of the radiation makes it possible to provide a perpendicular direction of the radiation from the test radiation source on the sensitive area of the receiver of optical radiation, which simplifies the alignment position of the receiver of optical radiation, and therefore facilitates the Assembly process. The diameter of the entrance window of the fiber optic cable can be from 200 to 600 μm, which specifies the minimum step of scanning indicator equal to

Δ=πR2l2,

where l is the distance from the test source to the input window of the fiber optic cable (e.g., 50 mm), a R is the radius of the entrance window of the fiber optic cable. Thus, there is the possibility of a detailed scan of the distribution of the radiation of the investigated source emitted the I with a large number of steps, increasing the number of analyzed points of the distribution of the radiation.

Using block processing and control processing of the measuring data received from the spectrometer, this allows you to determine the spectral and color parameters of the radiation source and bind the obtained values of the parameters of the radiation source to the spatial coordinates of the investigated hemisphere.

Therefore, by applying the proposed device for measuring the parameters and characteristics of radiation sources it is possible to comprehensively analyze the spatial characteristics of the radiation of the investigated radiation source together with its spectral and color radiation parameters with high precision.

Thus, the proposed solution is aimed at improving the measurement accuracy while simplifying the Assembly process and the simultaneous automation of the measurement process spatial, spectral, energy and color parameters of the radiation sources.

The essence of the invention and the possibility of its practical implementation is illustrated in the following description and drawings.

1 shows a block diagram of a device for measuring the parameters and characteristics of radiation sources, where: 1 - test stand; 2 - pickup the nick of optical radiation; 3 - channel transmission of radiation; 4 - block processing and management; 5 - output device information; 6 - common power supply; 7 - power supply for the measuring stand; 8 - the power supply for the receiver of optical radiation; 9 - power supply to the processing unit and the control and output device information.

Figure 2 shows a measuring stand, where: 1 - test stand; 3 - channel transmission of radiation; 10 - a; 11 - tilt unit; 12 - drive motor; 13 - rotator; 14 - drive motor; 15 - attachment; 16 - studied source of radiation; 17 - holder; 18 - input window channel transmission of radiation.

Figure 3 shows the explanation of the process of measurement, where: a is the spherical coordinate system, implemented in the proposed device for measuring the parameters and characteristics of radiation sources; 6 - an example of implementation of binding a spherical coordinate system to the investigated radiation source and changes the brightness of the radiation from this source for specific values of the Zenith and azimuthal angles. Notation: θ is the Zenith angle of the spherical coordinate system, φ is the azimuthal angle of the spherical coordinate system, M is the point on the sphere, XYZ - Cartesian coordinate system I(θ,φ) - power light source radiation at specific values of the Zenith and azimuthal what about the angles, ω is the spatial angle of radiation registered by a sensitive area And N is the normal to the sensitive area A.

Device for measuring parameters and characteristics of radiation sources (Figure 1) contains the measuring stand 1, which is connected with the receiver 2 of the optical radiation through the channel 3 transmission of radiation, unit 4 processing and management, provided with a device 5 to output information and coupled with the measuring stand 1 and the receiver 2 of the optical radiation, and the total block 6 meals, including source 7 power supply for the measuring of the stand 1, the power source 8 to the receiver 2 of the optical radiation and the power source 9 for unit 4 processing and control device 5 to output information.

Measuring stand 1 (Figure 2) includes a base 10, on which the fixed horizontal rotary device 11 is supplied with the driving motor 12 driving the rotary device 11, and vertically fixed more similar to those mentioned rotator 13, provided with a driving motor 14 driving the rotator 13. Moreover, the rotator 13 is located so that the axis of rotation of both rotary devices 11, 13 are mutually perpendicular.

The rotary device 11 installed in the fixing device 15 designed for the hard fix is tion of the investigated source 16 radiation and binding obtained spatial characteristics specific to the studied source 16 radiation as well as the power supply to it. The power source 16 radiation is carried out using a stabilized power supply (not shown).

On the rotator unit 13 is installed to the holder 17, which is fixed to the input window 18 channel 3 transmission of radiation, which is applied fiber optic cable, and the output window (not shown) attached to the receiver 2 of the optical radiation, which is applied to the spectrometer. The holder 17 provides the correct scanning of the upper hemisphere of the studied radiation source 16 radiation through tight control of the location of rotary devices 11, 13 relative to each other and necessary fixation of the input window 18 channel 3 transmission of radiation.

Thanks to the simultaneous use of two rotary devices 11, 13 is the spatial scanning of the upper hemisphere of the studied radiation source 16 radiation. The accuracy of the installation angle of each of the rotary device is 11,13 value is not more than 0.5 arc minutes.

As channel 3 transmission of radiation applied fiber optic cable, for example, with UV-resistant fibers to allow analysis of UV radiation sources.

The device 5 to output information intended for visual presentation of measurement results and is the th, for example, a monitor or a printer.

As unit 4 processing and control can be applied computing machine, such as, for example, personal or industrial computer, providing connection, operation and synchronization of the two rotary devices 11, 13 in the measuring stand 1 and the receiver 2 of the optical radiation, as well as the required speed of processing data in real-time. This is achieved portability of the claimed invention.

In this particular embodiment of the claimed device as the rotary device 11 can be used, for example, the angular slip 8MR190-2-4247 by Standa. And as the rotator 13 angular motion 8MR174-11-28S. Both of these movements are controlled by specialized software (not shown)contained in the processing unit 4 and the control.

Used angular motions provide a rotation angle of 360° with the maximum radial load of 1.5 kg and eccentricity of 10 μm, which ensures accurate positioning of the entrance window of the fiber optic cable input radiation in the spectrometer in the studied area. The minimum idle speed of progress will help to avoid large deviations in the real position of the input window of the fiber. the data meet the requirements of the development 8MR174-11-28S by Standa. The presence of the engine ST2818S1006 with 2-phase bipolar wiring, phase resistance 5.6 Ohms, which provides 200 steps per revolution when the current of 0.67 And managed by computer, will provide the necessary performance of the claimed invention.

The base 10 is, for example, the mounting plate is made with the possibility rigid and secure it to the other elements of the measuring stand 1.

Source 7 power supply for the measuring stand 1 provides rotary devices 11, 13. Source 8 power supply for receiver 2 optical radiation provides the receiver 2 of the optical radiation. The power source 9 for unit 4 processing and control device 5 to output information provides the processing unit 4 and control device 5 to output information.

In a particular implementation on the measuring stand 1 may be analyzed radiation sources 16, such as LEDs, infrared and ultraviolet light emitting diodes and other optical devices in the optical range of wavelengths, the distance between the contacts of which does not exceed 2.54 mm, and the range of radiation, not beyond the range of the spectrometer (from 200 nm to 1.2 μm). If necessary, analysis of radiation sources 16 with a non-standard scheme is the connecting possible replacement device 15 of the fastening.

In the case of research sources 16 radiation in the medium and long PC region of the spectrum it is possible to replace the used model of the spectrometer to another, working in the area of the spectrum (the holder 17 has a standard size mounting the input window 18 channel 3 transmission of radiation).

As the receiver 2 of the optical radiation can be applied to the spectrometer, for example, USB4000 company OceanOptic. The spectrometer to determine the spatial, spectral, and color (for the studied sources of radiation of the visible wavelength range) parameters and characteristics of the source 16 of the radiation at any point in the scanned hemisphere.

To automate the operation of the spectrometer and synchronization with the operation of rotary devices 11, 13 can be used software package OmniDriver (OMNI+SPAM), pre-installed in unit 4 processing and control.

This embodiment of the invention has minimum dimensions and allows precision to determine the spectral, energy, color (for sources of radiation of the visible wavelength range) and spatial characteristics of the radiation source.

The software of the device for measuring the parameters and characteristics of radiation sources allows to measure the spectra of radiation research which has been created of radiation sources. During the measurements, it is possible to perform signal processing: subtract the dark current and the background from scattered radiation, to smooth and average spectra. Displaying real-time data allows you to evaluate the performance of the measuring stand and the performance of the selected algorithms, promptly change the setting, immediately see the result of your changes and save the data.

The software of the inventive device allows you to synchronize the operation of two rotary devices 11, 13 and spectrometer in order to obtain not only the spectral characteristics of the radiation at each point of the distribution, but the color coordinates of the radiation and the color temperature of the radiation. There is the possibility of determining the spectral characteristics in relative and absolute units. You can build a two-dimensional slices of the measured distribution of the radiation in polar coordinates obtained 3-D model of the distribution and a color map of the radiation source. Implements the selection of the analyzed spectral range during the measurement.

The proposed device operates as follows.

The analyzed source 16 radiation is fixed in the fixing device 15 on the rotary unit 11, a horizontally mounted on the basis of the measuring stand 1.

Radiation from the analyzed source is 16 radiation is fed into the input window 18 channel 3 transmission of radiation, then, after passing through the channel 3 transmission of radiation, it arrives at the receiver 2 of the optical radiation. Turning unit 13 rotates the holder 17 with a fixed input window 18 channel 3 transmission of radiation. The holder 17 provides the correct scanning of the upper hemisphere of the studied radiation source 16 radiation through tight control of the location of rotary devices 11, 13 relative to each other and necessary fixation of the input window 18 channel 3 transmission of radiation.

The upper hemisphere is scanned as follows (Figure 3). The rotator 13 with the holder 17 sets the initial value of the Zenith angle θ. Next, the rotary unit 11 sets the initial value of the azimuthal angle φ, and the receiver 2 of the optical radiation through the channel 3 transfer radiation captures the spectral and energy parameters of the studied radiation source 16 radiation for selected values of the Zenith and azimuthal angles. Next, the rotary unit 11 changes the value of the azimuthal angle φ and repeats the measurement of spectral and energy parameters of the studied radiation source 16 radiation for the data values of the azimuthal and Zenith angles. After the implementation of the full cycle of change of the azimuthal angles φ rotator 13 with the holder 17 changes meant the e Zenith angle θ, and the measurement cycle is repeated. The measurements are performed for all possible values of azimuth and Zenith angles. The minimum step change of the Zenith and azimuthal angles is 41 angular minute.

By means of the receiver 2 of the optical radiation carry out the removal of the distribution of the radiation of the investigated source 16 radiation. With the help of block 4 processing and control processing of the measuring data received from the receiver 2 of the optical radiation, this allows you to determine the spectral and color parameters of the radiation source and bind the obtained values of the parameters of the radiation source to the spatial coordinates of the investigated hemisphere. The measurement results are recorded, stored and processed in the processing unit 4 and control, and the image of the volumetric distribution of the radiation, the distribution of the radiation in polar coordinates, range and color maps of the investigated source 16 of the radiation received by the device 5 to output information.

Thus, the invention aims to improve the measurement accuracy while simplifying the Assembly process and the simultaneous automation of the measurement process spatial, spectral, energy and color parameters of the radiation sources.

Device for measuring the parameters and characteristics is istic radiation sources, containing the measuring stand, connected to a receiver of optical radiation through a transmission channel radiation, the processing unit and control with output device information and coupled with the measuring stand and receiver of optical radiation, and a common power supply connected to each of the above devices, while measuring the stand includes a base, on which the fixed horizontal rotary device equipped with a driving motor, and is installed on the mounting device for the studied radiation source, characterized in that the measuring stand on the basis of the vertically fixed more similar to those mentioned rotary device located so that the axis of rotation of both rotary devices mutually perpendicular, and having a holder, which is fixed to the input window of the transmission channel radiation, which is applied fiber optic cable, and the output window is docked on the receiver of optical radiation, which is applied to the spectrometer.



 

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FIELD: measurement equipment.

SUBSTANCE: base for this cryostat is a casing 1, made in the form of a sleeve from a heat insulation material (for instance, foam plastic). On the bottom of the inner part of the casing there is a sample holder 2, made of a material with high heat conductivity for reduction of temperature gradient (for instance, of copper). In the bottom of the casing 1, near the generating inner wall, there is one or several holes 3. The bottom outer part of the body is made so that it is tightly (without gaps) installed into a neck part of a vessel 4 with a liquid cryoagent 5. In process of evaporation the cold gaseous cryoagent arrives via holes 3 inside the casing and displaces warm (moist) air from it, and therefore eliminates the possibility of freezing of a holder and a sample investigated on it. Vapours of the coolant wash the holder, which results in its cooling.

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FIELD: measuring technique.

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FIELD: measurement equipment.

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SUBSTANCE: mask is a sheet made of an infrared radiation-blocking material. The mask has through-holes, which are formed to enable the percentage change of the corresponding regions of two pyroelectric elements irradiated by infrared rays when the radiation source moves on two coordinate axes. The holes form two aperture regions. The boundary of one of the aperture regions protrudes in the direction perpendicular to the arrangement of the pyroelectric elements, further than the boundary of the other aperture region.

EFFECT: high sensitivity and enabling the detection of a moving object simultaneously on two coordinate axes.

6 cl, 40 dwg

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