CN108931783A - A kind of device and method of high-acruracy survey laser ranging system performance - Google Patents
A kind of device and method of high-acruracy survey laser ranging system performance Download PDFInfo
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- CN108931783A CN108931783A CN201810945412.0A CN201810945412A CN108931783A CN 108931783 A CN108931783 A CN 108931783A CN 201810945412 A CN201810945412 A CN 201810945412A CN 108931783 A CN108931783 A CN 108931783A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a kind of device and methods of high-acruracy survey laser ranging system performance, this method is the light splitting function using color separation film, graticle with groove is equidistant fixed to color separation film two sides with laser fiber end-face, the laser that delayed echo generator assembly generates is emitted by parallel light tube to tested equipment by optical fiber.The device can be used for the detection of laser beam divergence in laser ranging system, light spot energy and laser ranging system range capability, it may also be used for demarcate the optical axis deviation of tested equipment laser transmitting-receiving.The invention is suitable for the real-time calibration of various laser ranging system performances, is also applied for the main electro-optical system passively combined and receives and dispatches with fields such as shaft detections, system focal plane module is fixed, calibrating method is simple, cheap for this.
Description
Technical field
The invention belongs to technical field of optical detection more particularly to a kind of dresses of high-acruracy survey laser ranging system performance
It sets and method, the invention device structure is simple, portable strong.Test software is simple, convenient, quick, especially suitable for
The testing requirement for the laser ranging system being made of sighting device and laser emitting module, laser pick-off module, various laser masters
The electro-optical system passively combined is received and dispatched with fields such as shaft detections.
Background technique
Laser ranging system has become the important component of all arms of ground force observation and aiming device now；Such as armoured unit
Main battle tank, mechanized infantry combat vehicle various gun commander surely as gun sight, vehicle commander's panoramic sight, survey and take aim at guidance instrument etc., laser
Range-measurement system allows to realize quick, accurate, the convenient and fast sophisticated equipment of one kind of search observation, object ranging, azimuthal measurement；
Due to being the technologies such as light harvesting, electricity, sensor in integrated, structure is complicated, failure rate is higher.Especially current high intensity actual combatization is instructed
In white silk, laser ranging system once breaks down, it will influences the purpose of operation of commander.Due to cannot unitized solution step
The Measuring error problem of island portion team laser ranging system is kept in soldier, artilleryman, armored force and coast defence, causes detection to maintain device model numerous
It is more, have a single function, funds resource is more, ensure low efficiency the problem of be difficult to solve for a long time.To solve these problems, pass through integrated side
All indexs of method unified measurement will be increasingly required.For laser ranging system detection technique and means status, there is an urgent need to
Research can swash in the general all arms of ground force that meets of field and indoor universal, individual soldier and vehicle-mounted general, army's grade and Base Level
A kind of generalization performance detection technology and means of ligh-ranging system；It can be built for army material support power and certain branch is provided
Support.For laser optical apparatus, optical axis registration is one of key technical index of instrument, and the variation of optical axis will directly affect
Detection to system is horizontal, and with the raising of the expansion of various optical instrument application ranges and application demand, to optical instrument
Stability, the requirement of optical axis registration accuracy it is also higher and higher, also the ground calibration of optical instrument and performance test are proposed
Higher requirement.The detectivity index of laser remote sensing system mainly include system range accuracy, investigative range (maximum ranging distance,
Minimum ranging), resolution of ranging and detection probability (false alarm rate, false dismissed rate).And the variation of optical axis registration will directly influence
The detectivity of system this requires that can have the instrument of standard or equipment that can test it, and calibrates variation feelings in time
Condition.
Summary of the invention
The object of the present invention is to provide a kind of device and methods of high-acruracy survey laser ranging system performance.Invention benefit
With the light splitting function of color separation film, by with groove graticle and laser fiber end-face is equidistant is fixed to color separation film two sides,
The laser that delayed echo generator assembly generates is emitted by parallel light tube to tested equipment by optical fiber, while in directional light
Pipe focal plane places the beacon light source of optical fiber output as instruction light.The system can be used for the diverging of the laser in laser ranging system
The detection at angle, light spot energy and laser ranging system range capability, it may also be used for demarcate the optical axis of tested equipment laser transmitting-receiving
Deviation.The invention is suitable for the real-time calibration of various laser ranging system performances, is also applied for the main electro-optical system passively combined
Transmitting-receiving is with fields such as shaft detections, and system focal plane module is fixed, calibrating method is simple, cheap for this.
The detection device of the method for the present invention is as shown in Fig. 1: the invention device should be controllable by parallel light tube 2, laser energy
Attenuating device 3 processed, delay echo gecerator component 4, attenuating device 5, lighting device 6, the graticle 7 with groove, detection phase
Machine 8,9 corner reflector 10 of color separation film composition.Wherein be delayed echo gecerator component 4 in the output optical fiber end face and with groove
Graticle 7 is respectively placed in the equidistant of 9 two sides of color separation film, is then put into together near the focal plane of parallel light tube 2.First will
The laser emitting module 1-2 of measured laser range-measurement system 1 issues laser, and laser is converged at by parallel light tube 2 with groove
On graticle 7, the crosshair that lighting device 6 illuminates the graticle 7 with groove is opened, is observing graduation using detection camera 8
Laser light spot intensity on plate is realized being continuously adjusted laser energy attenuation in proper strength for energy using attenuating device 5, led to
Cross laser facula size on the graticle 7 with groove, ratio, that is, measured laser of laser facula size and 2 focal length of parallel light tube
1 laser beam divergence of range-measurement system；Using the acquisition of delay echo gecerator component 4 with scattering laser arteries and veins on the graticle 7 of groove
Signal is rushed, emitting through delay 4 the output optical fiber end face of echo gecerator component for delay echo is generated by pulse signal, by flat
The collimation output of row light pipe 2, judges to receive by the way that whether the laser pick-off module 1-3 of measured laser range-measurement system 1 detects signal
Whether hair coaxially keeps good, while can control attenuating device 3 by laser energy to realize the continuously adjustable of energy
And then output signal size is controlled, to simulate measured laser range-measurement system 1 to the range capability of different distance.
The self-test when corner reflector 10 is placed in measured laser range-measurement system position for measuring device.
For the parallel light tube 2 using the reflective parallel light pipe of common process, aperture of mirror of looking in the distance is 350mm, telescope
Focal length is 2m, and paraboloid surface type requires RMS to be better than 1/20 λ@632.8nm.
The delayed echo generator assembly 4 is by high speed detector 4-1, delayed echo generator 4-2 and controllable light
Fine output laser 4-3 composition；Wherein high speed detector 4-1 is wide using respective wavelength range；Delayed echo generator 4-2 can be with
Beam shaping and delay pulse time are carried out, the outgoing of optical fiber output laser 4-3 and measured laser range-measurement system 1 can control to swash
The wavelength of light, pulse match.
The lighting source spectral region of the lighting device 6 needs the detection wavelength of part covering detection camera 8.
The rotating accuracy of the prism of corner cube 10 is less than 3 ".
Steps are as follows for laser ranging system performance measurement method specific method:
1 places a standard parallel light source, wavelength and the measured laser wavelength phase of source of parallel light first before parallel light tube 2
Together, then the graticle 7 with groove is fixed near the focal plane of parallel light tube 2, has groove using the detection observation of camera 8
Graticle 7 on imaging facula size, the position of graticle 7 of the adjustment with groove makes hot spot minimum, fixed to have groove
Graticle 7.
2 are added color separation film 9 before the graticle 7 with groove, and incident light is classified into two beams, and transmission channels are having groove
It is imaged on differentiation plate 7, reflection channel will generate another focus, in the near focal point constant time lag echo gecerator component 4
Middle light lead optical fiber, the output optical fibre using delay echo gecerator component 4 emit laser, optical maser wavelength and measured laser wavelength phase
Together, before corner reflector 10 being placed in parallel light tube 2, then before the light-coming out optical fiber end face of adjustment delay echo gecerator component 4
Position afterwards is adjusted to no matter corner reflector 10 is placed on any position of transmissive parallel light pipe, with the light at groove graticle
Until spot is motionless, the output optical fibre of constant time lag echo gecerator component 4.
3 keep it minimum in the parallel light tube imaging facula of the standard in the hot spot that delay echo gecerator component 4 issues, together
When be overlapped with the laser facula that delay echo gecerator component 4 issues with the crosshair with groove differentiation plate 7, it is finally fixed to prolong
When echo gecerator component 4 fiber end face.
Before the detection system being completed is placed into system under test (SUT) 1 by 4, orientation, the pitch angle of sighting device 1-1 are adjusted
To be directed at the crosshair with groove differentiation plate 7, the graticle 7 with groove illuminated using lighting device 6, the tested system of unlatching
System 1 in range laser, with detection camera 8 measure hot spot with groove 7 crosshair of graticle relative position, hot spot and
The position difference of crosshair represents the emission system in the sighting device 1-1 and laser ranging module 1-2 of system under test (SUT)
Optical axis deviation；
After 5 illuminated with laser light are with the graticle 7 of groove, partial dispersion pulsed light is detected by high speed detector 4-1, with this
Signal is initial pulse, and control laser issues identical pulse light after generating delayed echo, observes the reception response of system under test (SUT)
To judge to receive and dispatch whether optical axis is registrated.
6 by laser energy can control attenuating device 3 to simulate the laser energy of different location and observe system under test (SUT)
Responding ability.
By testing above, can obtain sighting device 1-1 in measured laser range-measurement system 1, laser emitting module 1-2,
Optical axis matching between laser pick-off module 1-3；It can detecte the laser beam quality of laser emitting module 1-2 simultaneously and swash
The ranging range etc. of optical receiver module 1-3.
The characteristics of invention, is mainly reflected in:
1) self checking method of the invention is simple, can satisfy indoor, vehicle-mounted use.
2) the focal plane module making method of the invention is easy to operate, easy to learn, and cooperation computer software is easy to operate.
Detailed description of the invention
Fig. 1 is the schematic diagram of the invention.
Fig. 2 is the workflow schematic diagram of the invention
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to the method for the present invention.
Main devices employed in the present invention are described as follows:
1) parallel light tube 2: using the off-axis reflection parallel light tube of common process, aperture of mirror of looking in the distance is 350mm, telescope
Focal length is 2m, and paraboloid surface type requires RMS to be better than 1/20 λ@632.8nm.
2) laser energy can control attenuating device 3: use Thorlabs company model for NDC-25C-4, extinction efficiency is from 0
~(- 40) db, bore Φ 25mm
3) delayed echo generator assembly 4: the equipment is home-built equipment, is mainly sent out by high speed detector 4-1, delayed echo
Raw device 4-2 and controllable optical fiber output laser 4-3 composition, after high speed detector 4-1 detects pulse signal, using postponing back
Wave producer 4-2 generates certain time delay analog echo signal, so that the laser for triggering optical fiber output laser 4-3 goes out
Light, to generate the laser signal thus the echo that is delayed；
4) attenuating device 5: using Thorlabs company model for NDC-50C-4, and extinction efficiency is from 0~-40dB, total light passing
Bore is Φ 50mm；
5) lighting device 6: using the broad spectrum light source of prosperous four standing grain photoelectricity company of Shenzhen, power 2W, for illuminating band
There is the crosshair of the graticle of groove.
6) graticle 7 of groove is had: using Chengdu credit spectroscopic optics Products Co., Ltd, customization differentiation plate.
7) it detects camera 8: using U.S.'s Spiricon company model for the laser beam analyzer of SP620, main performance ginseng
Number: service band 190nm-1100nm, pixel size 4.4um*4.4um, number of pixels 1600*1200；
8) color separation film 9: use Thorlabs company model for FGL1000 color separation film, Specifeca tion speeification: using 1064
Semi-transparent semi-reflecting, clear aperature 25mm, face type is better than the@of λ/10 632.8nm.
9) prism of corner cube 10: use Thorlabs company model for the prism of corner cube of PS971, Specifeca tion speeification: thoroughly
Smooth surface surface face type is better than the@of λ/10 632.8nm；Rotating accuracy is less than 3 ", clear aperture 25.4mm, transparency range 400-
1100。
In specific embodiment, the schematic diagram of apparatus of the present invention is as shown in Figure 1, specific step is as follows
1 places a standard parallel light source, wavelength and the measured laser wavelength phase of source of parallel light first before parallel light tube 2
Together, then the graticle 7 with groove is fixed near the focal plane of parallel light tube 2, has groove using the detection observation of camera 8
Graticle 7 on imaging facula size, the position of graticle 7 of the adjustment with groove makes hot spot minimum, fixed to have groove
Graticle 7.
2 are added color separation film 9 before the graticle 7 with groove, and incident light is classified into two beams, and transmission channels are having groove
It is imaged on differentiation plate 7, reflection channel will generate another focus, in the near focal point constant time lag echo gecerator component 4
Middle light lead optical fiber, the output optical fibre using delay echo gecerator component 4 emit laser, optical maser wavelength and measured laser wavelength phase
Together, before corner reflector 10 being placed in parallel light tube 2, then before the light-coming out optical fiber end face of adjustment delay echo gecerator component 4
Position afterwards is adjusted to no matter corner reflector 10 is placed on any position of transmissive parallel light pipe, with the light at groove graticle
Until spot is motionless, the output optical fibre of constant time lag echo gecerator component 4.
3 keep it minimum in the parallel light tube imaging facula of the standard in the hot spot that delay echo gecerator component 4 issues, together
When be overlapped with the laser facula that delay echo gecerator component 4 issues with the crosshair with groove differentiation plate 7, it is finally fixed to prolong
When echo gecerator component 4 fiber end face.
Before the detection system being completed is placed into system under test (SUT) 1 by 4, orientation, the pitch angle of sighting device 1-1 are adjusted
To be directed at the crosshair with groove differentiation plate 7, the graticle 7 with groove illuminated using lighting device 6, the tested system of unlatching
System 1 in range laser, with detection camera 8 measure hot spot with groove 7 crosshair of graticle relative position, hot spot and
The position difference of crosshair represents the emission system in the sighting device 1-1 and laser ranging module 1-2 of system under test (SUT)
Optical axis deviation；
After 5 illuminated with laser light are with the graticle 7 of groove, partial dispersion pulsed light is detected by high speed detector 4-1, with this
Signal is initial pulse, and control laser issues identical pulse light, the reception response of observation system under test (SUT) 1 after generating delayed echo
To judge to receive and dispatch whether optical axis is registrated.
6 by laser energy can control attenuating device 3 to simulate the laser energy of different location and observe system under test (SUT) 1
Responding ability.
By testing above, can obtain sighting device 1-1 in measured laser range-measurement system 1, laser emitting module 1-2,
Optical axis matching between laser pick-off module 1-3；It can detecte the laser beam quality of laser emitting module 1-2 simultaneously and swash
The ranging range etc. of optical receiver module 1-3.
Claims (6)
1. a kind of device of high-acruracy survey laser ranging system performance, including the controllable decaying of parallel light tube (2), laser energy
Device (3), attenuating device (5), lighting device (6), the graticle (7) with groove, is visited delay echo gecerator component (4)
Survey camera (8), color separation film (9) and corner reflector (10), it is characterised in that:
The output optical fiber end face being delayed in echo gecerator component (4) and graticle (7) with groove are respectively placed in point
The equidistant of color chips (9) two sides, is then put into together near the focal plane of parallel light tube (2)；First by measured laser ranging system
The laser emitting module (1-2) of system (1), which is opened, issues laser, and laser converges at the graduation with groove by parallel light tube (2)
On plate (7), the crosshair that lighting device (6) illuminate the graticle (7) with groove is opened, is realized using attenuating device (5)
Energy is continuously adjusted laser energy attenuation in proper strength, the laser facula on using detection camera (8) observation graticle
Intensity passes through laser facula size on the graticle (7) with groove, the ratio of laser facula size and parallel light tube (2) focal length
Value is measured laser range-measurement system (1) laser beam divergence；The graduation of groove is had using delay echo gecerator component (4) acquisition
Laser emitting module scattering laser pulse signal on plate (7) generates sending out through delay echo for delay echo by pulse signal
Raw device assembly (4) the output optical fiber end face transmitting, collimates by parallel light tube (2) and exports, and passes through swashing for measured laser range-measurement system
Whether optical receiver module (1-3) detects signal to judge whether transmitting-receiving coaxially keeps good, while can pass through laser energy
Attenuating device (3) be can control to realize the continuously adjustable of energy and then control output signal size, to simulate measured laser survey
Away from system (1) to the range capability of different distance；
The self-test when corner reflector (10) is placed in measured laser range-measurement system position for measuring device.
2. a kind of device of high-acruracy survey laser ranging system performance according to claim 1, it is characterised in that: described
Parallel light tube (2) use common process reflective parallel light pipe, aperture of mirror of looking in the distance be 350mm, telescope focal length be 2m, throw
Object plane face type requires RMS to be better than 1/20 λ@632.8nm.
3. a kind of device of high-acruracy survey laser ranging system performance according to claim 1, it is characterised in that: described
Delayed echo generator assembly (4) by high speed detector (4-1), delayed echo generator (4-2) and controllable optical fiber output
Laser (4-3) composition；Wherein high speed detector (4-1) is wide using respective wavelength range；Delayed echo generator (4-2) can be with
Beam shaping and delay pulse time are carried out, can control going out for optical fiber output laser (4-3) and measured laser range-measurement system (1)
Penetrate the wavelength of laser, pulse matches.
4. a kind of device of high-acruracy survey laser ranging system performance according to claim 1, it is characterised in that: described
Lighting device (6) lighting source spectral region need part covering detection camera (8) detection wavelength.
5. a kind of device of high-acruracy survey laser ranging system performance according to claim 1, it is characterised in that: described
Prism of corner cube (10) rotating accuracy less than 3 ".
6. a kind of based on a kind of laser ranging system of the device of high-acruracy survey laser ranging system performance described in claim 1
System performance measurement method, it is characterised in that method and step is as follows:
1) a standard parallel light source, wavelength and the measured laser wavelength phase of source of parallel light are placed before parallel light tube (2) first
Together, then the graticle (7) with groove is fixed near the focal plane of parallel light tube (2), utilizes detection camera (8) observation band
There is imaging facula size on the graticle (7) of groove, the position of graticle (7) of the adjustment with groove makes hot spot minimum, Gu
Surely the graticle (7) of groove is had；
2) color separation film (9) are added before the graticle (7) with groove, incident light is classified into two beams, and transmission channels are with quarter
It is imaged in line differentiation plate (7), reflection channel will generate another focus, in the near focal point constant time lag echo gecerator group
Light lead optical fiber in part (4) emits laser using the output optical fibre of delay echo gecerator component (4), and optical maser wavelength swashs with tested
Optical wavelength is identical, and before corner reflector (10) is placed in parallel light tube (2), then adjustment is delayed echo gecerator component (4)
Light-coming out optical fiber end face front-rear position is adjusted to no matter corner reflector (10) is placed on any position of transmissive parallel light pipe, is having
Until hot spot at groove graticle is motionless, the output optical fibre of constant time lag echo gecerator component (4)；
3) keep it minimum in the parallel light tube imaging facula of the standard in the hot spot that delay echo gecerator component (4) issues, together
When with delay echo gecerator component (4) issue laser facula with groove differentiation plate (7) crosshair be overlapped, finally admittedly
Surely the fiber end face of delay echo gecerator component (4)；
4) before the detection system being completed being placed into measured laser range-measurement system (1), the side of sighting device (1-1) is adjusted
Position, pitch angle come be aligned with groove differentiation plate (7) crosshair, using lighting device (6) illuminate with groove point
It draws plate (7), opens the range laser in system under test (SUT) (1), with graticle detection camera (8) measurement hot spot and have groove
(7) the position difference of the relative position of crosshair, hot spot and crosshair represents the aiming of measured laser range-measurement system (1)
The optical axis deviation of device (1-1) and the emission system in laser ranging module (1-2)；
5) after illuminated with laser light is with the graticle (7) of groove, partial dispersion pulsed light is detected by high speed detector (4-1), with
The signal is initial pulse, and control laser issues identical pulse light after generating delayed echo, observes measured laser range-measurement system
(1) reception responds to judge to receive and dispatch whether optical axis is registrated；
6) laser energy of different location is simulated by laser energy controllable attenuating device (3) to observe measured laser ranging
The responding ability of system (1).
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