Installation to measure angular field and to monitor step size of test-object mira lines. RU patent 2521152.
 Target for tuning and determination of parameters of optical-electronic systems with matrix photodetecting devices and method of its usage / 2507494Target comprises rectangular narrow strokes arranged in parallel in a row Nvch, the width of which bVch is equal to the distance between them and is determined based on the following expression: bVch=F/f0*(m+δ), where: F - focus distance of a collimator; f0 - focus distance of a lens of the optic-electronic system (OES); m - size of a pixel of a matrix photodetecting device (MPDD); δ - a value, which is less than the size of the pixel multiple times and is equal: 0.01*m<δ<0.1*m. The number of narrow strokes Nvch≥is 2m/δ, and their height is h≥F/f0*5m. The target comprises at least one wide stroke arranged on the line of narrow strokes Nvch at its edges, such as NNch along the height equal to the height of narrow strokes Nvch, and along the width BnCh=(5…10)*bVch. The method includes formation of an actual image of the target in the plane of the MPDD, reproduction of a signal from narrow and wide strokes, according to which they perform mutual matching of the MPPD plane, the focal plane of the OES lens and the plane of the actual image of the target. The image from narrow and wide strokes is aligned along the direction of the line of MPPD pixels. They measure characteristics of the signal from narrow and wide strokes and determine the quality of OES tuning and its parameters. |
 Device and method to process images, and software / 2494460Modules from a module 23 for calculation of a quantitative index of blur extent to a module 27 for calculation of a quantitative index of colour intensity withdraw the quantitative value of the specified characteristic from the input image, and the quantitative index is calculated using a separately taken characteristic, which characterises assessment of the input image on the basis of this characteristic. Thus, the module 24 for calculation of the quantitative index of brightness withdraws characteristics and the brightness value as a quantitative value from the input image, and calculates the quantitative index of brightness, which characterises assessment based on distribution of brightness value in the area occupied by the object, in the input image. The module 28 for calculation of the total quantitative index calculates the total quantitative index on the basis of each quantitative index of separately taken characteristics, and this total index characterises assessment of image fixation condition for the input image. |
 System for measuring characteristics of optoelectronic devices / 2484438System has an illuminator, a test object, spatially spaced apart light-sensitive sensors mounted in the plane of the test object and connected to an illumination control device which is connected to the illuminator. The test optoelectronic camera device is connected to a data processing system which is connected to the illumination control device. The object plane of the lens of the test optoelectronic camera device coincides with the plane of the test object. The illumination control device is configured to vary the level of illumination of the test object and control its uniformity by sending a corresponding control signal to the illuminator, correcting the control signal in accordance with a feedback signal from the light-sensitive sensors and measuring the real steady-state value of the level of illumination of the test object. The test device captures an image of the test object and transmits the captured data to the data processing system which determines characteristics of the test device based on the captured data and values of the level of illumination of the test object. |
 Apparatus for measuring characteristics of radiation receivers / 2439597Apparatus has a collimator with a test object in its focal plane, the output of which is connected to the input of the radiation receiver, a video viewing device, an oscilloscope and a synchronisation and control panel. The oscilloscope is a double-beam oscilloscope. The output of the radiation receiver is connected to the input of the synchronisation and control panel and the input of the first channel of the oscilloscope. The first output of the synchronisation and control panel is connected to the input of the video viewing device. The second output of the synchronisation and control panel is connected to the input of the second channel of the oscilloscope. |
 Method and device for permanent monitoring of selected condition of tv channel / 2254689Method and device can be used for determining format of video image actually reproduced on TV screen. Signal from remote control signal is received and identified and channel which has to be received by TV set is determined. Tuned condition of channel of channel reference selector is checked to put in coincidence the sonic signals from reference channel selector and loud speaker of TV set. Reference channel selector is capable of extracting sonic signal of single random predetermined number of channels. |
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Target for tuning and determination of parameters of optical-electronic systems with matrix photodetecting devices and method of its usage / 2507494 Target comprises rectangular narrow strokes arranged in parallel in a row Nvch, the width of which bVch is equal to the distance between them and is determined based on the following expression: bVch=F/f0*(m+δ), where: F - focus distance of a collimator; f0 - focus distance of a lens of the optic-electronic system (OES); m - size of a pixel of a matrix photodetecting device (MPDD); δ - a value, which is less than the size of the pixel multiple times and is equal: 0.01*m<δ<0.1*m. The number of narrow strokes Nvch≥is 2m/δ, and their height is h≥F/f0*5m. The target comprises at least one wide stroke arranged on the line of narrow strokes Nvch at its edges, such as NNch along the height equal to the height of narrow strokes Nvch, and along the width BnCh=(5…10)*bVch. The method includes formation of an actual image of the target in the plane of the MPDD, reproduction of a signal from narrow and wide strokes, according to which they perform mutual matching of the MPPD plane, the focal plane of the OES lens and the plane of the actual image of the target. The image from narrow and wide strokes is aligned along the direction of the line of MPPD pixels. They measure characteristics of the signal from narrow and wide strokes and determine the quality of OES tuning and its parameters. |
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System for measuring characteristics of optoelectronic devices / 2484438 System has an illuminator, a test object, spatially spaced apart light-sensitive sensors mounted in the plane of the test object and connected to an illumination control device which is connected to the illuminator. The test optoelectronic camera device is connected to a data processing system which is connected to the illumination control device. The object plane of the lens of the test optoelectronic camera device coincides with the plane of the test object. The illumination control device is configured to vary the level of illumination of the test object and control its uniformity by sending a corresponding control signal to the illuminator, correcting the control signal in accordance with a feedback signal from the light-sensitive sensors and measuring the real steady-state value of the level of illumination of the test object. The test device captures an image of the test object and transmits the captured data to the data processing system which determines characteristics of the test device based on the captured data and values of the level of illumination of the test object. |
 Method of determining photographic camera resolution and set of circular marks for realising said method / 2461854Method involves obtaining an image of one perspective and scale using a set of circular marks with the entire image field being filled by each mark. Images of marks with different width of dark rings are selected such that the width of dark rings lies in an interval bounded on one side by the minimum width of rings which are still distinguishable on the entire image field, and on the other side by the maximum width of rings in the image of the mark, already undistinguishable on the entire image field. The resolution for regions of selected images, where dark rings of marks are distinguishable, are determined from the width of the dark ring of the mark on the image. The resolution of the photographic camera on the entire image field is obtained by merging regions with different resolution into one image. The set of circular marks consists of 30 circular marks, each being a system of concentric rings on a light background, wherein the width of the dark ring within one mark is constant and falls from each previous mark, starting from the first to the last, on a geometric progression law with ratio K which lies in the range of 0.91-0.95. |
 Method of determining photographic camera resolution and set of circular marks for realising said method / 2461853Method involves obtaining a digital image of one perspective and scale using a set of circular marks, having reference circles, with the entire image field being filled by each mark. Exact positions of the centres of the reference circles and the mark in each of the obtained images and the width of the dark ring on the image of the mark dim are determined through the width of the dark ring on the mark and the ratio of distances between centres of reference circles on the image of the mark and on the mark. Resolution of the photographic camera in each point of the image is determined from the resolution of that mark, the minimum width of the dark ring of which is still distinguished in that point of the image using a criterion of discrimination of the ring of the mark in the point of the image. The set of circular marks consists of 30 circular marks, each being a system of concentric dark rings on a light background with an constant width of the dark ring within one mark, but falling from each previous mark, starting from the first to the last on a geometric progression law with a ratio K lying in the range of 0.91-0.95. There are two oppositely lying reference circles in the structure of each mark. |
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Method of analysing deflection from plane / 2453885 Invention relates to projectors. In compliance with proposed method, film-strip with footage with minor details is glued to form a ring. Projection lens drive moving lens along optical axis is furnished with scale to allow for displacement along said axis. Said ring is scanned on screen to mark focusing points on image with minor details in, at least, three horizontal lines at, at least, five locations. Scale readings for points are taken to plot family of topographic diagrams of film-strip deviation from plane in film aperture. |
 Optical system calibration method / 2381474Method of calibrating an optical system is based on comparing the image of a calibration object obtained using the said system with the object itself. A digital virtual calibration object resembling a speckle pattern and filled with random information is created, where the linear dimension of the image of the information element of the calibration object is not less than 3 pixels of the reception matrix. The virtual calibration object is then transferred to plane surface and its digital image is obtained using the tested optical system. A correlation method is used to compare intensity distribution in the digital image and in the digital virtual calibration object, brought into view in accordance with its digital image through projective transformations. The two-dimensional matrix of position displacements of points of the said digital image relative the digital virtual calibration object is determined. |
 Interferometer for monitoring telescopic systems and objective lenses / 2518844Interferometer has a monochromatic light source and series-arranged afocal system for forming an expanded parallel light beam, a plane-parallel beam splitter oriented at an angle to the parallel light beam, a first plane mirror with a reflecting coating facing the plane-parallel beam splitter and configured to change the angle of inclination to the parallel light beam passing through the plane-parallel beam splitter, a second plane mirror configured to change the angle of inclination, and a recording unit placed in the beam of light reflected successively from the first plane mirror and the plane-parallel beam splitter, and having a focusing lens and a photodetector. The second plane mirror is placed between the afocal system and the plane-parallel beam splitter, and its reflecting coating has low transmission and faces the reflecting coating of the first plane mirror. |
 Method of evaluating spectacle lens, method of designing spectacle lens and method of manufacturing spectacle lens / 2511711Invention relates to ophthalmology and is aimed at facilitating uniform evaluation of spectacle lenses across the entire binocular field of vision, quantitative evaluation of fusion conditions, which is characteristic of binocular vision, which is enabled due to that an optical system is defined using a coordinate system in which the origin is located at the middle point of the centres of rotation of both eyeballs, and the object is accurately defined by the visual direction from the origin. The reference value of the angle of convergence is calculated using visual axes of visual directions to the object which is located at the intersection of visual axes after passing through structural base points of the spectacle lenses. The angle of convergence is calculated between the visual axes passing through spectacle lenses and continuing to the object point of evaluation in a given visual direction, and aberration of convergence is calculated from the difference between the angle of convergence and the reference value θCH0 of the angle of convergence. |
 Method of evaluating spectacle lenses, method of designing spectacle lenses, method of manufacturing spectacle lenses, system for manufacturing spectacle lenses and spectacle lens / 2511706Invention relates to ophthalmology and is aimed at making spectacle lenses, use of which reduces discomfort and fatigue, which is provided due to that when designing spectacle lenses, positive relative convergence, negative relative convergence, positive relative accommodation, negative relative accommodation and vertical fusional vergence, which are individual measurement values relating to binocular vision, are determined as relative measurement values; at least one or both of positive relative convergence and negative relative convergence are included in the individual relative measurement value, wherein the method involves determining optical design values for spectacle lenses by optimising binocular vision using as an estimation function for optimisation, a function obtained via summation of binocular visual acuity functions which include relative measurement values as factors in corresponding estimated object points. |
 Method to monitor parameters of optic-electronic systems in working range of temperatures / 2507495Method is based on generation of an image of calibrated sources of radiation (targets) in the plane of a matrix photodetecting device (MPPD), reproduction of the produced video information in one of television standards and measurement of signals at the outlet of optic-electronic systems (OES). In process of measurements the OES is fixed to a turnstile, and the "OES-turnstile" system is placed into a thermal chamber. The image of the target is moved in the MPPD plane due to inclination of the OES sighting line in the vertical plane and rotation of the "target-collimator" system in the horizontal plane. The number of target strokes is set as sufficiently high (more than 50 strokes). Besides, an additional pair of strokes is added into the target with low spatial frequency. The spatial resolution of OES is determined by comparison of amplitudes of pulses at low and high spatial frequencies. |
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Target for tuning and determination of parameters of optical-electronic systems with matrix photodetecting devices and method of its usage / 2507494 Target comprises rectangular narrow strokes arranged in parallel in a row Nvch, the width of which bVch is equal to the distance between them and is determined based on the following expression: bVch=F/f0*(m+δ), where: F - focus distance of a collimator; f0 - focus distance of a lens of the optic-electronic system (OES); m - size of a pixel of a matrix photodetecting device (MPDD); δ - a value, which is less than the size of the pixel multiple times and is equal: 0.01*m<δ<0.1*m. The number of narrow strokes Nvch≥is 2m/δ, and their height is h≥F/f0*5m. The target comprises at least one wide stroke arranged on the line of narrow strokes Nvch at its edges, such as NNch along the height equal to the height of narrow strokes Nvch, and along the width BnCh=(5…10)*bVch. The method includes formation of an actual image of the target in the plane of the MPDD, reproduction of a signal from narrow and wide strokes, according to which they perform mutual matching of the MPPD plane, the focal plane of the OES lens and the plane of the actual image of the target. The image from narrow and wide strokes is aligned along the direction of the line of MPPD pixels. They measure characteristics of the signal from narrow and wide strokes and determine the quality of OES tuning and its parameters. |
 Method to determine place of optical fibre damage / 2503939Control and current polarisation characteristics of backscattering of optical fibre are measured. When measuring the current characteristic with the help of a polarisation controller they vary the condition of polarisation of optical radiation at the inlet of optic fibre, and coefficients of correlation of reference and current polarisation characteristics are calculated along the length of optic fibre. According to the produced characteristics, a section with damage is defined as the section, in which the correlation coefficient varies by the value exceeding the threshold value. The distance to the place of damage is determined as the distance to the point of crossing of characteristics of variation of correlation coefficient of reference and current polarisation characteristics of backscattering along the length of optic fibre under maximum value of correlation coefficient at near and far end, accordingly. |
 Method to measure parameters of retroreflexion / 2497091Method includes illumination of a sample, registration of reflected radiation, averaging of measurements in different points of the sample. Angles of sample illumination are selected, based on angles of observation: βi=αi/2, where αi - angle of observation of the i photodetector, including αi=0. The first measurement is carried out at α=0 and β=0, half-width w is assessed in the indicatrix of diffusion I(α) at β=0 by the level 0.1 from the maximum value. The angle of scattering βi is changed by βi+1, and registration of averaged values is continued, until in the range from α=0 to α=2βw distribution I(α) becomes double-modal with local minimum with the value of less than 15%-20% from the value 0.5·(I(α=0, β=0)+I(2βw)). The type of the indicatrix of diffusion is defined relative to the direction of mirror reflection I(α-2β) and is approximated with the function fA(x), where x=α-2β. Intensity values are defined in the direction of mirror reflection Im(β), and this function is approximated in the range from β>w/2 (or 15°) to 45° by the function IA(β). Extrapolation IA is carried out (β) into the area β<w/2, and the value IA is determined (β=0). The retroreflexion and the diffusion components are defined as the difference of the following: Ii=I(α=0, β=0) - IA(β=0); for the non-zero (standard) angle βs is calculated as: Ii=I(α=0, β=βs)-fA(βs)·IA(βs). If Ii(β=0)<<Ia(β=0), then the investigated sample does not have the true retroreflexion. |
 Method of selecting multimode optical fibre with single-mode optical transmitter for multimode fibre-optic transmission line / 2496236Multimode fibre-optic transmission line is probed with a test sequence of optical pulses to select a multimode optical fibre with a single-mode optical transmitter. For sets of values of parameters of standard optical radiation sources of an optical transmitter, standard values of parameters of mismatch at the input and standard values of parameters of the refraction index profile of multimode optical fibres for a given length of the transmission line, a set of standard pulse characteristics of the multimode fibre-optic transmission line is calculated, from which the set of patterns of filter characteristics for electronic compensation of dispersion is determined. The characteristic is then controlled by sorting the set of patterns, and a multimode optical fibre with a single-mode optical radiation source for the multimode fibre-optic transmission line is selected if at least, with one pattern of the filter characteristic for electronic compensation of dispersion, the controlled reception quality parameter of the test sequence lies within a given range. |
 Method for interferometric control of image quality and distortion of optical systems at operating wavelength / 2491525Method involves generating radiation at operating wavelength using an interferometer in form of a homocentric beam of rays, the centre of which is a test object which is superposed with the object plane of the analysed lens. After passing through the analysed lens, the beam of rays is reflected from a counter-mirror which enable beams to fall on a normal and return through the lens to the interferometer where the beam of rays is combined with the reference wave front of the interferometer and a fringe pattern is recorded. Distortion of the wave front of the beam of rays that has passed through the lens twice is determined, wherein the position of the centre of the beam of rays formed by the interferometer and the counter-mirror for each separate point of the field is determined. When determining wave aberrations and distortion on the entire image field and focal depth, said cycle of operations is repeated for multiple required mutually coordinated positions of the interferometer and the counter-mirror. |
 Collimator / 2489744Collimator has a lens, a test object lying in the focal plane of the lens and a test object illuminating system. The test object is a system of conductors that are connected to a stabilised current source and form at least one cross in the field of view. The illumination system is a transparent plate with a dull central area, lying immediately behind the test object and illuminated by a source of visible light, e.g. a light-emitting diode. The cross in the field of view projects beyond the boundary of the dull area. Each of the conductors of the test object can be connected to its own section of the stabilised current source, said sections having no galvanic coupling. |
FIELD: measurement equipment.
SUBSTANCE: installation comprises a collimator with a test-object, a monitored item and a measuring unit. The test-object is made as a cross hair and rigidly fixed in the focal plane of the collimator. The monitored item is made as television or thermal imaging one, its radiation detector is set in the focal plane of the lens of the monitored item. A flat mirror able of rotating around the vertical axis is installed between the collimator and the monitored item. The collimator output via the flat mirror is connected to the monitored item lens. The measuring unit comprises a panel for synchronisation and formation of line illumination pulse and two margin pulses, a double-beam oscillograph and a video monitor. The monitored item output is connected to the input of the first channel in the double-beam oscillograph and to the input of the panel for synchronisation and formation of line illumination pulse and two margin pulses, while the first output of the latter is connected to the video monitor input. The second output of the said panel is connected to the input of the second channel in the double-beam oscillograph.
EFFECT: improved reliability of the obtained results, increased information value and monitoring accuracy, possibility to monitor and define test-object parameters in the form of miras with vertical and horizontal lines.
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The invention relates to the measuring engineering and is intended for measurement of parameters television (thermal imaging cameras.
The well-known technique to determine the field of view of the TV camera (Vlado our Damjanovski CCTV "the Bible surveillance." Digital and network technologies, ed. - 2nd. Translation from English. M OOO "ay-es-es of the Press". 2006 C.-79), according to which a rectangular test-object format 4:3 to be entered into a raster television cameras (receiver radiation) and formula £=2arctg (W/2d) defined angle azimuth, where W is the width of the test object, d is the distance from the television camera to the test object. To determine the magnitude of the field of view in elevation -? instead of W to use the h - the height of the test object. The main disadvantage of this method is the necessity of giving the test-object in raster television camera, and that can only be done on the target distance, on which the angular field of view is conditional characteristic. This is because the rays coming from the individual point of the field of view in the centre of the lens of a television camera (main rays points), are from the optical axis of a different angle than the rays coming from the same point in the peripheral point of the pupil. When the plane items from infinity, the question of angular field of view is certain, because the main rays are parallel to other rays from the same point of the field of view, going to any point of the pupil, and the angle between the ray and the optical axis remains constant whatever the position of the center of the pupil relative to the plane of subjects. The magnitude of the field of view is determined by the size of the field diaphragm - D, located at the rear focal plane of the system, to the focal length f of this system (IV Sakin. Engineering optics". Leningrad mechanical engineering Leningrad branch 1976, P.84-85).
Closest to the proposed technical solution is the installation for measurement of visual field telescopic systems (Russia, copyright certificate №1654708 A1, IPC G01M 11/00, published 07.06.1991 year), which contains a light source, the condenser and the collimator, consisting of a lens, in focal plane which is an opaque screen with narrow vertical slot (test object)moving perpendicular to the optical axis of the system by electric motor. For controlled telescopic system is the measuring unit, consisting of a lens, the position-sensitive sensor, processing and indication unit and tsifropechatayuschee device. The disadvantages of this device is the lack of visual control provisions cracks within the boundaries of the field of view, the limited functionality such as measurement of visual field in elevation in the case of rectangular aperture in telescopic system, the inability to determine the field of view of television cameras.
The challenge for the proposed technical solution is the improved performance of the installation.
The technical result - increase of reliability of measurement, increasing the information content and accuracy of control, and the ability to control parameters of test-objects in the world with horizontal and vertical lines.
This is achieved by installation for measurement of angular field of view and control of the step value lines worlds test object containing the collimator with the test object in the focal plane, controlled article containing the lens, and the measuring unit, including the position-sensitive receiver of radiation, in contrast to the known, the test object is made in the form of the cross, and rigidly mounted in the focal plane of the collimator, controlled product made for television (thermal)radiation detector, which is located in the focal plane of the lens, between the collimator and the controlled product flat mirror mounted with the possibility of rotation around the vertical axis, the yield of the collimator through flat mirror is connected to the input of the controlled product, but with the lens, and in the measuring unit entered remote synchronization and formation pulse illumination of the line and two border pulses, dual beam oscilloscope, video monitor, and the output of the test object is connected to the input of the first channel dual beam oscilloscope and with the input of the remote synchronization and formation of the pulse illumination of the line and two edge of the pulse, the first output of the remote synchronization and formation of the pulse illumination of the line and two border impulses connected to the input video monitor, and the second output of the console is connected to the input of the second channel dual beam oscilloscope.
The invention is illustrated by drawings, where figure 1 shows a block diagram of installation for measurement of the visual field. Figure 2 shows the test-object, as figure 3 shows the test object with vertical and horizontal lines.
Device for measuring angular field of view and control of the step value lines worlds test object (figure 1) contains the collimator 1, in the focal plane of which is rigidly fixed to the test object (figure 2), flat mirror 2, controlled article 3 in view of television cameras, containing the lens to the focal plane of which is placed the receiver of radiation television (thermal imaging) type (Fig. not shown), two-beam oscilloscope 4, remote synchronization and formation of the pulse illumination line and boundary pulses (PCIPI) 5, monitor 6, the yield of the collimator 1 through flat mirror 2 is connected to the input of the tested part 3, but with the lens, and the output of the controlled products 3 thermal imaging (televizionnogo) type is connected to the input PCIPI 5 and with the input of the first channel dual beam oscilloscope 4, the first PCIPI 5 is connected to the input video monitor 6, the second output PCIPI 5 - input of the second channel dual beam oscilloscope 4. Depending on the type of radiation receiver (TV or thermal) and is determined by the type of the collimator. Introduction PCIPI 5 block diagram of installation allows to form two boundary of impulse and momentum of the illumination of rows selected by the operator on the screen of the video monitor 6 or waveform that is necessary to control the desired option. These impulses are entered in the video output of the receiver of radiation television (thermal imaging) type and pulse illumination of the strings fed to the input of the second channel dual beam oscilloscope 4, triggering it. This uniquely determine the membership of the signal oscillogram of the first channel dual beam oscilloscope 4 to the video of the selected row on the screen of the video monitor 6 requires that the video of the selected row and momentum of the illumination of this line on the waveforms of two channels douchegel oscilloscope 4 were one under another. The value of the vision field of the radiation receiver TV (thermal imaging) camera is determined by the angle of turn of flat mirrors 2 around its vertical axis.
Figure 2 shows the test object in the form of a cross in 4:3 format with the point About at the point of intersection of lines that is used to determine the magnitude of the field of view of radiation receiver TV (thermal imaging cameras.
Figure 3 shows the test object with vertical and horizontal lines, often used to determine the resolution of photodetectors. Calculated such test objects with account of the focal length and field of view controlled television (thermal imaging) camera and the focal length of the collimator.
Video on the first output of the remote synchronization and formation of the pulse illumination of the line and two border impulses 5 consists of a television signal generated by the radiation receiver TV (thermal imaging) type and pulse illumination line and boundary pulses. The position of the boundary of pulses relative to the beginning and end of each line of the frame (frame) is changed using the control knobs located on the top panel 5. This pane contains radio buttons for selecting non illuminated line. The proposed installation allows with a high accuracy to measure visual field tested part 3 TV (thermal imaging) type, which is defined by the scale of turning flat mirror 2 around its vertical axis. And lets in the process of testing to check settings on (step vertical and horizontal lines worlds in the corner least) used test object (figure 3) and to obtain reliable values of the resolution of the test radiation detector television (thermal imaging) type, despite the fact that the parameters used to test the test-object were unknown or installation for measurement of the resolution of the radiation receivers TV type was not provided conjugation plane of the test facility, located in the focal plane of the collimator, with the plane of the photosensitive element (matrix) radiation detector television (thermal imaging) type.
To illustrate the operation of this installation the following is the method of definition of the field of view of the monitored articles 3, made in the form of television (thermal imaging) cameras, as well as the method pitch control the world in the image of test-objects (figure 3) with vertical and horizontal lines, designed for television (thermal imaging cameras with different focal lengths, and if not provided with the mate plane of the location of the test object with the plane of the location of a photosensitive element (matrix) radiation detector television (thermal imaging) type.
Measurement of visual field tested part 3 in azimuth is as follows. On the collimator 1 set the value of the temperature difference (light), providing a clear observation of video impulse points On the waveform allocated line, passing through this point. Collect dimension diagram (figure 1). Flat mirror 2 and controlled item 3 with the radiation receiver is positioned so that the plane of the location of a photosensitive matrix receiver of radiation and the plane of the arrangement of the test object (figure 2) in the focal plane of the collimator 1 were associated. During this operation, the starting angle flat mirrors 2 should stand on zero level, which is located in the middle of the scale of turning flat mirror 2. On the screen of the video monitor 6 get the image of the test object (figure 2), establish the arrow turning flat mirror 2 at zero scale divisions, then turn the whole structure of flat mirrors 2 get the image of a point On the test-object (figure 2) in the Central part of the screen of the video monitor 6, highlight the line passing through point On, and turning your body flat mirrors 2 set on the oscillogram of the video impulse point About in the middle of the selected row, with arrow turning flat mirror 2 must be at elevation zero. Then turn the flat mirrors 2 around the vertical axis shift the video points On the waveform of the selected row to the left to fit it with the beginning of the active part of the selected row and mark on a scale of turning flat mirror 2 degrees £ l . Likewise determine the angle flat mirrors 2 £ p , need to match the video impulse point About from the zero-scale value turning flat mirror 2 to coincide with the end of the active part of the selected row. Angle of radiation receiver azimuth will is $ = (£l the " + " p )·2.
To measure the visual field of radiation detector test object 3 in elevation β have controlled article 3 rotate 90 degrees counter clockwise position in the measurement of the angle azimuth and secure controlled article 3 on the bracket into position. To install the arrow scale turning flat mirror 2 to zero and turn the whole structure of flat mirrors 2 to achieve placing the image point On in the Central part of the screen of the video monitor 6, move the highlight bar located at the very beginning of the video monitor screen 6 and turning flat mirror 2 around its axis to adjust the image point On to the selected line. On the oscillogram of the selected row should see a video of the point O. Reducing the number of the selected row and changing the duration of the scan dual beam oscilloscope 4, get on the oscillogram of the signal front pulse quenching fields, followed by the initial lines. Continue turning flat mirror 2 in the same direction as long as the video's point About not disappear with the oscilloscope of the selected row. The angle of rotation of flat mirrors 2, which was last seen video of a point On, to take over the top border of an angle on the angle of elevation β century
For determination of the lower boundary of the field of view of the tested part 3 with a radiation detector in elevation β n is necessary, as in the case of determination β in , set the arrow on the scale of turning flat mirror 2 to zero, to control the placement of the image point On in the Central part of the screen of the video monitor 6, select row, held at the end of the video monitor screen 6 and turning flat mirror 2 around its axis to adjust the image point On dedicated line, while on the oscillogram of the selected row should see a video of the point O. Increasing the number of the selected row and changing the duration of the scan dual beam oscilloscope 4, get on the oscillogram of the signal back extinguishing pulse of the same, as in the case when determining β in , fields and before him last rows of the same fields. Continue turning flat mirror 2 in the same direction as long as the video's point About not disappear on the oscillogram of the selected row. The angle of rotation of flat mirrors 2, which was last seen the video impulse point On, to take over the lower angle on the angle of elevation β N. The angle of the field of view of radiation receiver in elevation will be equal & beta=(? +β n )·2.
This setting allows you to define a value of reduction of the field of vision TV (thermal imaging) systems for monitoring the situation on the screen of the video monitor in comparison with the field of view of radiation receiver of these systems. For this purpose it is necessary to PCIPI 5 enable the driver edge of pulses and using variable resistors on the top panel PCIPI 5 to set the boundary line on the left and right edges of the screen of the video monitor 6. In measuring field of view of radiation detector test object 3 azimuth angle at the image point On the test-object (figure 2) left side of the screen of the video monitor 6 to mention the angles of the £ e on a scale of turning flat mirror 2, do the same thing when reaching the image point On the right edge of the screen of the video monitor to mark on a scale of rotation of the mirror angle £ EP. The angle of the field of view in azimuth television (thermal imaging) system is $ e =(£ e the " + " EP )·2. At the very beginning of establishing the value of the vision field of the radiation receiver in elevation β in , when it highlighted the extreme top line on the screen of the video monitor 6, turning flat mirror 2 around its axis to the left until then, until the image points Of overlap with the top line on the screen of the video monitor 6, mark angle beta of EV scale turning flat mirror 2.
At the very beginning of establishing the value of the vision field of radiation detector test object 3 in elevation β n when it is already highlighted at the bottom line on the screen of the video monitor 6, turning flat mirror 2 around its axis right up until the image point On will be aligned with the bottom line on the screen of the video monitor to mention the angles of the β EN scale turning flat mirror 2. The value of the vision field imaging (television) system in elevation equal β e =(? EV +β EN )·2. The decreasing value of the vision field of television (thermal imaging) system in comparison with the field of view of its detectors of radiation angle azimuth is Δ£= " - these£ uh , and in elevation Δβ=β -? e .
The control parameters of the test object (figure 3)that is used to determine the resolution of the tested part 3, is made in his image as follows. First, with high precision determines the magnitude of the field of view of radiation receiver kontroliruemoi television (thermal imaging) camera, and the angular size of the visual field attributable to the group vertical or horizontal lines image worlds test object (figure 3), which is determined by the resolution of the radiation receiver on the azimuth angle (angle). The angular size of a group is a vertical lines Δ£ GW on the image worlds is determined by the formula
Δ £ GW = £ x t GW t azwhere " - these are the angle of the receiver of radiation imaging (television) system in azimuth;
t az - the duration of the active part of the line;
t HS - duration group vertical lines worlds test object, which is measured on the oscilloscope screen 4 in the selection mode of the line.
The angular size of a single period (step) image vertical lines for the group the test object is equal Δ£ GWT /n=Δ.,
where n is the number of periods in the group's vertical lines worlds test object.
Angular value Δβ - group of the horizontal lines of the test object is determined by the formula
Δ β g . g . = β x t g to T and to , where?- angle of radiation receiver TV (thermal imaging) camera in elevation;
T AK - duration of the active part of the frame (frame);
t GK =t z (N n N - the length along the frame of the group of horizontal lines worlds test object that is used to determine the resolution of the radiation receiver TV (thermal imaging) cameras along the frame;
t z - period horizontal receiver radiation;
N, n ,N - number of rows that match, respectively, with upper and lower edges of the selected group of lines worlds test object.
To determine N n it is necessary to select the line that ends with a selected group of horizontal lines, to clarify the waveform position the highlighted lines in the bottom of the selected group of horizontal lines of the test object (the last line of the video signal at the receiver output radiation, which has the video signal from the horizontal line worlds, should be on the location of the synchronous pulse generator line on the oscillogram of the second channel dual beam oscilloscope 4) and notice to PCIPI 5 room this line N n .
To determine N it is necessary to highlight the line that starts the selected group of horizontal lines of the test object, the waveform to clarify the position of the selected row from the front edge of the selected the group of horizontal lines of the test object (the first line from the video output of the receiver of radiation, which has the video signal from the selected group of horizontal lines should be on the location of the synchronous pulse generator line on the oscillogram of the second channel dual beam oscilloscope 4) and notice to PCIPI 5 room this line N .
The angular size of a single period (step) horizontal lines used groups of test-objects are equal Δ SHG. =Δβ, /n, where n is the number of periods in the group of horizontal lines worlds test object.
Thus, the obtained effect in terms of reliability and accuracy of measurements due to the possibility to compare observed on the screen of the video monitor image of the test object and its elements with the relevant parts of the video test object, using the capabilities of a two-beam oscilloscope (ranges of change of duration and amplification), increase the accuracy of measurements. The proposed installation allows to measure in two directions value of the vision field separately as detectors of radiation television (thermal imaging) type and usage-based TV system video monitor.
With the help of the proposed device allows you to control and to determine the magnitude of the angular step of the bands ruled the world of test-objects, if the value of this option is unknown or in the installation for measurement of the resolution of the detectors of the TV type is not provided with a link to the plane of the test facility, located in the focal plane of the collimator, with the plane of the photosensitive element (matrix) radiation detector TV type.
Device for measuring angular field of view and control of the step value lines worlds test object containing the collimator with the test object in focal plane, controlled article containing the lens, and the measuring unit, including the radiation receiver, wherein the test object is made in the form of the cross, and rigidly mounted in the focal plane of the collimator, controlled product made for television (thermal)radiation receiver which is located in the focal plane of the lens, between the collimator and the controlled product flat mirror mounted with the possibility of rotation around the vertical axis, the yield of the collimator through flat mirror is connected to the input of the controlled products, namely lens, and in the measuring unit entered remote synchronization and formation of the pulse illumination of the line and two border pulses, dual beam oscilloscope, video monitor, and the output of the test object is connected to the input of the first channel dual beam oscilloscope and with the input of the remote synchronization and formation of the pulse illumination of the line and two edge of the pulse, the first output of the remote synchronization and formation of the pulse illumination of the line and two border impulses connected to the input video monitor, and the second output of the console is connected to the input of the second channel dual beam oscilloscope.