The device is cursor control optical mouse

 

The invention relates to input information into the computer. Its application allows to obtain a technical result in the increase of the moving speed of the cursor, reduce power consumption and extend the functionality of computer optical mouse. This result is achieved due to the fact that in the known device input information into the computer mirror illuminator light wave conductors are made concentric and covers the lens photodetector of the optical channel at an angle with its axis, providing a reflection of rays of light at the output surface of the light wave conductors and through it to the site of the subject surface, and one or more optical surfaces of the light wave conductors and photodetector of the optical channel in the optical system is made aspherical. 4 C.p. f-crystals, 3 ill.

The present invention relates to techniques for machine vision and can be used in contact scan converters image, in particular an optical mouse to control the cursor on the computer screen, portable reader texts for the blind, etc.,

The known device cursor control optical mouse, opican. the both patents describe devices containing casing of the mouse, including: printed circuit Board, integrated circuit (IC) sensor vector move the mouse with the photodetector, the optical window aperture, an optical system containing a lens in an optical channel photodetectors IP shared with one hand with a hole in a printed circuit Board, an optical window aperture and photodetectors IP, and on the other with an optical window, focused on the specimen surface at the bottom surface of the housing. The optical system also contains fiber wire for lighting the emitter area of the subject surface through the optical window.

Closest to the claimed invention is a device description optical mouse HDNS-2000, 2100, for “Agilent Technologies” presented by the applicant. The specified device includes: an optical system including the lens photodetector of the optical channel and fiber wire, oriented lens photodetector of the optical channel on the object surface on one side and a matrix of photodetectors on the other, and the light wave conductors with one hand on the object surface, and on the other to the illuminator, the circuit Board with the above optical system integrated circuit sensor is a matrix of photodetectors, to optically connect the matrix of photodetectors with lens photodetector channel, projecting on a matrix of photodetectors, the image of a working platform of a subject surface, illuminated by the illuminator through the fiber wire, consisting of the input lens surface, an output surface and two mirrors for guiding the light from the illuminator, located in front of the entrance lens surface light wave conductors, to subject the surface through the window in the casing of the mouse.

However, the known devices have disadvantages: the speed of movement of the device over the object surface does not exceed 0.3-0.5 m/s, the power consumption of the emitter is large (~150 mW), a significant class transfer surfaces with high reflectivity excluded from working. Low speed and high power consumption associated with the optical system irradiates a too large area of the subject surface, much larger than the field of view of the photodetectors (on site ~ 100 times). This is caused by the use of oblique irradiation of the subject surface, which gives the maximum contrast of the image of the microstructure transfer surfaces of the scattering type, but leads to ambient lighting. Because of the oblique irradiation of p is a matrix of photodetectors.

The technical result of the present invention is to increase the moving speed of the cursor over the object surface, reducing energy consumption and extending the functionality of the device by using reflecting light transfer surfaces.

This result is achieved due to the fact that in the known device, accommodated in the housing of the mouse, containing a printed circuit Board including an integrated circuit sensor of the displacement vector mouse with a matrix of photodetectors and optical system containing a lens photodetector of the optical channel, projecting through a window in the casing of the mouse, the printed circuit Board and the housing of the integrated circuit, the image areas of the subject surface, the plane of the matrix of photodetectors and fiber wire having an input lens surface, the output surface and one or more mirrors for guiding the light from the illuminator, optically associated with the input lens surface light wave conductors, on the object surface through the window of the housing of the mouse, proposed:

- mirror and the output surface of the light wave conductors to perform concentric so as to cover the lens of a one-dimensional optical channel at an angle to its axis to provide the first surface;

one or more optical surfaces of the light wave conductors and photodetector of the optical channel in the optical system to perform aspherical.

In addition, the proposed input lens surface light wave conductors to perform for aspherical deviation of the rays of light from the Central region to the periphery covered with a mirror. The lens surface of the photodetector of the optical channel directed toward the subject surface, combined with the output surface of the light wave conductors and together with the mirror surface is made aspherical for collecting rays of light on the subject site, the corresponding field of view of the matrix of photodetectors, with a given uniformity of illumination, and the lens surface facing the photodetectors has an aspherical correction with respect to the lens surface, aimed at the subject site.

Additionally, over the axis of the lens photodetector of the optical channel, symmetrically with respect to the specified axis installed additional mirror, made in the form of a rectangular strip width equal to the diameter of the lens surface facing the photodetectors, and the depth of half of the specified diameter, preserving parallelism the main zerkalnogo system is installed in the sleeve with a slit and a stopper.

The above technical result is achieved by the totality of the above new features of the invention.

The speed increase is achieved by reducing the exposure time of the matrix of photodetectors, which is provided due to increase illumination of the subject site. Posted by angle around the lens photodetectors mirror directs the rays of light concentrically on the output surface of the light wave conductors, drawn to the subject surface, resulting in the radiation is focused on a small area corresponding to a field of view of the photodetectors. The gain in light (~100 times) allows, for example, to increase the operating speed of the device 100.

Reducing energy consumption is achieved by reducing the current of the emitter in proportion to the reduction of the irradiated substantive grounds. When reducing the subject site 100 times, in the same time can be decreased current transducer and accordingly the power consumption.

While increasing performance and reducing power consumption win on these parameters is divided between them. So, if the speed is increased 10 times, the power consumption can be reduced televideniya and to achieve uniformity within small areas of the subject surface, the focusing lens surface facing toward the subject surface and combining the lens surface of the photodetector of the optical channel and the output surface of the light wave conductors, is aspherical so that its periphery belonging to the output surface of the light wave conductors, has a smaller curvature than the Central part. Parameters asferico calculated from the set of non-uniformity (<20%) within a given circle (~1 mm2and given the degree of focus (<3050%) energy outside a given circle, using the well-known program "ZEMAX". Distorted lighting aspherical optical channel photodetectors resolution is aspherical second lens surface facing the photodetectors. The specific parameters of the n-th (n2) order the above aspherical surfaces are calculated on the basis of the following criteria, and the criteria specified permission lenses (20 lines/mm). These calculations can be performed, for example, using well-known program "ZEMAX" (Optical Design Program. User's Guide, Version: July, 2002. Focus Software Incorporated P. O. Box 1822 Tucson, AZ 85731-8228 USA. support@focus-software. com. www. focus-software, com).

Expansion of functional capabilities is izkuyu to the vertical direction of the illuminating rays on the specimen surface (45 to 90), in which the reflected rays fall on the photodetector. This gives you the opportunity to work with highly reflective surfaces up to the mirror.

Additional features of the invention is directed to a further improvement of the technical characteristics of the device. Aspherical deviation of the lens surface lighting light wave conductors are used for the deviation of rays of light from the Central region not occupied by the mirror and intended for photodetection optical channel to the periphery covered with a mirror. This prevents the loss of these rays, which further (~25%) reduces the power consumption of the emitter. Esferica mirror provides a collection of these rays at the subject site with the specified uniformity. The same role is played by the additional mirror located in the path of the Central ray illuminator for optical channel photodetectors. His esferica ensures that a rotated rays illuminated the space without compromising the specified uniformity.

Execution of mirrors external surfaces of the dielectric solid-state design allows it to be used to implement the invention the standard cheap plastic technology optics.

the location of the light source relative to the optical system. To achieve the required accuracy without calibration adjustments in the design of solid-state optical system from the side of the emitter is integrated sleeve for planting in her illuminator having the appropriate diameter and length.

List of graphic materials, illustrating the device implementing the invention.

Fig.1 illustrates a known device is cursor control optical mouse (prototype).

Fig.2 illustrates the proposed device is cursor control optical mouse.

Fig.2A shows transverse with respect to Fig.2 is a section of the active part of the optical system.

Fig.2B shows the projection optical system from the side of the sleeve.

Fig.2B is a variant of the active part of the optical system with a mirror.

Fig.3 - typical pattern of cell photodetector.

Fig.3A is a diagram of a cell of the photodetector with an additional transistor for subtracting the background part of the photocurrent.

Fig.3b is a diagram of the formation voltage feedback for a typical cell photodetectors.

The device is cursor control optical mouse is (see Fig.1 and 2) from the optical system 1 (1a its passive part), oriented lens surfaces 2 and 3 on the object surface 4 cereal 1 and having an integrated circuit 7 sensor displacement vector mouse with a matrix of photodetectors 8 with the optical window and the aperture 9 on the matrix of photodetectors 8, converted to the optical system 1 from the side of the lens surface 3. Lens surfaces 2 and 3 form the lens photodetector of the optical channel, projecting the image areas of the subject surface 10 on the photodetectors 8 IP 7. Lens surface: input 11 and output 2, and the mirror 12 of the optical system 1 to form a fiber wire to the rays of the light source 13 with the stop 14, tightly installed into the sleeve 15, a built-in optical system 1, which has for this purpose, the stopper 16 and section 17 (see Fig.2B). The mirror 12 in the illuminator light wave conductors concentrically covers the channel of the field of view of the lenses 2, 3 photodetection optical channel, sending beams of the light source 13 on the specimen surface. Lens surfaces 2, 3, 11 and the mirror 12 may have an aspherical correction, providing required for operation of the matrix of photodetectors 8 IP 7 uniformity of illumination of the subject site surface 10 (80%), the level of concentration on her light energy illuminator (50%) and resolution (16 lines per 1 mm). The lens surface 11 has an aspherical deviation directing rays of light from the Central area occupied by a one-dimensional optical channel is to shown in Fig.2B, beyond the axis of the lens field of view of the photodetectors 2, 3 symmetrically with respect to the specified axis in the form of a rectangular strip width equal to the diameter of the lens surface 3 facing the photodetectors 8 and the depth is half of the specified diameter, preserving the parallelism of the main mirror surface 12, and the additional mirror surface 12A provided with aspheric deviation, providing the direction of the reflected rays in the region of the subject platform 10 with the preservation of uniformity of coverage (80%).

The mirror surface 12 and 12A are made in the form of outer surfaces of the dielectric solid-state optical system 1, i.e., using the effect of total internal reflection of rays on the boundary of the optically dense medium of the optical system 1 with a refractive index 1,58 with air, if these rays are incident on the mirror at an angle51to its surface. This condition is satisfied for all incident rays of light, located, for example, perpendicular to the axis of the photodetector of the optical channel at an angle of inclination of the mirror to the optical axis of the photodetectors and emitter, equal 45. the camping and the angle of the mirror.

Additionally, integrated circuit 7 in the cells of the matrix of photodetectors 8 IP 7 can contain schema subtraction of the background part of the photocurrent, made in the form of a transistor of the current generators in the variant of Fig.3A using an additional transistor 18 to the sample circuit of Fig.3, on which the photodiode 19, having a capacitance C1 connected to integrating capacitor C2 through matching the impedances of the transistor 20, the gate of which is connected a constant voltage V01.

In this case, the voltage on the capacitor C2 is transmitted by the transistor 21 to the outlet 22 when the address signal at the input 23 of the transistor 24. This voltage at the beginning of the exposition is updated by the signal VR by turning on the transistor 25. In a variant of the model diagram of Fig.3 function of the generator current to the transistor 18 is combined with the key function of the transistor 25. Transistor oscillator current source connected to the DC bus potential VDD, the drain to the source of the photocurrent to the drain of transistor 20 and the gate bus voltage feedback VR. Voltage VR in this case is formed by the circuit shown in Fig.36. Voltage feedback V02 is transmitted to the input of the transistor 25, and it works as a generator when the value of the signal 28, is equal to “0”. When the value 13, inserted into the centering sleeve 15, emits rays of light that passes through the lens surface of the emitter and the input lens surface 11 of the optical system 1 into a parallel optical beam, the mirror 12 is rotated and fed into a lens surface 2, focusing it on the illuminated area of the subject surface 4 through technological hole in the casing of the mouse. Esferica lens surface 11 rejects the Central part of the beam to the periphery of the mirror 12 and thus includes them in the process of lighting the subject surface. Otherwise, this part of the beam (~25%) would be lost, because it would not be blocked by the mirror 12. Esferica lens surface 2 separates the output portion of the surface belonging to the light wave conductors, and the input portion of the lens surface of the photodetector of the optical channel, preventing excessive focusing of the beams on the object surface, i.e., provides on-site 10 (~1.5 mm2) uniformity80% and the concentration of energy50%. Reflected or scattered by the subject platform 10 surface-rays pass through lens surfaces 2 and 3, the aperture 9 and focus in the subject isset loss of resolution of the lens 2, 3 due to specific asferico lens surface 2 defined by the criterion of uniformity of illumination, not permission. In the variant of Fig.2B of the optical system 1, the Central part of the beam that passes outside of the mirror 12, is rotated towards the lens surface 2 and the platform 10 additional mirror 12A having asferico to obtain uniform coverage of the platform 10 at the level of80% and the concentration of radiation on it50%.

The realization of a device in accordance with the description above will increase the speed of the cursor, to reduce its energy consumption and to extend the functionality.

Cell photodetectors IP complemented by schemes subtracting the background part taken by the matrix of photodetectors 8, which is due to hit the photodetectors 8 in addition to the scattered also reflected rays from the platform 10 is significantly higher than the oblique irradiation of the subject platform 10, available in the prototype of Fig.1. So this component was not overloaded cell photodetectors 8 and ADC IP 7, processor IP 7 generates, for example, each reference frame voltage feedback V02 controlling the magnitude of the subtracted part of the photocurrent produced in the cells fadesa on the execution time of the function subtraction. In the variant of Fig.3A is a continuous time, in the variant of Fig.3 the duration of the signal subtraction and therefore the availability on the bus VR voltage feedback V02 corresponds to the time integration of the photocurrent. Switching functions subtraction and zero produces the pattern shown in Fig.36. Feeding on the bus VR cells photodetectors on the circuit of Fig.3, a zero voltage - zero function of the capacitors C2 and C1, or voltage feedback V02, calling through the transistor 25 corresponding to the subtracted current.

When you move the mouse the image of the subject surface is moved by the photodetectors 8 IP 7. In the series of frames relative to the reference frame IP 7 determines the speed and direction of movement of the mouse in the same way as it is done in the prototype.

The present description of the invention, including the composition and operation of the device, including the proposed variant of its execution, suggests further possible improvement specialists, and does not contain any restrictions in terms of implementations. All claims are formulated solely in the claims.

Claims

1. The device is cursor control optical mouse, accommodated in the housing of the mouse, with whom Ktorov and the optical system, containing the lens photodetector of the optical channel, projecting through a window in the casing of the mouse, the printed circuit Board and the housing of the integrated circuit, the image areas of the subject surface in the plane of the matrix of photodetectors and fiber wire having an input lens surface, the output surface and one or more mirrors for guiding the light from the illuminator, optically associated with the input lens surface light wave conductors, on the object surface through the window in the casing of the mouse, wherein the mirror and the output surface light wave conductors are made concentric and cover the lens photodetector of the optical channel at an angle to its axis, providing the reflected rays of light at the output surface of the light wave conductors and through it to the site of the subject surface, and one or more optical surfaces of the light wave conductors and photodetector of the optical channel in the optical system is made aspherical.

2. The device under item 1, characterized in that the axis of the lens photodetector of the optical channel symmetrically with respect to the specified axis installed additional mirror, made in the form of a rectangular strip width equal to the diameter of the lens surface facing the FD is arnosti, moreover, the surface of the additional mirrors are aspheric.

3. The device according to p. 1, wherein the input lens surface light wave conductors are made aspherical to reject the rays of light from the Central region to the periphery covered with a mirror, and the lens surface of the photodetector of the optical channel directed toward the subject surface, combined with the output surface of the light wave conductors and together with the mirror surface is made aspherical for collecting rays of light on the subject site, the corresponding field of view of the matrix of photodetectors with a given uniformity of illumination, and the lens surface facing the photodetectors has an aspherical correction with respect to the lens surface, aimed at the subject site.

4. The device according to p. 3, characterized in that the axis of the lens photodetector of the optical channel symmetrically with respect to the specified axis installed additional mirror, made in the form of a rectangular strip width equal to the diameter of the lens surface facing the photodetectors, and the depth of half of the specified diameter, preserving the parallelism of the main mirror surface, and the surface of the illuminator optical system installed in the sleeve with a slit and a stopper.

 

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