CN205157167U - Multispectral integrated target of high accuracy of LED illumination - Google Patents
Multispectral integrated target of high accuracy of LED illumination Download PDFInfo
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- CN205157167U CN205157167U CN201520936521.8U CN201520936521U CN205157167U CN 205157167 U CN205157167 U CN 205157167U CN 201520936521 U CN201520936521 U CN 201520936521U CN 205157167 U CN205157167 U CN 205157167U
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Abstract
The utility model provides a multispectral integrated target of high accuracy of LED illumination. Multispectral integrated target includes multispectral integrated target plate, the controllable LED light source of electric current and collimating system, the focal plane department at collimating system is installed to multispectral integrated target plate, and the controllable LED light source of electric current is used for providing the illumination of infrared and white shimmer for multispectral integrated target plate, collimating system is the cassegrain collimating system through aberration optimization, tolerance tolerance analysis and thermal design, the resolution ratio of cross division line and the four kinds of differences of having integrateed on the multispectral integrated target plate detects the pattern. The utility model discloses combine multispectral integrated target plate and the controllable LED light source of electric current, need the frequent problem of changing, relapseing timing target plate and light source in having overcome a target special use, adopt the cassegrain collimating system through aberration optimization and thermal design, optimized the image quality, reduced the volumic mass of system to there are great tolerance allowance and higher temperature adaptation nature in the messenger system.
Description
Technical field
The utility model relates to many plain shaft parallelisms and detects and resolution detection, the specifically multispectral integrated target of a kind of high precision of LED illumination.
Background technology
At present, optoelectronic device, gradually to the development of multispectral, integrated direction, is usually integrated with white light, low-light and the multiple detection means such as infrared in an equipment.This kind equipment in use, needs to carry out the calibration of multi-spectrum light axis collimation and resolution detection.Detect for multi-spectrum light axis collimation, measured by cross division line in existing mode, both can by illumination generation cross division line respectively, also incandescent lighting can be utilized to change the infrared target plate of white low-light more respectively generate, which kind of situation all very easily produces optical axis imbalance, affects accuracy of detection.If the resolution also will carrying out white low-light and infrared light detects, then need to change, calibrate target plate, cause complex operation, inefficiency.And micro-illumination and infrared target and the background temperature difference are difficult to control during incandescent lighting, the out of focus equal error factor can be introduced when the more important thing is and change target plate, and high being not easy to of cost is promoted the use of.
Utility model content
The purpose of this utility model is just to provide a kind of multispectral integrated target of high precision of LED illumination, and this integrated target can be used in white low-light and infrared many plain shaft parallelisms detect and resolution detects.
The purpose of this utility model is achieved in that the multispectral integrated target of a kind of high precision of LED illumination, comprises multispectral integrated target plate, controlled current flow LED light source and Cassegrain's colimated light system; Described multispectral integrated target plate is arranged on the focal plane place of described Cassegrain's colimated light system, and described controlled current flow LED light source is used for providing infrared and white low-light to throw light on for described multispectral integrated target plate;
Described Cassegrain's colimated light system comprises lens barrel and the primary mirror that is arranged in described lens barrel and secondary mirror;
Described multispectral integrated target plate comprises circular target plate, and described circular target plate is carved with cross division line, the center being centrally located at described circular target plate of described cross division line, and described circular target plate is divided into four quadrants by described cross division line; Different resolution check pattern is carved with respectively in four quadrants of circular target plate;
Resolution check pattern in first quartile is made up of four groups of lines, has four equally spaced lines in each group; In four groups of lines, first group of lines is vertical moulding, and this group is positioned at the upper left corner; Second group of lines is ledgement, and this group is positioned at the lower right corner; 3rd group of lines and first group of lines are 45 ° of angles, and this group is positioned at the lower left corner; 4th group of lines and first group of lines are 45 ° of angles, and vertical with the 3rd group of lines, and this group is positioned at the upper right corner;
Resolution check pattern in second quadrant is identical with the resolution check pattern in first quartile, but both resolution is different;
Resolution check pattern in third quadrant is the four bar target patterns that the vertical moulding equidistant by four, the ratio of width to height is 1:7 is formed;
Resolution check pattern in fourth quadrant is made up of two groups, left and right lines, has three equally spaced lines in each group; Being vertical moulding in left group, is ledgement in right group.
The line length of described cross division line is 22mm, and width is 0.5mm; Line thickness in resolution check pattern in first quartile is 0.16mm; Line thickness in resolution check pattern in second quadrant is 0.08mm; Line thickness in resolution check pattern in third quadrant is 0.25mm, is highly 1.75mm; Line thickness in resolution check pattern in fourth quadrant is 1mm.
Described circular target plate is chromium plating and being formed in substrate, and described substrate is zinc sulfide crystal; The diameter of described circular target plate is 30mm, and thickness is 5mm.
Lens barrel in described Cassegrain's colimated light system adopts hard steel to make, and the primary mirror in described Cassegrain's colimated light system and secondary mirror all adopt devitrified glass to make.
The system focal length of described Sai Gelin colimated light system is 1000mm, and primary and secondary mirror spacing is 132.603mm, and secondary mirror and image planes spacing are 319.380mm, and primary mirror conic coefficient is-0.687, and secondary mirror conic coefficient is-0.1715.
Multispectral integrated target plate, controlled current flow LED light source and the Cassegrain's colimated light system through aberration optimization, tolerance analysis and thermal design organically combine by the utility model, achieve field detect in multi-spectrum light axis collimation to detect and resolution detects the online generation of pattern.Compared to existing multispectral detection system, multispectral integrated target plate is combined with controlled current flow LED light source by the utility model, overcomes that the special middle needs of a target are frequently changed, the problem of adjustment target plate and light source repeatedly, decreases error factor; Adopt the Cassegrain's colimated light system through aberration optimization and thermal design, optimize image quality, reduce the volume mass of system, and make system have larger tolerance and higher thermal adaptability; The method of finite element analysis is used to determine the best position of LED light source and temperature sensor, under the prerequisite not affecting four bar target pattern imagings, achieve the Uniform Illumination to it, and Real-Time Monitoring and fine adjustment can be carried out to four bar target patterns (temperature of four bar target patterns can regard the temperature of four bar target pattern center as) and target plate (target plate temperature can regard the temperature of the four bar target pattern edges as) temperature difference.
Accompanying drawing explanation
Fig. 1 is the structural representation of the multispectral integrated target of the high precision of LED illumination in the utility model.
Fig. 2 is the structural representation of multispectral integrated target plate in the utility model.
Fig. 3 is the structural representation of the minimum resolvable temperature difference utilizing multispectral integrated target detection thermal infrared imager in the utility model.
Fig. 4 is the installation site structural representation of LED light source and two temperature sensors in the utility model.
Fig. 5 is the structural representation utilizing multispectral integrated target detection range finder using laser and thermal infrared imager plain shaft parallelism in the utility model.
Embodiment
Embodiment 1: a kind of multispectral integrated target of high precision of LED illumination.
As shown in Figure 1, the multispectral integrated target of the high precision of LED illumination provided by the utility model comprises multispectral integrated target plate 2, controlled current flow LED light source 1 and Cassegrain's colimated light system 3.Cassegrain's colimated light system 3 comprises lens barrel 4, primary mirror 5 and secondary mirror 6; Primary mirror 5 and secondary mirror 6 are catoptron.Multispectral integrated target plate 2 is arranged on focal plane (or claiming image planes) place of Cassegrain's colimated light system 3; Controlled current flow LED light source 1 is a kind of LED light source by controlling size of current regulation heating and luminous intensity, and controlled current flow LED light source 1 is for providing infrared and white low-light to throw light on for multispectral integrated target plate 2.
Cassegrain's colimated light system 3 is the Cassegrain's colimated light systems through aberration optimization, tolerance analysis and thermal design.Cassegrain's colimated light system 3 applies the structure of Cassegrain, has the advantage that compact conformation, lens barrel are shorter, can meet the demand that quality is little, volume is little, conveniently carry.
Aberration optimization is on the basis of standard Cassegrain structure, use optical design software, utilize the default majorized function of software, and adding five operands such as EFFL, MNCA, MNXA, COVA and MTFA, in these five operands, EFFL is used for control system focal length, MNCA is for controlling primary and secondary mirror spacing, MNXA is for controlling secondary mirror and image planes spacing, and COVA is for controlling primary and secondary mirror conic coefficient, and MTFA is for control MTF curve; By the conic coefficient of primary and secondary mirror distance, secondary mirror and image planes distance, primary mirror and secondary mirror and four items and six item asphericity coefficients are set to variable, be optimized.Through aberration optimization, Cassegrain's colimated light system focal length is 1000mm, length is less than 460mm, quality is less than 3.5Kg, primary and secondary mirror spacing is-132.603mm(primary and secondary mirror spacing is negative value, and this is a kind of representation in optical design, represents that light is to back reflective), secondary mirror and image planes spacing are 319.380mm, and the conic coefficient of primary and secondary mirror is respectively-0.687 and-0.1715.Now under colimated light system zero visual field, disc of confusion is close to Airy disk, and axle outer visual field disc of confusion also significantly reduces, and system MTF close to 0.3, optimizes the performance of Cassegrain's colimated light system in 0.707 visual field greatly.
Tolerance analysis is the analysis affected image quality primary and secondary mirror spacing in Cassegrain's colimated light system and primary mirror and focal plane spacing.Use macroprogram, in adjustment Cassegrain colimated light system, the spacing of primary and secondary mirror spacing and primary mirror and focal plane, calculates the disc of confusion size under corresponding tolerance.Through tolerance analysis, for the spacing variable quantity within the scope of ± 0.05mm, central vision disc of confusion radius can not be greater than 9 μm.Therefore in the utility model, Cassegrain's colimated light system has larger tolerance, can greatly reduce assembly cost and difficulty.
In the utility model, thermal design have employed optical passive mode and to disappear hot difference method.By setting up heating differential analysis model, to determine to disappear the relation of lens barrel material and catoptron (comprising primary mirror and secondary mirror) material thermal expansion coefficient in heat difference situation, final selection hard steel is as lens barrel material, and devitrified glass is as reflecting mirror material, and eliminating Cassegrain well, to collimate traditional heat poor.Use finite element method simulation analysis, and the system model under high temperature and low temperature condition is input to optical design software, carry out thermal design and ensure that colimated light system all can have good image quality between-40 DEG C to 50 DEG C.Cassegrain's colimated light system after above-mentioned design has good thermal adaptability, and use the optical passive mode hot difference method that disappears to reduce system bulk, quality, decrease the use of mechano-electronic device, make that its structure is simple, cost is low, and make system have good stability.
As shown in Figure 2, multispectral integrated target plate comprises circular target plate, and in the present embodiment, circular target plate adopts zinc sulfide crystal to be base material, formed by basad material chromium plating; The diameter of circular target plate is 30mm, and thickness is 5mm.Circular target plate has made cross division line by photoetching process, the center being centrally located at circular target plate of cross division line, circular target plate is divided into four quadrants by cross division line.In cross division line, the length of lines is 22mm, and width d is 0.5mm.Different resolution (or claiming resolving power) check pattern has been made by photoetching process in each quadrant of circular target plate, be respectively: in the first quartile of circular target plate, be carved with first resolution check pattern, second resolution check pattern is carved with in its second quadrant, in its third quadrant, be carved with the 3rd resolution check pattern, in its fourth quadrant, be carved with the 4th resolution check pattern.Regard cross division line as coordinate axis, the resolution check pattern in four quadrants is all equal apart from the minimum distance of coordinate axis, is 4mm.
First resolution check pattern is the first module of GB resolving power test target A type pattern, specifically: first resolution check pattern is made up of four groups of lines, has four equally spaced lines in each group; In four groups of lines, first group of lines is vertical moulding, and this group is positioned at the upper left corner; Second group of lines is vertical moulding, and this group is positioned at the lower right corner; 3rd group of lines and first group of lines are 45 ° of angles, and the 3rd group of lines are equivalent to first group of lines turns clockwise 45 ° and form, and this group is positioned at the lower left corner; 4th group of lines and first group of lines are 45 ° of angles, and vertical with the 3rd group of lines, and this group is positioned at the upper right corner.Line thickness in first resolution check pattern is 0.16mm, and line length is 1.2mm, and the spacing of adjacent two lines is 0.16mm.Second resolution check pattern is Unit the 13 of GB resolving power test target A type pattern, and namely the shape of second resolution check pattern and first resolution check pattern is just the same, and just both resolution is different.Line thickness in second resolution check pattern is 0.08mm, and line length is 1.2mm, and the spacing of adjacent two lines is 0.08mm.First resolution check pattern and second resolution check pattern are all for detecting the angular resolution of visible ray.
3rd resolution check pattern is the four bar target patterns that the vertical moulding equidistant by four, the ratio of width to height is 1:7 is formed, and it is for detecting the temperature difference resolution (MRTD, i.e. minimum resolvable temperature difference) of thermal infrared imager.Line thickness a in 3rd resolution check pattern is 0.25mm, and height h is 1.75mm, and the spacing of adjacent two lines is 0.25mm.
4th resolution check pattern is made up of two groups, left and right lines, has three equally spaced lines in each group; Being vertical moulding in left group, is ledgement in right group.4th resolution check pattern is for detecting the angular resolution of low-light level night vision device.In 4th resolution check pattern, the width of lines is 1mm, and length is 5mm, and the spacing of adjacent two lines is 1mm.
In the utility model, the substrate of circular target plate adopts zinc sulfide crystal, this is because zinc sulfide crystal has higher permeability in full spectral range, solve in multi-spectrum light axis collimation detects, needing to change the problem of target plate for generating dissimilar cross division line, decreasing the introducing of error component; Be distributed in the resolution check pattern of circular target plate four quadrants, meet the demand that visible ray, low-light and infrared resolution detect.Therefore, the multispectral integrated target plate in the utility model achieves the integrated of visible ray, low-light and infrared cross division line and resolving power check pattern, makes operating process simple and reduces because operating the error brought.
Embodiment 2: a kind of optical detecting method utilizing the multispectral integrated target of the high precision of LED illumination.
In the utility model, the multispectral integrated target of the high precision of LED illumination can be used for device under test and carries out resolution detection, also can be used for carrying out collimation detection to multi-spectrum light axis.Below to utilizing the optical detecting method of the multispectral integrated target of the high precision of LED illumination to be described in detail.
Adopt the multispectral integrated target device under test of high precision of the LED illumination in Fig. 1 to carry out resolution detection and can comprise following several situation: minimum resolvable temperature difference (MRTD) is carried out to thermal infrared imager and detects; Angular resolution detection is carried out to visible ray equipment; Angular resolution detection is carried out to low-light level night vision device; The light fixture being integrated with infrared and white low-light is carried out to the detection etc. of angular resolution and minimum resolvable temperature difference.Below this several situation is made introductions all round.
1., carry out minimum resolvable temperature difference (MRTD) to thermal infrared imager to detect.
As shown in Figure 3, open controlled current flow LED light source 1(and can be called for short LED light source), make the multispectral integrated target plate 2 of infrared light that controlled current flow LED light source 1 sends because of heat radiation, and thermal infrared imager 7 is incident to after Cassegrain's colimated light system 3, human eye observes image formed by four bar target patterns on multispectral integrated target plate in third quadrant by thermal infrared imager 7.
In the process of eye-observation four bar target pattern image, the electric current of adjustment controlled current flow LED light source 1 raises from low to high gradually, when human eye clearly can observe four bar target pattern images, stop adjusting the electric current of controlled current flow LED light source 1, now record the temperature at four bar target pattern center on multispectral integrated target plate in third quadrant and edge, namely the difference of two temperature is the minimum resolvable temperature difference of thermal infrared imager 7.
The temperature at four bar target pattern center and edge in third quadrant on two multispectral integrated target plates of temperature sensors difference Real-Time Monitoring is adopted in the utility model.The temperature of four bar target pattern center can regard the temperature of four bar target patterns, i.e. target temperature as, and the temperature of four bar target pattern edges can regard target plate temperature as, i.e. ambient temperature.
Controlled current flow LED light source 1 provides white low-light to throw light on and the object and background temperature difference of equivalent blackbody for multispectral integrated target plate 2.In order to generate the uniform four bar target pattern images of the temperature difference and realize the Real-Time Monitoring to the temperature difference, need the installation site determining LED light source and two temperature sensors.The infrared radiation of LED light source is utilized to throw light on to four bar target patterns, two temperature sensors are utilized to monitor the temperature at four bar target pattern center and edge respectively, by regulating the accurate control of LED working current realization to the temperature difference, do not affect the quality of four bar target pattern images simultaneously.In order to realize above object, LED light source external temperature field is analyzed.Consider that LED light source dimension is much smaller than lens barrel radius and the distance with target plate thereof, in analysis using controlled current flow LED light source as heat point source process.LED light source temperature field is approximately spherical distribution in a less region, any point temperature T and its square inversely proportional relation to the distance l of LED light source.As shown in Figure 4, in the plane that these three points of LED light source, target plate cross-graduation center and four bar target pattern center are established, take LED light source as initial point (0,0) coordinate system is set up, the installation site (i.e. center position) of multispectral integrated target plate is (55,0), on multispectral integrated target plate, the center of four bar target patterns is (55,4.09).The first temperature sensor for detecting target plate temperature is arranged on position A(23.32,50) place, the first temperature sensor is equal apart from the distance of LED light source with four bar target pattern edges apart from the distance of LED light source; The second temperature sensor for detecting four bar target pattern temperature is arranged on position B(37.97,40) place, the second temperature sensor is equal apart from the distance of LED light source with four bar target pattern center apart from the distance of LED light source.
2., angular resolution detection is carried out to visible ray equipment.
When needs carry out angular resolution detection to visible ray equipment, only the thermal infrared imager in Fig. 3 need be replaced with visible ray equipment.Concrete detecting step is: open controlled current flow LED light source, make controlled current flow LED light source the multispectral integrated target plate of visible light-transmissive sent out, and after Cassegrain's colimated light system, be incident to visible ray equipment to be measured; Regulate LED light source to rated current, human eye observes the resolution check pattern of first quartile and the second quadrant on multispectral integrated target plate by visible ray equipment to be measured.If can differentiate the pattern of the second quadrant clearly, then visible ray equipment angular resolution to be measured is better than 0.16mrad; If the pattern of first quartile can be differentiated clearly, but can not the pattern of clear resolution second quadrant, then visible ray device resolution to be measured is better than 0.32mrad, but does not reach 0.16mrad; If can not differentiate the pattern of first quartile clearly, then illustrate that the angular resolution of visible ray equipment to be measured is lower than 0.32mrad, angular resolution is poor.
3., angular resolution detection is carried out to low-light level night vision device.
When needs carry out angular resolution detection to low-light level night vision device, only the thermal infrared imager in Fig. 3 need be replaced with low-light level night vision device.Concrete detecting step is: make low-light level night vision device to be measured just to multispectral integrated target, the resolution check pattern of fourth quadrant on the multispectral integrated target plate of eye-observation, regulate being increased gradually by zero by electric current, until the resolution check pattern of fourth quadrant can be observed of LED light source simultaneously.By judging that in fourth quadrant, can pattern be clearly observed, can judge that low-light level night vision device resolution is better than 2mrad still lower than 2mrad.
4., the light fixture being integrated with infrared and white low-light is carried out to the detection of angular resolution and temperature difference resolution.
If be integrated with infrared, visible ray and low-light in existing light fixture, this light fixture is carried out to the detection of resolution, this Devices to test only need be made to replace thermal infrared imager in Fig. 3, then can realize detecting the minimum resolvable temperature difference of infrared light and realize to detect the angular resolution of visible ray and low-light according to above-mentioned steps.
If also have other Devices to test to need detection angle resolution or minimum resolvable temperature difference, only can need realize according to described step above.
Utilize the multispectral integrated target of the high precision of LED illumination to carry out collimation detection to multi-spectrum light axis in the utility model to comprise the following steps:
As shown in Figure 5, be described for the plain shaft parallelism of detection laser range finder 8 and thermal infrared imager 7 in the present embodiment, specific as follows:
A, open controlled current flow LED light source 1 and adjust its electric current, make controlled current flow LED light source 1 the visible ray sent out and the multispectral integrated target plate 2 of infrared light sent due to heat radiation, and go out to be shot out after Cassegrain's colimated light system 3.
B, consider that the bore of Cassegrain's colimated light system 3 is less, adopt rhombic prism 11 that the optical axis by Cassegrain's colimated light system 3 outgoing is carried out translation, make the light beam directs thermal imaging system 7 after translation, the direct incident laser range finder 8 of light beam of non-translation.After the telescope ocular of range finder using laser 8, place CCD9, CCD9 center is aimed at the telescopic central of range finder using laser 8, and CCD9 is connected with the computing machine 10 of band image pick-up card.
C, observed the image of multispectral integrated target plate by thermal infrared imager 7; Adjustment thermal infrared imager 7 makes its optical axis center overlap with the picture centre of multispectral integrated target plate; Using the optical axis of thermal infrared imager 7 as benchmark optical axis;
Deviation angle between the optical axis of d, detection laser range finder 8 and benchmark optical axis, can realize detecting the collimation of range finder using laser 8 and thermal infrared imager 7 optical axis.
Deviation angle between the optical axis of detection laser range finder 8 and benchmark optical axis is specifically: observe multispectral integrated target plate by range finder using laser 8, and gather by the viewed image of range finder using laser 8 with CCD9, find out the cross division line of the cross division line of range finder using laser 8 own and multispectral integrated target plate in the picture respectively; Center point coordinate (x is found out in the cross division line of multispectral integrated target plate
0, y
0), in the cross division line of range finder using laser 8 own, find out center point coordinate (x, y) and every mil respective pixel value k; Again according to formula
the deviation angle between the optical axis of range finder using laser 8 and benchmark optical axis can be tried to achieve.
The concrete steps finding cross division line centre coordinate in image are: utilize Hough transform principle, in the cross-graduation line image collected, find two the longest straight-line segments, and calculate the deflection angle α of wherein certain craspedodrome section relative level direction or vertical direction; By image rotation angle α, two craspedodrome sections are made to be in horizontal direction and vertical direction respectively; Utilize energy accumulation method afterwards, ask the gray accumulation extreme value in two craspedodrome sections in image respectively, the transverse and longitudinal coordinate of gained extreme point is the centre coordinate of cross division line.
If also need, the optical axis of other Devices to tests is carried out to the detection of collimation, only need increase rhombic prism again, make by the incident Devices to test of the light of Cassegrain's colimated light system outgoing, then detect the deviation angle between Devices to test optical axis and benchmark optical axis, thus can realize detecting the collimation of multi-spectrum light axis.
Claims (5)
1. the multispectral integrated target of the high precision of LED illumination, is characterized in that, comprises multispectral integrated target plate, controlled current flow LED light source and Cassegrain's colimated light system; Described multispectral integrated target plate is arranged on the focal plane place of described Cassegrain's colimated light system, and described controlled current flow LED light source is used for providing infrared and white low-light to throw light on for described multispectral integrated target plate;
Described Cassegrain's colimated light system comprises lens barrel and the primary mirror that is arranged in described lens barrel and secondary mirror;
Described multispectral integrated target plate comprises circular target plate, and described circular target plate is carved with cross division line, the center being centrally located at described circular target plate of described cross division line, and described circular target plate is divided into four quadrants by described cross division line; Different resolution check pattern is carved with respectively in four quadrants of circular target plate;
Resolution check pattern in first quartile is made up of four groups of lines, has four equally spaced lines in each group; In four groups of lines, first group of lines is vertical moulding, and this group is positioned at the upper left corner; Second group of lines is ledgement, and this group is positioned at the lower right corner; 3rd group of lines and first group of lines are 45 ° of angles, and this group is positioned at the lower left corner; 4th group of lines and first group of lines are 45 ° of angles, and vertical with the 3rd group of lines, and this group is positioned at the upper right corner;
Resolution check pattern in second quadrant is identical with the resolution check pattern in first quartile, but both resolution is different;
Resolution check pattern in third quadrant is the four bar target patterns that the vertical moulding equidistant by four, the ratio of width to height is 1:7 is formed;
Resolution check pattern in fourth quadrant is made up of two groups, left and right lines, has three equally spaced lines in each group; Being vertical moulding in left group, is ledgement in right group.
2. the multispectral integrated target of the high precision of LED illumination according to claim 1, is characterized in that, the line length of described cross division line is 22mm, and width is 0.5mm; Line thickness in resolution check pattern in first quartile is 0.16mm; Line thickness in resolution check pattern in second quadrant is 0.08mm; Line thickness in resolution check pattern in third quadrant is 0.25mm; Line thickness in resolution check pattern in fourth quadrant is 1mm.
3. the multispectral integrated target of the high precision of LED illumination according to claim 1, is characterized in that, described circular target plate is chromium plating and being formed in substrate, and described substrate is zinc sulfide crystal; The diameter of described circular target plate is 30mm, and thickness is 5mm.
4. the multispectral integrated target of the high precision of LED illumination according to claim 1, is characterized in that, the lens barrel in described Cassegrain's colimated light system adopts hard steel to make, and the primary mirror in described Cassegrain's colimated light system and secondary mirror all adopt devitrified glass to make.
5. the multispectral integrated target of the high precision of LED illumination according to claim 1, it is characterized in that, the system focal length of described Sai Gelin colimated light system is 1000mm, primary and secondary mirror spacing is 132.603mm, secondary mirror and image planes spacing are 319.380mm, primary mirror conic coefficient is-0.687, and secondary mirror conic coefficient is-0.1715.
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| CN201520936521.8U CN205157167U (en) | 2015-11-23 | 2015-11-23 | Multispectral integrated target of high accuracy of LED illumination |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334027A (en) * | 2015-11-23 | 2016-02-17 | 中国人民解放军总装备部军械技术研究所 | High-precision multispectral integrated target for LED illumination and matched optical detecting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334027A (en) * | 2015-11-23 | 2016-02-17 | 中国人民解放军总装备部军械技术研究所 | High-precision multispectral integrated target for LED illumination and matched optical detecting method |
| CN105334027B (en) * | 2015-11-23 | 2018-04-06 | 中国人民解放军总装备部军械技术研究所 | The multispectral integrated target of high accuracy of LED illumination and supporting optical detecting method |
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