CN103398984B - The outfield measuring method of photo-electric telescope transmissivity of optical system - Google Patents
The outfield measuring method of photo-electric telescope transmissivity of optical system Download PDFInfo
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- CN103398984B CN103398984B CN201310310736.4A CN201310310736A CN103398984B CN 103398984 B CN103398984 B CN 103398984B CN 201310310736 A CN201310310736 A CN 201310310736A CN 103398984 B CN103398984 B CN 103398984B
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Abstract
The outer field measurement device of photo-electric telescope transmissivity of optical system and measuring method, belong to photoelectric instrument field, solving existing single beam detection method cannot to the problem that the transmitance of photo-electric telescope optical system is effectively measured under condition of external field, and this device comprises bracing frame; Be arranged on the manual adjustment platform on bracing frame; Be fixed on the He-Ne laser instrument manually adjusted on platform; Primarily of the laser powermeter that probe and output display device form, probe placement is in the output window front end of He-Ne laser instrument, and vertical with the Laser output optical axis of He-Ne laser instrument.He-Ne laser device laser bundle is covered by laser powermeter probe by the present invention completely, and get mean square value again by the transmitance value of the optical system under probe measurement diverse location and different output wavelength thus record transmitance, realize under condition of external field effective measurement of photo-electric telescope transmissivity of optical system, method is simple and direct, convenient, and cost is lower.
Description
Technical field
The present invention relates to technical field of photoelectric instruments, be specifically related to a kind of outer field measurement device and measuring method of photo-electric telescope transmissivity of optical system.
Background technology
Photo-electric telescope is mainly used in the measurement of airflight target location and corresponding echoing characteristics, general photo-electric telescope is all in the field work that environment is more severe, and the whole optical system of heavy caliber photo-electric telescope is difficult to accomplish sealing state, dust is stained with at corresponding lens surface, institute's film plating layer suffers erosion and even comes off, the transmitance of photo-electric telescope is reduced, (tracking is comprised to the due characteristic of photo-electric telescope, receiving range etc.) anticipation accurately cannot be accomplished, needed before executing the task very necessary to the test of transmissivity of optical system for this reason, but it is very single to the detection means of the transmitance of whole photo-electric telescope optical system at present, by means of only the detection method of single beam, be made up of pointolite parallel light tube and receiver, pointolite parallel light tube provides the luminous flux of the axial pencil entering optical system, receiving device adopts the solarization photoelectric cell comparatively close with human eye spectral pattern as Sensitive Apparatus, record photocurrent corresponding to incident flux (empty survey) respectively by galvanometer and calculate through the photocurrent (actual measurement) that the luminous flux of optical system is corresponding, easily be subject to the impact of bias light and the interference of other noise, therefore test condition is required comparatively harsh, must detect optical system in darkroom (under dark environment), actual measurement simultaneously and empty survey are tested in same optical system, need to move tested photo-electric telescope for twice, this testing conditions is not possessed under external field environment, effectively cannot measure the transmitance of optical system, therefore design a kind of under external field environment to photo-electric telescope in optical system transmitance detect method become current problem demanding prompt solution.
Summary of the invention
Under condition of external field, the problem of effectively measurement cannot be carried out to solve existing single beam detection method to the transmitance of photo-electric telescope optical system, the invention provides a kind of outer field measurement device and the measuring method that can measure photo-electric telescope transmissivity of optical system under condition of external field fast, easily.
The technical scheme that the present invention adopts for technical solution problem is as follows:
The outer field measurement device of photo-electric telescope transmissivity of optical system, this device comprises:
Bracing frame;
Be arranged on the manual adjustment platform on support frame as described above;
Be fixed on the He-Ne laser instrument on described manual adjustment platform;
Primarily of the laser powermeter that probe and output display device form, described probe placement is in the output window front end of He-Ne laser instrument, and vertical with the Laser output optical axis of He-Ne laser instrument.
Support frame as described above is made up of supporting leg and mounting platform, described manual adjustment stage+module is on the upper surface of described mounting platform, described three or four supporting legs are fixed on the lower surface of described mounting platform, spacing between adjacent two supporting legs is equal, and the angle that all supporting legs tilt laterally is equal.
The measuring method of the outer field measurement device of photo-electric telescope transmissivity of optical system, condition and the step of the method are as follows:
Step one, adjustment bracing frame make the laser beam of He-Ne laser instrument enter in the optical system visual field of photo-electric telescope, and fine setting manually adjustment platform makes the laser beam of He-Ne laser instrument parallel with the optical axis of optical system;
Step 2, by the output window front end of probe placement at He-Ne laser instrument, and keep vertical with the Laser output optical axis of He-Ne laser instrument, popping one's head in covers completely by the laser beam of He-Ne laser instrument, records the numerical value of now output display device;
Step 3, by the image planes position of probe placement at photo-electric telescope, and keep vertical with the optical axis of optical system, popping one's head in covers completely by the laser beam of the optical frames group outgoing through optical system, records the numerical value of now output display device;
Step 4, by the numerical value in step 2 divided by the numerical value in step 3, the ratio obtained is the transmitance value of optical system;
Step 5, change the output wavelength of He-Ne laser instrument, repeat step 2, step 3 and step 4, obtain the transmitance value of optical system under different output wavelength, the multiple transmitance values obtained are got root mean square try to achieve optical system finally through rate.
The optical system of described photo-electric telescope comprises: primary mirror, secondary mirror, dichronic mirror and optical frames group; The laser beam outgoing after described primary mirror, secondary mirror, dichronic mirror and optical frames group successively of described He-Ne laser instrument.
The invention has the beneficial effects as follows: measurement mechanism of the present invention and measuring method measure the performance number of the output power value of He-Ne laser instrument and the laser beam through optical system transmission by laser power, achieve the effective measurement to photo-electric telescope transmissivity of optical system under condition of external field, in measuring process, by the probe of laser powermeter, the laser beam of He-Ne laser instrument is covered completely, and get mean square value again by the transmitance value of the optical system under probe measurement diverse location and different output wavelength, solve the measurability to photo-electric telescope system transmitance under condition of external field, simultaneously simple and direct in realization, convenient, and it is with low cost.
Accompanying drawing explanation
Fig. 1 is the view before the outer field measurement device test of photo-electric telescope transmissivity of optical system of the present invention;
Fig. 2 is the process schematic of the measurement mechanism beam transmission when measuring in Fig. 1.
In figure: 1, adjustable support frame, 11, supporting leg, 12, mounting platform, 2, manually platform is adjusted, 3, He-Ne laser instrument, 31, output window, 4, laser powermeter, 41, probe, 42, output display device, 5, optoelectronic device, 6, photo-electric telescope, 61, secondary mirror, 62, primary mirror, 63, dichronic mirror, 64, optical frames group.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, the outer field measurement device of photo-electric telescope transmissivity of optical system of the present invention, primarily of adjustable bracing frame 1, manual adjustment platform 2, the He-Ne laser instrument 3 that output wavelength is adjustable and laser powermeter 4 form, bracing frame 1 is made up of supporting leg 11 and mounting platform 12, manual adjustment platform 2 is arranged on the upper surface of mounting platform 12, supporting leg 11 is fixed on the lower surface of mounting platform 12, the quantity of supporting leg 11 is three or four, spacing between adjacent two supporting legs 11 is equal, the angle that all supporting legs 11 tilt to the outside of mounting platform 12 is equal, to ensure the stability of bracing frame 1, simultaneously, supporting leg 11 can also move the angle of expansion inclination laterally to adjust whole height and the stability of bracing frame 1, He-Ne laser instrument 3 is fixed on and manually adjusts on platform 2, laser powermeter 4 forms primarily of probe 41 and output display device 42, as shown in Figure 1, before the start of the measurement, probe 41 is placed on output window 31 front end of He-Ne laser instrument 3, and keep vertical with the Laser output optical axis of He-Ne laser instrument 3.
The measuring method of the outer field measurement device of photo-electric telescope transmissivity of optical system of the present invention, its condition and step as follows:
Step one, adjustment bracing frame 1 make the laser beam of He-Ne laser instrument 3 enter in the optical system visual field of photo-electric telescope 6, and fine setting manually adjustment platform 2 makes the laser beam of He-Ne laser instrument 3 parallel with the optical axis of the optical system of photo-electric telescope 6;
Step 2, as shown in Figure 1, first the probe 41 of laser powermeter 4 is placed on output window 31 front end of He-Ne laser instrument 3, and keep vertical with the Laser output optical axis of He-Ne laser instrument 3, the laser beam of He-Ne laser instrument 3 41 covers by probe completely, reads the numerical value of now output display device 42 and record;
Step 3, again the probe 41 of laser powermeter 4 is placed on photo-electric telescope 6 image planes position near, and keep vertical with the optical axis of the optical system of photo-electric telescope 6, the laser beam of optical frames group 64 outgoing through optical system 41 covers by probe completely, reads the numerical value of now output display device 42 and record;
Step 4, by the numerical value in step 2 divided by the numerical value in step 3, the ratio obtained is the transmitance value of the optical system of photo-electric telescope 6;
Step 5, change the output wavelength of He-Ne laser instrument 3, repeat step 2, step 3 and step 4, obtain the transmitance value of optical system under different output wavelength, the multiple transmitance values obtained are got root mean square, try to achieve optical system finally through rate.
The optical system of photo-electric telescope 6 comprises: primary mirror 62, secondary mirror 61, dichronic mirror 63 and optical frames group 64; The laser beam outgoing after primary mirror 62, secondary mirror 61, dichronic mirror 63 and optical frames group 64 successively of He-Ne laser instrument 3, then be incident on the probe 41 of laser powermeter 4, the effect of optical frames group 64 is mainly used for temperature focusing and distance focusing, and corrects the aberration of optical system.
Claims (2)
1. the outfield measuring method of photo-electric telescope transmissivity of optical system, is characterized in that, condition and the step of the method are as follows:
Step one, adjustment bracing frame (1) make the laser beam of He-Ne laser instrument (3) enter in the optical system visual field of photo-electric telescope (6), and fine setting manually adjusts platform (2) makes the laser beam of He-Ne laser instrument (3) parallel with the optical axis of optical system;
Step 2, will pop one's head in (41) are placed on output window (31) front end of He-Ne laser instrument (3), and keep vertical with the Laser output optical axis of He-Ne laser instrument (3), the laser beam of He-Ne laser instrument (3) covers by probe (41) completely, records the numerical value of now output display device (42);
Step 3, will pop one's head in (41) are placed on the image planes position of photo-electric telescope (6), and keep vertical with the optical axis of optical system, the laser beam of optical frames group (64) outgoing through optical system covers by probe (41) completely, records the numerical value of now output display device (42);
Step 4, by the numerical value in step 2 divided by the numerical value in step 3, the ratio obtained is the transmitance value of optical system;
The output wavelength of step 5, change He-Ne laser instrument (3), repeat step 2, step 3 and step 4, obtain the transmitance value of optical system under different output wavelength, the multiple transmitance values obtained are got root mean square try to achieve optical system finally through rate.
2. the outfield measuring method of photo-electric telescope transmissivity of optical system according to claim 1, it is characterized in that, the optical system of described photo-electric telescope (6) comprising: primary mirror (62), secondary mirror (61), dichronic mirror (63) and optical frames group (64); The laser beam outgoing after described primary mirror (62), secondary mirror (61), dichronic mirror (63) and optical frames group (64) successively of described He-Ne laser instrument (3).
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| CN104601983B (en) * | 2014-12-25 | 2016-10-19 | 中国科学院长春光学精密机械与物理研究所 | The off-axis absolute spectral transmittance of how anti-space camera and homogeneity test device thereof |
| CN106644412A (en) * | 2016-12-30 | 2017-05-10 | 上海镭昊光电股份有限公司 | Multispectral reflection type collimator |
| CN108562547B (en) * | 2018-03-13 | 2021-02-19 | 中国科学院福建物质结构研究所 | Laser crystal thermal stress birefringence coefficient measuring device and method thereof |
| CN112763187B (en) * | 2020-11-30 | 2022-10-14 | 青岛歌尔声学科技有限公司 | Film material transmission optical performance testing system and method based on telescopic light path |
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| CN1916747A (en) * | 2006-09-08 | 2007-02-21 | 中国科学院光电技术研究所 | Damage detection device for non-linear optical device |
| CN101858779A (en) * | 2009-04-10 | 2010-10-13 | 南京理工大学 | Far-field laser power distribution measurer |
| CN102854169A (en) * | 2012-08-30 | 2013-01-02 | 中国科学院长春光学精密机械与物理研究所 | Tester for transmissivity of optical window of laser initiator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916747A (en) * | 2006-09-08 | 2007-02-21 | 中国科学院光电技术研究所 | Damage detection device for non-linear optical device |
| CN101858779A (en) * | 2009-04-10 | 2010-10-13 | 南京理工大学 | Far-field laser power distribution measurer |
| CN102854169A (en) * | 2012-08-30 | 2013-01-02 | 中国科学院长春光学精密机械与物理研究所 | Tester for transmissivity of optical window of laser initiator |
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