CN102819014B - Optical system for testing laser distance measurer performance based on off-axis parabolic mirror - Google Patents
Optical system for testing laser distance measurer performance based on off-axis parabolic mirror Download PDFInfo
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- CN102819014B CN102819014B CN2012102563806A CN201210256380A CN102819014B CN 102819014 B CN102819014 B CN 102819014B CN 2012102563806 A CN2012102563806 A CN 2012102563806A CN 201210256380 A CN201210256380 A CN 201210256380A CN 102819014 B CN102819014 B CN 102819014B
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Abstract
The invention provides an optical system for testing a laser distance measurer performance based on an off-axis parabolic mirror. An emission optical path and a receiving optical path of a laser distance measurer, and a laser echo light path simulated by a laser radiator can be contained at the same time; the system comprises a light source component, a laser emission performance measurement unit, a laser receiving performance measurement unit and a laser distance measurement/irradiating component performance measurement unit; the light source component is composed of the off-axis parabolic mirror, a white light source and a dividing plate, a beam splitter 1, a beam splitter 2, a target plate, a pore aperture replicate mirror and a long-focus CCD (Charge Coupled Device) vidicon; the laser emitting performance measurement unit comprises a full-reflector, an objective lens group, a spectroscope, an energy detector, a nanosecond detector and a light splitter detector, and the laser receiving performance measurement unit comprises a laser simulating light source and double optical wedges.
Description
Technical field
The present invention relates to the laser range finder performance test, relate in particular to the range finder using laser performance test optical system based on off axis paraboloidal mirror.
Background technology
At present the domestic light path system that adopts while for the range finder using laser combination property, testing uses the double light path mode of separation more; The light path that is testing laser range finder emitting performance and range finder using laser is separated, and measuring method is loaded down with trivial details and reproducibility and reliability is poor, and can't complete from the Laser emission of range finder using laser and test to the whole synthesis of laser pick-off.In addition, because whole light path system does not have unified optical reference, (laser beam center and optical reference overlap) operates with regard to more complicated in the alignment procedures of light path like this, and owing to being the optical system of separating light path, so there is the possibility of optical malfunction in whole system.
Summary of the invention
Be directed to the problems referred to above, the invention provides a kind of performance test of range finder using laser based on off axis paraboloidal mirror optical system, can take in simultaneously the return laser beam light path that range finder using laser emission light path, receiving light path and laser irradiator simulate.
Should, based on the range finder using laser performance test optical system of off axis paraboloidal mirror, comprise light source part, Laser emission performance measurement unit, laser pick-off performance measurement unit and laser ranging/illumination module performance measurement unit; Light source part is comprised of turn back mirror and long burnt ccd video camera of off-axis paraboloidal mirror, white light source and graticule, beam divider 1, beam divider 2, target plate, aperture; Laser emission performance measurement unit comprise total reflective mirror, objective lens, spectroscope, energy-probe, nanosecond detector and light divide the instrument detector; Laser pick-off performance measurement unit comprises laser analog light source and two wedge; In measuring Laser emission performance process, in total reflective mirror incision light path, laser is launched by the laser emission assembly, laser is reflected by total reflective mirror again after emitting antenna expands, then pass through objective lens, after spectroscope, a part of laser enters energy-probe and measures laser energy, and another part enters light and divides the instrument detector to carry out the measuring laser beam quality; When total reflective mirror removed light path, laser was imaged on graticule by attenuator and off axis paraboloidal mirror, then utilized long burnt ccd video camera and turn back sem observation laser beam axis deviation and optical axis stable, and white light source is cross curve on graticule be benchmark;
In measuring laser pick-off performance process, total reflective mirror removes light path, the laser analog light source is launched continuous analog laser by aperture, this laser becomes parallel beam through off axis paraboloidal mirror again by beam divider 2 and beam divider 1, enters receiving antenna by two wedges finally and arrives the laser pick-off assembly;
Described laser ranging/illumination module performance measurement unit comprise accurate echo chronotron and nanosecond detector; Detector received laser that the laser emission assembly sends and repaid chronotron by precision and trigger Laser Simulator and produce simulated laser nanosecond, to be received by the laser pick-off assembly through the simulated laser that postpones, realize the simulation test of laser range finder range capability.
Above-mentioned optical system is take the focus of off axis paraboloidal mirror as optical reference, and by two beam dividers 1,2, builds two conjugate focuses; One is used for placing the target plate that receives laser, and another is used for placing the laser analog light source.
Beneficial effect of the present invention:
Not only can test range finder parts static parameter (as emitted energy, pulse width, beam divergence angle and many plain shaft parallelisms etc.) by this light path system.In addition, can also detect the range finder overall performance, as parameters such as distance measurement function, distance accuracy and effective beam divergent angles.This technology can be the range finder using laser ability meter or other laser activity test macro provides light path, is convenient to high precision, high stable and tests highly reliably relevant laser equipment parameters.
Description of drawings
Fig. 1 is that optical system of the present invention forms schematic diagram;
1-off axis paraboloidal mirror wherein, the 2-mirror of turning back, the long burnt ccd video camera of 3-, the two wedges of 4-, 5-product Installation and Debugging platform, 6-laser pick-off assembly receiving antenna, 7-laser emission assembly emitting antenna, the 8-attenuator, the 9-total reflective mirror, 10-laser analog light source, 11-beam divider 2, 12 beam dividers 1, 13 apertures, the 14-target plate, 15-white light source and graticule, the 16-objective lens, the 17-spectroscope, 18-light detector-dividing, the accurate echo chronotron of 19-, 20-nanosecond detector, the 21-energy-probe, the 22-optical table,
Fig. 2 is that optical system of the present invention is implemented particular flow sheet.
Embodiment
Require and actual need of work according to range finder using laser ability meter optic test,, in conjunction with practical application, determined the optical system based on off axis paraboloidal mirror;
A) design and the processing of heavy caliber, high precision off axis paraboloid mirror, can adapt to many optical axises spacing and reach the precision adjustment of many optical axises system of 300mm.
B) use inner-adjustable focus collimator and CCD camera system coarse adjustment and accurate adjustment laser optical axis and emitting antenna light shaft coaxle degree respectively;
C) damping capacity of the optical attenuator that computerizeds control is changed, cancelled operation manually, improve the automatization level of calibration equipment; The plain shaft parallelism adjustment system software of designed exploitation has image acquisition and processing capacity, has again instrument and controls function, and is easy and simple to handle, friendly interface.
As shown in Figure 1, optics Installation and Debugging platform is used for test product correctly is arranged in the performance test light path that designs according to specific (special) requirements, carries out properties of product and detects, and the acquisition testing Data Concurrent is delivered to observing and controlling and display device.Mainly by light source part, product mounting platform, Laser emission performance measurement unit, laser pick-off performance measurement unit, laser ranging/illumination module performance measurement unit.Be used for each ingredient of laser ranging/illumination module is installed, as the laser irradiator assembly, laser pick-off assembly, laser transmitting antenna, laser receiving antenna and electronic package etc.Light source part is comprised of turn back mirror and long burnt ccd video camera of off-axis paraboloidal mirror, white light source and graticule, beam divider 1, beam divider 2, target plate, aperture; Laser emission performance measurement unit comprise total reflective mirror, objective lens, spectroscope, energy-probe, nanosecond detector and light divide the instrument detector; Laser pick-off performance measurement unit comprises laser analog light source and two wedge;
Workflow such as Fig. 2 of system show.Its key step is as follows:
The foundation of step 1, equipment Inspection benchmark
Utilizing correcting device, make the white light source cross curve strictly be positioned at the focal point F place of off axis paraboloidal mirror, the aperture of Laser Simulator is positioned at conjugate focus F " locate, target plate is positioned at conjugate focus F " ' locate, light path schematic diagram such as Fig. 1 show.
The borescope of adjusting product makes F " the white light graduation center of locating and borescope graticule center superposition.
Step 2, Laser emission Performance Detection
The Laser emission Performance Detection comprises laser irradiator and the debugging of emitting antenna right alignment and detection and Laser emission pulse Performance Detection.
Step 3, laser pick-off Performance Detection
The detection of field of view of receiver and adjustment, use laser analog light source, off axis paraboloidal mirror, two wedges etc. to carry out.
Step 4, laser ranging illumination module system performance testing
The system performance of laser ranging illumination module detects uses long burnt ccd video camera, off axis paraboloidal mirror, laser analog light source, white light source, beam divider, target plate, total reflective mirror, objective lens, nanosecond detector, accurate echo chronotron etc. to carry out.
Claims (2)
1., based on the range finder using laser performance test optical system of off axis paraboloidal mirror, comprise light source part, Laser emission performance measurement unit, laser pick-off performance measurement unit and laser ranging/illumination module performance measurement unit; It is characterized in that: light source part is comprised of off axis paraboloidal mirror, white light source and graticule, beam divider 1, beam divider 2, target plate, aperture, turn back mirror and long burnt ccd video camera; Laser emission performance measurement unit comprises that total reflective mirror, objective lens, spectroscope, energy-probe and light divide the instrument detector; Laser pick-off performance measurement unit comprises laser analog light source and two wedge;
In measuring Laser emission performance process, in total reflective mirror incision light path, laser is launched by the laser emission assembly, laser is reflected by total reflective mirror again after emitting antenna expands, then pass through objective lens, after spectroscope, a part of laser enters energy-probe and measures laser energy, and another part enters light and divides the instrument detector to carry out the measuring laser beam quality; When total reflective mirror removed light path, laser was imaged on graticule by attenuator and off axis paraboloidal mirror, then utilized long burnt ccd video camera and turn back sem observation laser beam axis deviation and optical axis stable, and white light source is cross curve on graticule be benchmark;
In measuring laser pick-off performance process, total reflective mirror removes light path, the laser analog light source is launched continuous analog laser by aperture, this continuous analog laser becomes parallel beam through off axis paraboloidal mirror again by beam divider 2 and beam divider 1, enters receiving antenna by two wedges finally and arrives the laser pick-off assembly;
Described laser ranging/illumination module performance measurement unit comprise accurate echo chronotron and nanosecond detector; Detector received the laser that the laser emission assembly sends and by accurate echo chronotron, triggered the laser analog light source and produce simulated laser nanosecond, to be received by the laser pick-off assembly through the simulated laser that postpones, realize the simulation test of range finder using laser range capability.
2. the performance test of the range finder using laser based on off axis paraboloidal mirror optical system as claimed in claim 1 is characterized in that: above-mentioned optical system is take the focus of off axis paraboloidal mirror as optical reference, and by beam divider 1, beam divider 2, builds two conjugate focuses; One is used for placing the target plate that receives laser, and another is used for placing the laser analog light source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102563806A CN102819014B (en) | 2012-07-23 | 2012-07-23 | Optical system for testing laser distance measurer performance based on off-axis parabolic mirror |
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| CN2012102563806A CN102819014B (en) | 2012-07-23 | 2012-07-23 | Optical system for testing laser distance measurer performance based on off-axis parabolic mirror |
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| CN102819014B true CN102819014B (en) | 2013-11-13 |
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| CN103791843B (en) * | 2013-11-05 | 2016-08-17 | 中国科学院西安光学精密机械研究所 | System and method capable of realizing accurate measurement of off-axis parameters of off-axis reflector |
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| CN108051182B (en) * | 2017-11-07 | 2020-02-21 | 扬州科莱光电技术有限公司 | Laser subsystem comprehensive test equipment |
| CN109813529A (en) * | 2017-11-21 | 2019-05-28 | 北京振兴计量测试研究所 | Optical parameter detection device for laser photoelectricity detection system |
| CN108444410B (en) * | 2018-06-20 | 2020-08-14 | 湖北三江航天红峰控制有限公司 | Device and method for measuring parallelism of convergent laser emission optical axis and tracking visual axis |
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| CN109407076B (en) * | 2018-12-24 | 2023-12-22 | 西安工业大学 | Optical axis detection system and detection method for high-energy pulse laser range finder |
| CN110824459B (en) * | 2019-12-19 | 2024-07-05 | 成都英飞睿技术有限公司 | Intelligent optical axis adjustment system based on interference fringes and adjustment method thereof |
| CN111442911A (en) * | 2020-04-23 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | System and method for measuring consistency of optical axes of high-power pulse laser range finder |
| WO2022161123A1 (en) | 2021-01-29 | 2022-08-04 | 上海睿钰生物科技有限公司 | Laser distance measuring method, focusing method, laser distance measuring system, focusing system, and auto-focusing analysis device |
| CN112946673B (en) * | 2021-01-29 | 2023-01-06 | 上海睿钰生物科技有限公司 | Laser ranging method, focusing method, laser ranging system and focusing system |
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| JP3950818B2 (en) * | 2003-05-29 | 2007-08-01 | アイシン精機株式会社 | Reflective terahertz spectrometer and measurement method |
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