CN201255687Y - Digital vision difference measurement device - Google Patents
Digital vision difference measurement device Download PDFInfo
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- CN201255687Y CN201255687Y CNU2008201363163U CN200820136316U CN201255687Y CN 201255687 Y CN201255687 Y CN 201255687Y CN U2008201363163 U CNU2008201363163 U CN U2008201363163U CN 200820136316 U CN200820136316 U CN 200820136316U CN 201255687 Y CN201255687 Y CN 201255687Y
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Abstract
The utility model belongs to the technical field of optical precision measurement, and relates to a digital parallax measuring device, which comprises a light source, an objective lens, an image acquisition module, a computer and a mechanical and electronic translation stage. The light source lights a reticule of a measured optical system through an ocular lens; light goes through a teleobjective, enters into the objective lens and is imaged on the image acquisition module; the image acquisition module sends the image to the computer; the computer controls the mechanical and electronic translation stage to realize mechanical and electronic translation; the mechanical and electronic translation stage returns mechanical and electronic translation data to the computer; and the objective lens is mounted on the mechanical and electronic translation stage. The digital parallax measuring device also comprises a beam splitting system; the light enters into a coarse sighting video camera through the beam splitting system; the acquired video signal is transmitted to a monitor, for the coursing sighting alignment before measurement. The digital parallax measuring device uses the computer to correct measurement errors produced by environment changes, has the advantages of high precision, high speed and good objectivity, and can be used for the detection of the optical system and the high-precision parallax measurement in assembly.
Description
Technical field
The utility model belongs to technical field of optical precision measurement, is a kind of digital parallax device, can be used for the detection of optical system graticule and the high precision parallax measurement in the assembling process.
Technical background
Optical system structure as shown in Figure 1, wherein graticule 3 very difficult assurances are contained on picture side's focal plane 4 of telephotolens 2 (or equivalent object lens) exactly, apart from focal plane one alignment parallax 6 is arranged, then the parallel rays 1 of infinite distance target just can not be focused on the graticule 3 through telephotolens 2 imagings, therefore human eye can not be seen target and graticule 3 simultaneously clearly, and influence is to the observation of target; Because the influence of line parallax 6 is observed by the eyepiece 5 of optical system, when human eye moved at eyepiece 5 vertical direction of principal axis, the picture of infinite distance object and the mutual changing of the relative positions of division line meeting in the visual field produced overall parallax angle 7 at object space, the influence aiming.
Particularly have the visual light imaging system of graticule at various optical instruments, often the focal plane of accurately not adjusting to telephotolens owing to graticule produces parallax, has seriously influenced observation and aiming to target.Telescopic system graticule when assembling is to lean on the human eye visual means to realize the parallax adjustment for a long time.After optical system is adjusted through visual parallax, overall parallax angle 4 '～6 ' about, the optical system of having only high precision and big multiplying power just Ke Tiao Zheng Dao ≦ 1 '.Along with the fast development of photoelectric instrument, various advanced persons' photoelectricity is seen and to be taken aim at system and be badly in need of high-precision parallax measurement and adjustment means.
About the retrieval of parallax measurement technology both at home and abroad has: " a kind of automatic testing method of parallax " of " infrared and laser engineering "; " the utilizing CCD to realize the automatic Research of measuring of telescopic system parallax " of " semiconductor optoelectronic " and " the optical instrument parallax detects research automatically " of " optical instrument ".Although these parallax measurement technology add CCD shooting and image capture module, but still continued to use traditional visual measuring method, continued to use split type light path, need provide the infinity target by parallel light tube, light path is adjusted complicated, introduce more systematic error, failed to realize real high precision parallax measurement.
Summary of the invention
The purpose of this utility model is in order to improve the parallax measurement precision, to improve the parallax measurement method and a kind of digital parallax device is provided, can be used for the detection of optical system and the high precision parallax measurement in the assembling process.
The purpose of this utility model is achieved through the following technical solutions.
A kind of digital parallax device comprises: comprise light source, tested optical system, object lens, image capture module, computing machine and dynamo-electric translation stage, wherein object lens are installed on dynamo-electric translation stage; Tested optical system comprises eyepiece, graticule and telephotolens; Move towards the statement annexation with light path: tested optical system is between light source and object lens, light source is by the throw light on graticule of tested optical system of eyepiece, light enters object lens and imaging on image capture module after seeing through telephotolens, image capture module becomes image to send computing machine to institute, computer controlled machine electricity translation stage is realized dynamo-electric translation, and dynamo-electric translation stage returns dynamo-electric translation data to computing machine.
Slightly taking aim on time before measuring can also comprise beam splitting system, slightly take aim at video camera, monitor, and its light path trend is, after light sees through telephotolens, carry out light path through beam splitting system and switch, enter and slightly take aim at video camera, with the video signal transmission that collects on the monitor; Slightly take aim at aim at finish after, beam splitting system is switching-over light path once more, the transmitted ray of telephotolens is passed to object lens, and imaging on image capture module, image capture module becomes image to send computing machine to institute, computer controlled machine electricity translation stage is realized dynamo-electric translation, and dynamo-electric translation stage returns dynamo-electric translation data to computing machine.
After finishing parallax measurement, can also comprise environment monitoring module and casing, wherein environment monitoring module places casing inside, sends the environmental parameter in the casing to computing machine, the measuring error that the computing machine correction is caused by environmental change.
The measuring method of digital parallax instrument is: at first the object lens of digital parallax instrument are aimed at telephotolens, use the graticule of the tested optical system of light illumination then, graticule is successively by imaging on image capture module behind telephotolens, beam splitting system, the object lens.The object lens of computer controlled machine electricity translation stage drive then move axially, thereby have changed defocusing amount, realize the out of focus scanning of the relative object focal point of image capture module.In the out of focus scanning process, computing machine obtains the digital picture of one group of corresponding graticule of different axial locations, and, calculate the line parallax and the overall parallax angle of tested optical system with the defocusing amount of this axial location by the highest axial location of computed in software image definition value.
Before measurement is carried out, can also use beam splitting system that the light that telephotolens transmits is turned back, and slightly taking aim at imaging on the video camera, slightly take aim at video camera with the video signal transmission that collects on the monitor, slightly take aim at aligning fast before the adjustment personnel can measure according to the image of monitor.
After measurement is finished, can also use a computer and obtain the environmental parameter of casing inside by environment monitoring module, then computing machine is according to the parallax measurement result of the tested optical system of environmental parameter correction.
After measurement is finished, can also use a computer and calculate the aberration of object lens, then computing machine is according to the parallax measurement result of the tested optical system of aberration value correction of object lens.
Beneficial effect
1) improve the measurement light path, need not to use parallel light tube that the infinity target is provided, light path is easy to adjust, and measuring speed is fast;
2) realize computer-controlled robotization parallax measurement, measuring speed is fast;
3) systematic error in the software correction measuring process, the measuring accuracy height;
4) have and slightly take aim at function, it is fast to regulate the speed before the survey.
Description of drawings
Fig. 1 is a conventional parallax measuring method schematic diagram;
Fig. 2 is the system architecture synoptic diagram of the utility model embodiment;
Fig. 3 is the index path of the utility model embodiment;
Fig. 4 is the actual test data figure of the utility model embodiment;
Fig. 5 is the statistic histogram of the actual test data of the utility model embodiment;
Wherein: 1-parallel rays, 2-telephotolens, 3-graticule, 4-picture side focal plane, 5-eyepiece, 6-line parallax, 7-overall parallax angle, 8-light source, the tested optical system of 9-, 10-beam splitting system, 11-object lens, 12-image capture module, 13-computing machine, 14-environment monitoring module, the dynamo-electric translation stage of 15-, 16-slightly take aim at video camera, 17-monitor, 18-casing, 19-object focal point, 20-defocusing amount.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 2, a kind of digital parallax device of the present utility model comprises light source 8, object lens 11, image capture module 12, computing machine 13, dynamo-electric translation stage 15; Described light source 8 is the direct-current LED light source, and by the graticule 3 of the tested optical system 9 of eyepiece 5 illuminations, after light was the telephotolens 2 of 164.99mm through focal length, seeing through focal length was the object lens 11 of 201.4mm, and imaging on image capture module 12.Image capture module 12 adopts digital ccd video camera, and becomes image to send computing machine 13 to institute, and computing machine 13 controllers electricity translation stage 15 is realized dynamo-electric translation, and dynamo-electric translation stage 15 returns dynamo-electric translation data by serial ports to computing machine 13; Described object lens 11 are installed on dynamo-electric translation stage 15.
Also comprise beam splitting system 10, slightly take aim at video camera 16, monitor 17, wherein slightly take aim at video camera 16 for having the ccd video camera of 16mm focal length lens, beam splitting system 10 is rotatable 45 ° catoptron, catoptron is turned back 90 ° with telephotolens 2 emergent raies, and by slightly taking aim at video camera 16 receptions, the video image of video camera shows on CRT monitor 17, slightly takes aim at adjustment fast before being used to measure.
Also comprise environment monitoring module 14, it adopts the PT100 temperature sensor, use serial ports to be connected with computing machine, the real time temperature parameter can be sent to computing machine 13, computing machine 13 multiply by temperature variation according to the temperature expansion coefficient of dynamo-electric translation stage 15 and obtains the temperature expansion amount, then in the parallax measurement result, deduct the correction swell increment, revise the measuring error that causes by temperature variation.
There is its intrinsic curvature of field aberration in object lens 11 among the embodiment in design and process, the software of computing machine 13 can calculate curvature of field value by the curvature of field secular equation of object lens 11, then in inspecting measurement result, deduct the curvature of field value of revising object lens 11, revise because the parallax measurement error that the curvature of field of object lens 11 causes.
Dynamo-electric translation stage 15 among the embodiment is connected with computing machine by serial ports, utilizes the grating chi with 0.5 μ m resolution to make up closed loop, and the movable distance of dynamo-electric translation stage 15 is 35mm, can realize the dynamo-electric translation of high precision closed loop.
At first, the object lens 11 of digital parallax instrument are aimed at telephotolens 2, with the graticule 3 of the tested optical system 9 of light source 8 illuminations, the light of graticule 3 is successively by telephotolens 2, beam splitting system 10, object lens 11 back imagings on image capture module 12 then.
Then, computing machine 13 controllers electricity translation stage 15 drives object lens 11 and moves axially, thereby has changed defocusing amount 20, realizes the out of focus scanning of image capture module 12 relative object focal points 19.In the out of focus scanning process, computing machine 13 obtains the digital picture of one group of corresponding graticule 3 of different axial locations, and, calculate the line parallax 6 and the overall parallax angle 7 of tested optical system with the defocusing amount 20 of this axial location by the highest axial location of image processing software environment for use calculating definition values.
Then, computing machine 13 passes through the curvature of field secular equation of object lens 11 and the temperature data calculating parallax result's that environment monitoring module 14 transmits modified value, finishes the correction to the parallax measurement result.At last, revised parallax measurement result is shown on computers.
Tested optical system 9 adopts the telephotolens 2 of 164.99mm focal length among the embodiment, the digital parallax instrument adopts the object lens 11 of 201.4mm focal length, duplicate measurements parallax 100 times, software test data as shown in Figure 4, the mean value of tested telescopic system line parallax 6 is 53.8 μ m.Data are carried out drawing after the error analysis, and the expanded uncertainty of line parallax 6 is 1.82 μ m, and the expanded uncertainty that is scaled overall parallax angle 7 is 0.32 ", the Histogram statistics data plot is as shown in Figure 5.
Pass through actual detected: this embodiment has improved the precision of parallax measurement by a series of measure, has realized the digitizing parallax measurement, and the digital parallax instrument is compared with the routine measurement method, and measuring accuracy has improved one more than the order of magnitude.
Below in conjunction with the accompanying drawings embodiment of the present utility model is described; but these explanations can not be understood that to have limited scope of the present utility model; protection domain of the present utility model is limited by the claims of enclosing, and any change on the utility model claim basis all is protection scope of the present invention.
Claims (3)
1 digital parallax device is characterized in that: comprise light source (8), tested optical system (9), object lens (11), image capture module (12), computing machine (13) and dynamo-electric translation stage (15), wherein object lens (11) are installed on dynamo-electric translation stage (15); Tested optical system (9) comprises eyepiece (5), graticule (3) and telephotolens (2); Move towards the statement annexation with light path: tested optical system (9) is between light source (8) and object lens (11), light source (8) is by the throw light on graticule (3) of tested optical system (9) of eyepiece (5), light enters object lens (11) and goes up imaging at image capture module (12) after seeing through telephotolens (2), image capture module (12) becomes image to send computing machine (13) to institute, computing machine (13) controller electricity translation stage (15) is realized dynamo-electric translation, and dynamo-electric translation stage (15) returns dynamo-electric translation data to computing machine (13).
2. digital parallax device according to claim 1, it is characterized in that: slightly taking aim at before measuring on time, beam splitting system (10) be can also comprise, slightly video camera (16), monitor (17) taken aim at, its light path trend is, after light sees through telephotolens (2), carry out light path through beam splitting system (10) and switch, enter and slightly take aim at video camera (16), the video signal transmission that collects is given on the monitor (17); Slightly take aim at aim at finish after, beam splitting system (10) is switching-over light path once more, the transmitted ray of telephotolens (2) is passed to object lens (11), and in upward imaging of image capture module (12), image capture module (12) becomes image to send computing machine (13) to institute, computing machine (13) controller electricity translation stage (15) is realized dynamo-electric translation, and dynamo-electric translation stage (15) returns dynamo-electric translation data to computing machine (13).
3. digital parallax device according to claim 1, it is characterized in that: after finishing parallax measurement, can also comprise environment monitoring module (14) and casing (18), wherein environment monitoring module (14) places casing (18) inside, send the environmental parameter in the casing (18) to computing machine (13), computing machine (13) is revised the measuring error that is caused by environmental change.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201363163U CN201255687Y (en) | 2008-09-19 | 2008-09-19 | Digital vision difference measurement device |
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| CNU2008201363163U CN201255687Y (en) | 2008-09-19 | 2008-09-19 | Digital vision difference measurement device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611911A (en) * | 2010-12-23 | 2012-07-25 | 特克特朗尼克公司 | Disparity cursors for measurements of 3d images |
| CN103323216A (en) * | 2013-06-05 | 2013-09-25 | 长安大学 | Device and method for detecting parallax error of collimator |
| CN105872522A (en) * | 2011-04-08 | 2016-08-17 | 特克特朗尼克公司 | Semi-automatic 3D stereoscopic disparity cursor |
| CN102611911B (en) * | 2010-12-23 | 2016-12-14 | 特克特朗尼克公司 | The parallax cursor measured for 3D rendering |
-
2008
- 2008-09-19 CN CNU2008201363163U patent/CN201255687Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611911A (en) * | 2010-12-23 | 2012-07-25 | 特克特朗尼克公司 | Disparity cursors for measurements of 3d images |
| CN102611911B (en) * | 2010-12-23 | 2016-12-14 | 特克特朗尼克公司 | The parallax cursor measured for 3D rendering |
| CN105872522A (en) * | 2011-04-08 | 2016-08-17 | 特克特朗尼克公司 | Semi-automatic 3D stereoscopic disparity cursor |
| CN103323216A (en) * | 2013-06-05 | 2013-09-25 | 长安大学 | Device and method for detecting parallax error of collimator |
| CN103323216B (en) * | 2013-06-05 | 2015-10-14 | 长安大学 | A kind of device and method detecting parallax error of collimator |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20091019 |