CN108731650A - A kind of device and method for demarcating the laser transmitting system optical axis for having self-checking function - Google Patents
A kind of device and method for demarcating the laser transmitting system optical axis for having self-checking function Download PDFInfo
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- CN108731650A CN108731650A CN201810315036.7A CN201810315036A CN108731650A CN 108731650 A CN108731650 A CN 108731650A CN 201810315036 A CN201810315036 A CN 201810315036A CN 108731650 A CN108731650 A CN 108731650A
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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Abstract
The invention discloses a kind of device and methods for the laser transmitting system optical axis demarcated and have self-checking function.The invention is also applied for electro-optical system that various masters passively combine with fields such as shaft detections especially suitable for having the laser transmitting system of self-checking function.The invention is based on the light splitting function of spectroscope (Beam Splitter), laser beam analyzer and fiber end face is equidistant fixed to the both sides spectroscope (Beam Splitter), to be combined into the focal plane module of a fixed transceiver, the optical axis corresponding to fiber end face is transferred to some pixel of laser beam analyzer using the autocollimatic function of prism of corner cube；The primary optical axis of laser transmitting system is transferred to the optical axis corresponding to fiber end face by the pixel corresponding to laser beam analyzer, the relationship that laser is reversely emitted finally by optical fiber to test and between Calibration of Laser emission system optical axis and self-test light optical axis.The high-precision optical axis that the invention is suitable for having the laser transmitting system of self-checking function measures and calibration, calibrating method are simple, cheap.
Description
Technical field
The invention belongs to the laser transmitting systems that technical field of optical detection more particularly to a kind of calibration have self-checking function
The device and method of optical axis, apparatus structure is simple, easy to operate, the self-test error especially suitable for self-checking system in the case of various
Calibration.
Background technology
On airborne and spaceborne RS, laser is with its high spatial resolution, high sensitivity, monochromaticjty are good, the excellent spy such as round-the-clock
Property and receive favor, have a wide range of applications in geoscience and planetary science field.The laser remote sensing system of development
Include mainly laser altimeter, laser range finder, laser radar etc..Due to the shortening of detection wavelength used and adding for directionality
By force, the space of system, time resolution are obtained for prodigious raising, in military affairs, space flight, the earth mapping, engineering construction etc.
Aspect, which suffers from, to be widely applied and in-depth study.
For laser remote sensing system, the built in self testing system of laser beam axis is the optical axis for detecting laser remote sensing system
Variation is crucial, and the variation of laser beam axis is by the detectivity for the system that directly influences, this requires can have the instrument of standard or
Equipment can test self-checking system, and the case where can demarcate specific departure and variable quantity.And with various optical instruments
The expansion of application range and the raising of application demand, it is also higher and higher to the stability of optical instrument, the requirement of self-test precision, it is accurate
True self-test can ensure more accurately to carry out system balance.And in practical engineering application, parallel light tube is measured because of it
The features such as convenient and high certainty of measurement, so favored by optical detection person, and prism of corner cube is as a kind of foundation critical angle
The inner full-reflection prism of principle manufacture, it is not influenced by incidence angle size, by the arbitrary incident light into clear aperature
Line is efficiently pressed direction and is returned.The present invention is based on the light splitting functions of spectroscope (Beam Splitter), by laser beam analyzer and light
Fine end face is equidistant to be fixed to the both sides spectroscope (Beam Splitter), to be combined into the coke of a fixed transceiver
Optical axis corresponding to fiber end face is transferred to some picture of laser beam analyzer using the autocollimatic function of prism of corner cube by face mould block
Vegetarian refreshments；The primary optical axis of laser transmitting system is transferred to corresponding to fiber end face by the pixel corresponding to laser beam analyzer
Optical axis, the pass that laser is reversely emitted finally by optical fiber to test and between Calibration of Laser emission system optical axis and self-test light optical axis
System.The high-precision optical axis that invention is suitable for having the laser transmitting system of self-checking function measures and calibration, and calibrating method is simple, valence
Lattice are cheap.
Invention content
The object of the present invention is to provide a kind of device of laser transmitting system optical axis demarcated and have self-checking function and sides
Method.Light splitting function of the invention based on spectroscope (Beam Splitter), by laser beam analyzer and the equidistant fixation of fiber end face
To the both sides spectroscope (Beam Splitter) prism of corner cube is utilized to be combined into the focal plane module of a fixed transceiver
Autocollimatic function the optical axis corresponding to fiber end face is transferred to some pixel of laser beam analyzer；Recycling two is parallel
Light pipe runs through optical axis, demarcates by tested self-checking system self-test light and through the deviation of optical axis, adjusts self-checking system, this side
Method is suitable for the detection of self-checking system with high accuracy.
The detection device of the method for the present invention is as shown in Fig. 1：The device is tested flat by optical axis transfer parallel light tube 1, optical axis
Row light pipe 2, transmitting-receiving coaxial device 3, prism of corner cube 4, optical axis detection CCD 5,6 groups of laser transmitting system for having self-checking function
At, wherein：
Optical axis shifts parallel light tube 1 and transmitting-receiving coaxial device 3 and need to be used cooperatively, and transmitting-receiving coaxial device 3 is in optical axis transfer
Near 1 focal plane of parallel light tube, while the photosurface for receiving and dispatching laser beam analyzer 3-2 in coaxial device 3 is in optical axis transfer directional light
At 1 focal plane of pipe；Light splitting function of the coaxial device 3 by spectroscope 3-1 is received and dispatched, by the laser beam analyzer 3-2 for receiving signal
The fiber end face of photosurface and optical fiber laser 3-3 are equidistant to be fixed on its both sides, ultimately forms transmitting-receiving coaxial device 3；It utilizes
Optical axis corresponding to the fiber end face of optical fiber laser 3-3 is transferred to laser beam analyzer 3-2's by the autocollimatic function of prism of corner cube 4
Receive and dispatch coaxial pixel；Adjust the laser transmitting system 6 for having self-checking function so that main transmitting laser shifts parallel by optical axis
The hot spot that light pipe 1 converges at laser beam analyzer 3-2 is overlapped with coaxial pixel is received and dispatched；Then utilize optical fiber laser 3-3 reversed
Emit laser, which enters optical axis after optical axis transfer parallel light tube 1 collimates and tests parallel light tube 2, and
It converges on the optical axis detection CCD 5 at optical axis test 2 focal plane of parallel light tube, is provided simultaneously with the laser transmitting system of self-checking function
6 self-test light also enters optical axis after the 6-3 reflections of self-test prism and tests parallel light tube 2, and images in optical axis test parallel light tube 2
On optical axis detection CCD 5 at focal plane, the deviation between two imaging points is the deviation emitted between light and self-test light.
A kind of detection method of the device for the laser transmitting system optical axis having self-checking function based on the calibration, specifically
Method and step is as follows：
1) transmitting-receiving coaxial device 3 assembles
1-1) using designed structure by the photosurface and optical fiber laser of the laser beam analyzer 3-2 for receiving signal
The both sides spectroscope 3-1 are tentatively fixed in the single mode optical fiber end face of 3-3, the preliminary adjusting for completing transmitting-receiving coaxial device 3；
1-2) the transmitting-receiving coaxial device 3 tentatively completed is positioned near 1 focal plane of parallel light tube, open the light fibre laser 3-3,
The optical signal that optical fiber laser 3-3 is introduced by single mode optical fiber generates directional light after optical axis shifts parallel light tube 1, by pyramid
Prism 4 is placed on 1 front of parallel light tube, and being back on laser beam analyzer 3-2 from quasi-optical for prism of corner cube 4 passes through laser beam analyzer
3-2 observes the revolution facula position of prism of corner cube 4；
Prism of corner cube 4 1-3) is placed on to the different location in 1 front of optical axis transfer parallel light tube, observation prism of corner cube 4 returns
Turn whether facula position changes, if position changes, then adjusts the optical fiber end of single mode optical fiber in fiber ring laser system 3-3
Distance of the face to the centers spectroscope 3-1；
It is final so that prism of corner cube 4 is when optical axis shifts the different outlet ports of parallel light tube 1 1-4) by adjusting repeatedly
Echo facula position is constant, which is to receive and dispatch coaxial pixel, at this time the single-mode fiber end of optical fiber laser 3-3
The photosurface of face and laser beam analyzer 3-2 it is equidistant be distributed in the both sides spectroscope 3-1, complete the adjusting of transmitting-receiving coaxial device 3；
2) laser is matched with laser beam expanding system optical axis
2-1) adjust the direction of laser 6-1 in the laser transmitting system 6 for having self-checking function so that laser passes through optical axis
Transfer parallel light tube 1 converges on the coaxial pixel of transmitting-receiving of laser beam analyzer 3-2, the position of fixed laser 6-1；
2-2) self-test prism 6-3 is fixed tentatively on laser beam expanding system 6-2；
It 2-3) will be provided with laser beam expanding system 6-2 in the laser transmitting system 6 of self-checking function and be fixed on corresponding position, adjust
The direction of laser beam expanding system 6-2 so that the shoot laser of laser 6-1 is parallel by laser beam expanding system 6-2, optical axis transfer
It after light pipe 1, still converges on the coaxial pixel of transmitting-receiving of laser beam analyzer 3-2, completes laser and laser beam expanding system light
The matching of axis；
3) transfer of laser beam axis
The transmitting-receiving coaxial device 3 completed 3-1) will be adjusted and be positioned over the position of focal plane that optical axis shifts parallel light tube 1；
Before prism of corner cube 4 3-2) is placed on optical axis transfer parallel light tube 1 again so that single-mode optics in optical fiber laser 3-3
Fine emergent light is after optical axis transfer parallel light tube 1 collimates, using the transmitting-receiving of 4 autocollimatic of prism of corner cube to laser beam analyzer 3-2
On coaxial pixel；
The laser 6-1 for the laser transmitting system 6 for having self-checking function 3-3) is opened, main laser light beam passes through self-test prism
After 6-3 transmissions, laser beam expanding system 6-2 reflections, parallel light tube 1 is shifted into optical axis, has swashing for self-checking function by adjusting
The entirety of light emission system 6 so that the transmitting-receiving that the main laser light beam of laser 6-1 outgoing converges at laser beam analyzer 3-2 is coaxial
On pixel, the position of the fixed laser transmitting system 6 for having self-checking function；
3-4) optical signal that optical fiber laser 3-3 is introduced by single mode optical fiber generates after optical axis shifts parallel light tube 1
The main laser light beam that directional light, the direction of the directional light and the laser transmitting system 6 for having self-checking function are emitted is mutually 180 degree,
Complete the transfer of laser beam axis；
4) Laser emission and self-test light optical axis be registrated and detection
4-1) optical signal that optical fiber laser 3-3 is introduced by single mode optical fiber generates after optical axis shifts parallel light tube 1
Directional light, which images in after entering optical axis test parallel light tube 2 on the optical axis detection CCD 5 at focal plane, and recording should
Imaging point；
The laser 6-1 for the laser transmitting system 6 for having self-checking function 4-2) is opened, fraction of laser light passes through self-test prism 6-
3 reflections, the part self-test laser beam likewise enter optical axis test parallel light tube 2 and pass through when self-checking system is in the adjusting stage
Adjust self-test prism 6-3 so that self-test laser beam enters on the detection of the optical axis at focal plane CCD 5, and is fixed, and records
The position of the hot spot；
4-3) position deviation of two imaging faculas illustrates self-test laser in the laser transmitting system 6 for have self-checking function
The deviation of light beam and main laser light beam, corresponding angular deviation are：
Wherein：Parameter u is that two picture points detect 5 relative positions of CCD in optical axis, and unit um, f are the focal length of parallel light tube, single
Position m.
The advantage of the invention is that：
1) transmitting-receiving coaxial device self checking method of the invention is simple, high certainty of measurement, of low cost.
2) it is easy to operate to wear axis production method to systematic optical axis of the invention.
3) detecting system of the invention is all that can be applicable in the laser system of different wave length with reflective detection mode
Detection, wavelength selection depend primarily on the spectral wavelength ranges of laser beam analyzer.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the schematic diagram for receiving and dispatching coaxial device 3.
Specific implementation mode
The embodiment of the method for the present invention is described in detail below in conjunction with attached drawing.It is main employed in the present invention
Device is described as follows：
1) optical axis transfer parallel light tube 1, optical axis test parallel light tube 2：Using the reflective parallel light pipe of common process, hope
Remote aperture of mirror is 400mm, and telescope focal length is 4m, and system face type requires RMS to be better than 1/20 λ@632.8nm, and parallel light tube passes light
Plate Al films in face.
2) coaxial device 3 is received and dispatched:Coaxial device 3 is received and dispatched by spectroscope 3-1, laser beam analyzer 3-2 and optical fiber laser 3-3
Composition.Spectroscope 3-1 is using the unpolarized Amici prism of the model BS017 of Thorlabs companies band structure, main performance
Parameter：Service band is 700-1100nm, splitting ratio 50：50, clear aperture 20mm；Laser beam analyzer system 3-2 is used
U.S.'s Spiricon company models are the laser beam analyzer of SP620, Specifeca tion speeification：Service band 190nm-1100nm,
Pixel size 4.4um*4.4um, number of pixels 1600*1200；Fiber ring laser system 3-3 is exported with single mode optical fiber, and optical fiber is adopted
The single mode optical fiber for being SM600 with Thorlabs company models, Specifeca tion speeification：Service band is 600-900nm, optical fiber mode
Field diameter is 4.6um@680nm, covering 125 ± 1um of core diameter, is 550 ± 50nm by wavelength, optical fiber laser uses
Thorlabs company models are the laser diode of LPS-PM635-FC, Specifeca tion speeification：Optical maser wavelength is 635nm, light
Power adjustable range 1uw-10mw.
3) prism of corner cube 4：Use Thorlabs company models for the prism of corner cube of PS971, Specifeca tion speeification：Light transmission
Face 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-
1100nm。
4) optical axis detects CCD 5：Optical axis detection CCD 5 also uses U.S.'s Spiricon company models for the light beam of SP620
Analyzer, Specifeca tion speeification：Service band 190nm-1100nm, pixel size 4.4um*4.4um, number of pixels 1600*
1200；
5) has the laser transmitting system 6 of self-checking function：The laser transmitting system 6 for having self-checking function is examining system,
It is made of laser 6-1, laser beam expanding system 6-2 and self-test prism 6-3, wherein laser 6-1 is from the 1064nm pulses ground
Laser, pulse energy 180mj, energy stability are better than 10%；Laser beam expanding system 6-2 is 5 times of reflective beam-expanding systems,
Face type requires RMS to be better than 1/20 λ@632.8nm, and primary and secondary mirror plates Ag films；Self-test prism 6-3 is to take light plain film, and the depth of parallelism requires small
In 3 ".
In specific implementation mode, the dress school schematic diagram of apparatus of the present invention is as shown in Figure 1, be as follows
1) transmitting-receiving coaxial device 3 assembles
Using designed structure by the photosurface of the laser beam analyzer 3-2 for receiving signal and optical fiber laser 3-3
Single mode optical fiber end face be tentatively fixed on the both sides spectroscope 3-1, the preliminary adjusting for completing transmitting-receiving coaxial device 3；
The transmitting-receiving coaxial device 3 tentatively completed is positioned near 1 focal plane of parallel light tube, open the light fibre laser 3-3, optical fiber
The optical signal that laser 3-3 is introduced by single mode optical fiber generates directional light after optical axis shifts parallel light tube 1, by prism of corner cube
4 are placed in front of parallel light tube (1), and being back on laser beam analyzer 3-2 from quasi-optical for prism of corner cube 4 passes through laser beam analyzer 3-2
Observe the revolution facula position of prism of corner cube 4；
Prism of corner cube 4 is placed on to the different location in 1 front of optical axis transfer parallel light tube, observes the revolution light of prism of corner cube 4
Whether spot position changes, if position changes, then the fiber end face for adjusting single mode optical fiber in fiber ring laser system 3-3 arrives
The distance at the centers spectroscope 3-1；
It is final so that the echo when optical axis shifts the different outlet ports of parallel light tube 1 of prism of corner cube 4 by adjusting repeatedly
Facula position is constant, the constant position be receive and dispatch coaxial pixel, at this time the single mode optical fiber end face of optical fiber laser 3-3 with
The photosurface of laser beam analyzer 3-2 it is equidistant be distributed in the both sides spectroscope 3-1, complete the adjusting of transmitting-receiving coaxial device 3.
2) laser is matched with laser beam expanding system optical axis
Adjust the direction of laser 6-1 in the laser transmitting system 6 for having self-checking function so that laser is shifted by optical axis
Parallel light tube 1 converges on the coaxial pixel of transmitting-receiving of laser beam analyzer 3-2, the position of fixed laser 6-1；
Self-test prism 6-3 is fixed tentatively on laser beam expanding system 6-2；
It will be provided with laser beam expanding system 6-2 in the laser transmitting system 6 of self-checking function and be fixed on corresponding position, adjust laser
The direction of beam-expanding system 6-2 so that the shoot laser of laser 6-1 shifts parallel light tube by laser beam expanding system 6-2, optical axis
It after 1, still converges on the coaxial pixel of transmitting-receiving of laser beam analyzer 3-2, completes laser and laser beam expanding system optical axis
Matching.
3) transfer of laser beam axis
The transmitting-receiving coaxial device 3 completed will be adjusted and be positioned over the position of focal plane that optical axis shifts parallel light tube 1；
Before prism of corner cube 4 is placed on optical axis transfer parallel light tube 1 again so that single mode optical fiber goes out in optical fiber laser 3-3
Light is penetrated after optical axis transfer parallel light tube 1 collimates, the transmitting-receiving using prism of corner cube 4 autocollimatic to laser beam analyzer 3-2 is coaxial
On pixel；
The laser 6-1 for the laser transmitting system 6 for having self-checking function is opened, main laser light beam passes through self-test prism 6-3
After transmission, laser beam expanding system 6-2 reflections, parallel light tube 1 is shifted into optical axis, is sent out by adjusting the laser for having self-checking function
Penetrate the entirety of system 6 so that the main laser light beam of laser 6-1 outgoing converges at the coaxial pixel of transmitting-receiving of laser beam analyzer 3-2
On point, the position of the fixed laser transmitting system 6 for having self-checking function；
The optical signal that optical fiber laser 3-3 is introduced by single mode optical fiber generates parallel after optical axis shifts parallel light tube 1
The main laser light beam that light, the direction of the directional light and the laser transmitting system 6 for having self-checking function are emitted is mutually 180 degree, completes
The transfer of laser beam axis.
4) Laser emission and self-test light optical axis be registrated and detection
The optical signal that optical fiber laser 3-3 is introduced by single mode optical fiber generates parallel after optical axis shifts parallel light tube 1
Light, which images in after entering optical axis test parallel light tube 2 on the optical axis detection CCD5 at focal plane, and records the imaging
Point；
The laser 6-1 for the laser transmitting system 6 for having self-checking function is opened, fraction of laser light is anti-by self-test prism 6-3
It penetrates, which likewise enters optical axis test parallel light tube 2 and pass through tune when self-checking system is in the adjusting stage
Save self-test prism 6-3 so that self-test laser beam enters on the detection of the optical axis at focal plane CCD5, and is fixed, and recording should
The position of hot spot；
The position deviation of two imaging faculas illustrates self-test laser beam in the laser transmitting system 6 for have self-checking function
And the deviation of main laser light beam, corresponding angular deviation are：
Wherein：Parameter u is that two picture points detect 5 relative positions (unit um) of CCD in optical axis, and f is the focal length of parallel light tube
(unit m).
Claims (7)
1. a kind of device for demarcating the laser transmitting system optical axis for having self-checking function, by optical axis transfer parallel light tube (1), optical axis
Test parallel light tube (2), transmitting-receiving coaxial device (3), prism of corner cube (4), optical axis detection CCD (5), the laser for having self-checking function
Emission system (6) forms, it is characterised in that：
The optical axis transfer parallel light tube (1) need to be used cooperatively with transmitting-receiving coaxial device (3), and transmitting-receiving coaxial device (3) is in
Optical axis shifts near parallel light tube (1) focal plane, while the photosurface for receiving and dispatching laser beam analyzer (3-2) in coaxial device (3) is in
Optical axis shifts at parallel light tube (1) focal plane；Coaxial device (3) is received and dispatched by the light splitting function of spectroscope (3-1), will be used to receive
Laser beam analyzer (3-2) photosurface of signal with the fiber end face of optical fiber laser (3-3) is equidistant is fixed on its both sides, finally
Form transmitting-receiving coaxial device (3)；It is using the autocollimatic function of prism of corner cube (4) that the fiber end face institute of optical fiber laser (3-3) is right
The optical axis answered is transferred to the coaxial pixel of transmitting-receiving of laser beam analyzer (3-2)；Adjust the laser transmitting system for having self-checking function
(6) so that main transmitting laser converges at the hot spot of laser beam analyzer (3-2) by optical axis transfer parallel light tube (1) and receives and dispatches same
Axis pixel overlaps；Then reversely emit laser using optical fiber laser (3-3), which shifts by optical axis
Enter optical axis test parallel light tube (2) after parallel light tube (1) collimation, and converges at optical axis test parallel light tube (2) focal plane
Optical axis detects on CCD (5), and the self-test light for being provided simultaneously with the laser transmitting system (6) of self-checking function is reflected through self-test prism (6-3)
Also enter optical axis test parallel light tube (2) afterwards, and images in the optical axis detection CCD (5) at optical axis test parallel light tube (2) focal plane
On, the deviation between two imaging points is the deviation emitted between light and self-test light.
2. a kind of device for demarcating the laser transmitting system optical axis for having self-checking function according to claim 1, feature
It is：The optical axis transfer parallel light tube (1) and the parallel light tube that optical axis test parallel light tube (2) is routine, parallel light tube
Surface form deviation RMS value be less than the@632.8nm of λ/10, parallel light tube light pass surface matches with optical maser wavelength.
3. a kind of device for demarcating the laser transmitting system optical axis for having self-checking function according to claim 1, feature
It is：The transmitting-receiving coaxial device (3) is made of spectroscope (3-1), laser beam analyzer (3-2) and optical fiber laser (3-3)；
The fiber end face of the photosurface and single mode optical fiber in optical fiber laser (3-3) of the laser beam analyzer (3-2) is equidistant
The both sides of spectroscope (3-1) are fixed on, the spectroscope (3-1) is to using the splitting ratio of wavelength between 4：6 and 6：Between 4,
Light pass surface surface form deviation RMS value is less than the@of λ/10 632.8nm；Laser beam analyzer (3-2) photosurface swashs with the optical fiber
Light device (3-3) is at the focal plane of optical axis transfer parallel light tube (1)；The optical fiber laser (3-3) introduces optical signal warp
It crosses optical axis transfer parallel light tube (1) and generates directional light afterwards, autocollimatic is back to light beam point using the autocollimatic function of prism of corner cube (4)
In analyzer (3-2), the pixel corresponding to return light is to receive and dispatch coaxial pixel.
4. a kind of device of the calibration with self-test laser transmitting system self-test optical axis according to claim 1, it is characterised in that：
The rotating accuracy of the prism of corner cube (4) is less than 3 ".
5. a kind of device for demarcating the laser transmitting system optical axis for having self-checking function according to claim 1, feature
It is：The spectral response range of the laser beam analyzer (3-2) and optical axis detection CCD (5) are required to covering optical fiber laser
Wavelength.
6. a kind of device for demarcating the laser transmitting system optical axis for having self-checking function according to claim 1, feature
It is：The laser transmitting system (6) for having self-checking function is examining system, by laser (6-1), laser beam expanding system
(6-2) and self-test prism (6-3) form.
7. a kind of based on a kind of inspection of device that demarcating the laser transmitting system optical axis for having self-checking function described in claim 1
Survey method, it is characterised in that method and step is as follows：
1) transmitting-receiving coaxial device (3) assembles
1-1) using designed structure by the photosurface and optical fiber laser of the laser beam analyzer (3-2) for receiving signal
The both sides spectroscope (3-1) are tentatively fixed in the single mode optical fiber end face of (3-3), the preliminary adjusting for completing transmitting-receiving coaxial device (3)；
1-2) the transmitting-receiving coaxial device (3) tentatively completed is positioned near parallel light tube (1) focal plane, open the light fibre laser (3-
3) optical signal that, optical fiber laser (3-3) is introduced by single mode optical fiber generates parallel after optical axis transfer parallel light tube (1)
Light, prism of corner cube (4) is placed in front of parallel light tube (1), and prism of corner cube (4) is back to laser beam analyzer (3-2) from quasi-optical
On, the revolution facula position of prism of corner cube (4) is observed by laser beam analyzer (3-2)；
Prism of corner cube (4) 1-3) is placed on the different location in front of optical axis transfer parallel light tube (1), observation prism of corner cube (4)
Whether revolution facula position changes, if position changes, then adjusts the light of single mode optical fiber in fiber ring laser system (3-3)
Distance of the fine end face to the center spectroscope (3-1)；
1-4) by adjusting repeatedly, finally so that prism of corner cube (4) is at the different outlet ports of optical axis transfer parallel light tube (1)
Echo facula position is constant, which is to receive and dispatch coaxial pixel, at this time the single mode optical fiber of optical fiber laser (3-3)
The photosurface of end face and laser beam analyzer (3-2) it is equidistant be distributed in the both sides spectroscope (3-1), complete transmitting-receiving coaxial device (3)
Adjusting；
2) laser is matched with laser beam expanding system optical axis
2-1) adjust the direction of laser (6-1) in the laser transmitting system (6) for having self-checking function so that laser passes through optical axis
Transfer parallel light tube (1) converges on the coaxial pixel of transmitting-receiving of laser beam analyzer (3-2), the position of fixed laser (6-1)；
It is 2-2) that self-test prism (6-3) is fixed tentatively on laser beam expanding system (6-2)；
It 2-3) will be provided with laser beam expanding system (6-2) in the laser transmitting system (6) of self-checking function and be fixed on corresponding position, adjust
The direction of laser beam expanding system (6-2) so that the shoot laser of laser (6-1) turns by laser beam expanding system (6-2), optical axis
It after moving parallel light tube (1), still converges on the coaxial pixel of transmitting-receiving of laser beam analyzer (3-2), completes laser and laser
The matching of beam-expanding system optical axis；
3) transfer of laser beam axis
The transmitting-receiving coaxial device (3) completed 3-1) will be adjusted and be positioned over the position of focal plane that optical axis shifts parallel light tube (1)；
Before prism of corner cube (4) 3-2) is placed on optical axis transfer parallel light tube (1) again so that single mode in optical fiber laser (3-3)
Fiber exit light is after optical axis transfer parallel light tube (1) collimates, using prism of corner cube (4) autocollimatic to laser beam analyzer (3-
2) on the coaxial pixel of transmitting-receiving；
The laser (6-1) for the laser transmitting system (6) for having self-checking function 3-3) is opened, main laser light beam passes through self-test prism
After (6-3) transmission, laser beam expanding system (6-2) reflection, into optical axis transfer parallel light tube (1), has self-test work(by adjusting
The entirety of the laser transmitting system (6) of energy so that the main laser light beam of laser (6-1) outgoing converges at laser beam analyzer (3-
2) on the coaxial pixel of transmitting-receiving, the position of the fixed laser transmitting system (6) for having self-checking function；
3-4) optical signal that optical fiber laser (3-3) is introduced by single mode optical fiber generates after optical axis transfer parallel light tube (1)
The main laser light beam that directional light, the direction of the directional light and the laser transmitting system (6) for having self-checking function are emitted is mutually 180
Degree, completes the transfer of laser beam axis；
4) Laser emission and self-test light optical axis be registrated and detection
4-1) optical signal that optical fiber laser (3-3) is introduced by single mode optical fiber generates after optical axis transfer parallel light tube (1)
Directional light, which images in after entering optical axis test parallel light tube (2) on the optical axis detection CCD (5) at focal plane, and records
The imaging point；
The laser (6-1) for the laser transmitting system (6) for having self-checking function 4-2) is opened, fraction of laser light passes through self-test prism
(6-3) reflects, which likewise enters optical axis test parallel light tube (2), and self-checking system is in the adjusting stage
When, by adjusting self-test prism (6-3) so that self-test laser beam enters on the detection CCD of the optical axis at focal plane (5), and carries out
It is fixed, and record the position of the hot spot；
4-3) position deviation of two imaging faculas illustrates self-test laser light in the laser transmitting system (6) for having self-checking function
The deviation of beam and main laser light beam, corresponding angular deviation are：
Wherein：Parameter u is that two picture points detect CCD (5) relative position in optical axis, and unit um, f are the focal length of parallel light tube, unit
m。
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| CN110515059A (en) * | 2019-07-26 | 2019-11-29 | 上海卫星装备研究所 | Lidar transmit-receive optical axis matches system safety testing device under vacuum and low temperature |
| CN113340424A (en) * | 2021-06-18 | 2021-09-03 | 上海国科航星量子科技有限公司 | Device and method for detecting performance of polarized light |
| CN118347706A (en) * | 2024-06-04 | 2024-07-16 | 中国科学院上海技术物理研究所 | Measuring device for laser divergence angle of active photoelectric system and adjusting method thereof |
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