CN107727368A - A kind of device and method for demarcating focal surface of collimator tube position - Google Patents
A kind of device and method for demarcating focal surface of collimator tube position Download PDFInfo
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- CN107727368A CN107727368A CN201710950088.7A CN201710950088A CN107727368A CN 107727368 A CN107727368 A CN 107727368A CN 201710950088 A CN201710950088 A CN 201710950088A CN 107727368 A CN107727368 A CN 107727368A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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Abstract
The invention discloses a kind of device and method for demarcating focal surface of collimator tube position, the invention is based on the light splitting function of spectroscope (Beam Splitter), by laser beam analyzer with fiber end face is equidistant is fixed to spectroscope (Beam Splitter) both sides, so as to be combined into the focal plane module of a fixed transceiver.The focal plane module is positioned near focal surface of collimator tube, using level crossing auxiliary come the focal plane module of integrally-regulated transceiver so that speculum echo hot spot is minimum, and now fiber end face is in focal surface of collimator tube position with laser beam analyzer photosurface.The focal plane that the invention is applied to any parallel light tube is calibrated, simple to operate, cheap, while the field such as parallel light tube is registering with the optical axis that complete machine is can also be used for after focal plane block combiner, angle of divergence test.
Description
Technical field
The invention belongs to technical field of optical detection, more particularly to a kind of device for demarcating focal surface of collimator tube position and side
Method, apparatus structure is simple, cost is cheap, match computer fixation test software it is simple, convenient, quick, it is particularly suitable
The demarcation of focal surface of collimator tube position in the case of various；The present invention also can receive and dispatch coaxial optical axis to main passive optical system and match somebody with somebody
There is more preferable application in quasi- field.
Background technology
Laser remote sensing system is a kind of active modern photoelectric remote-sensing equipment, is traditional radio or microwave radar
(radar) to the extension of optics frequency range.On airborne and spaceborne RS, laser is with its high spatial resolution, high sensitivity, monochromaticjty
The good characteristic such as good, round-the-clock and enjoy favor, had a wide range of applications in geoscience and planetary science field.Domestic outgoing
The laser remote sensing system of exhibition mainly includes laser altimeter, laser range finder, laser radar etc..Due to the contracting of detection wavelength used
The short and reinforcement of directionality, the space of system, time resolution are obtained for very big raising, are surveyed in military affairs, space flight, the earth
Paint, engineering construction etc. suffers from being widely applied and in-depth study.
For laser remote sensing system, optical axis registration is one of key technical index of instrument, the change of optical axis registration
To change the detectivity for the system that directly influences, this requires the instrument that can have standard or equipment to test it, and and
When calibrate situation of change.And with the expansion of various optical instrument applications and the raising of application demand, to optical instrument
Stability, the requirement also more and more higher of optical axis registration accuracy, also the ground calibration and performance test of optical instrument are proposed
Higher requirement.And in practical engineering application, parallel light tube is widely used in the detection of various optical indexes, including optical axis
Test and demarcation, it is most important to the accurate calibration of focal surface of collimator tube in high-precision registration test.
Parallel light tube directly affects the inspection of optical axis as a kind of conventional optical index detection device, the accurate calibration of focal plane
Survey precision.The present invention is based on the light splitting function of spectroscope (Beam Splitter), and laser beam analyzer is equidistant with fiber end face
Be fixed to spectroscope (Beam Splitter) both sides, so as to be combined into the focal plane module of a fixed transceiver.By Jiao
Face mould block is positioned near focal surface of collimator tube, using level crossing auxiliary come the focal plane module of integrally-regulated transceiver so that
Speculum echo hot spot is minimum, and now fiber end face is in focal surface of collimator tube position with laser beam analyzer photosurface.This hair
The focal plane calibration of the bright parallel light tube being applied under any environment, and it is simple to operate, cheap, while parallel light tube and Jiao
The fields such as optical axis registration, the angle of divergence test of complete machine are can also be used for after the block combiner of face.
The content of the invention
It is an object of the invention to provide a kind of device and method for demarcating focal surface of collimator tube position.The invention is based on light splitting
The light splitting function of mirror (Beam Splitter), by laser beam analyzer with fiber end face is equidistant is fixed to spectroscope (Beam
Splitter) both sides, so as to be combined into the focal plane module of a fixed transceiver.Level crossing auxiliary is recycled integrally-regulated
The focal plane module of transceiver, the focal plane module of the transceiver is positioned near focal surface of collimator tube, regulation level crossing makes
Obtain reflection echo hot spot to image on laser beam analyzer, be imaged by the focal plane module that transceiver is adjusted along before and after focal plane
Hot spot is minimum, and now fiber end face is in focal surface of collimator tube position with laser beam analyzer photosurface.The invention is applied to appoint
The focal plane calibration of what parallel light tube, it is simple to operate, it is cheap, at the same parallel light tube with can also be used for after focal plane block combiner it is whole
The fields such as the optical axis of machine is registering, angle of divergence test
The detection means of the inventive method is as shown in Figure 1：The invention device is by being tested parallel light tube 1, transceiver
Focal plane module 2, prism of corner cube 3, plane mirror 4 form.The focal plane module 2 of described transceiver by spectroscope 2-1, carry
The laser beam analyzer 2-2 of computer, the laser 2-3 compositions of replaceable optical fiber；The wherein described laser beam analyzer with computer
2-2 and replaceable the optical fiber equidistant both sides for being fixed on spectroscope 2-1 of laser 2-3, the described light beam with computer point
Analyzer 2-2 is used to receive the signal assembled by parallel light tube, and the laser 2-3 of described replaceable optical fiber introduces optical signal,
Optical signal produces the directional light of transmitting after being tested parallel light tube 1, for producing source of parallel light；Beam analysis with computer
Computer is used to observe position of the imaging facula on laser beam analyzer in instrument 2-2.
The focal plane module 2 of described transceiver is positioned on the focal plane of parallel light tube 1, and plane mirror 4 is placed on parallel
Before light pipe 1, regulation plane mirror 4 orientation, luffing angle so that the laser 2-3 emergent lights of replaceable optical fiber are by parallel
Light pipe 1 collimate after, then by the auto-collimation of plane mirror 4 with computer laser beam analyzer 2-2 photosurface on；
Entered by the laser 2-3 of replaceable optical fiber in the light that the focal point of parallel light tube 1 is sent after spectroscope 2-1
Trip directional light is reflexing to band to the backtracking of prism of corner cube 3 to parallel light tube 1 by spectroscope 2-1 after in parallel light tube 1
Have on the laser beam analyzer 2-2 of computer.
The focal plane module 2 of described transceiver is by spectroscope 2-1, the laser beam analyzer 2-2 with computer and replaceable
The laser 2-3 compositions of optical fiber；
The laser 2-3 of the described laser beam analyzer 2-2 with computer and replaceable optical fiber is equidistant to be fixed on light splitting
Mirror 2-1 both sides, the described laser beam analyzer 2-2 with computer is used to receive the signal assembled by parallel light tube, described
The laser 2-3 of replaceable optical fiber introduce optical signal, optical signal produces the directional light of transmitting after being tested parallel light tube 1,
For producing source of parallel light；The computer of laser beam analyzer 2-2 with computer is used to observe imaging facula in laser beam analyzer
Position.
Described spectroscope 2-1 spectral region needs to cover the wavelength of optical fiber laser；Described spectroscope 2-1 is to making
With the splitting ratio of wavelength between 4：6 and 6：Between 4, light pass surface surface form deviation RMS value is less than.
The rotating accuracy of described prism of corner cube 3 is less than 3 ".
The described plating metal on surface film of plane mirror 4, its surface form deviation RMS value are less than, and the bore of plane mirror 4 is not
Less than parallel light tube bore.
In apparatus of the present invention, Jiao of parallel light tube can be aided in using the focal plane module 2 of plane mirror 4 and transceiver
Face is demarcated this method and comprised the steps of：
1) the focal plane module 2 of transceiver is assembled
● designed structure is utilized by for laser beam analyzer 2-2 of the reception signal with computer and replaceable optical fiber
Laser 2-3 be tentatively fixed on spectroscope 2-1 both sides, the regulation of the preliminary focal plane module 2 for completing transceiver；
● the focal plane module 2 for the transceiver tentatively completed is positioned near the focal plane of parallel light tube 1, opens replaceable light
Fine laser 2-3, and prism of corner cube 3 is placed on the front of parallel light tube 1, seen by the laser beam analyzer 2-2 with computer
Examine revolution hot spot position on the laser beam analyzer 2-2 with computer of prism of corner cube 3；
● prism of corner cube 3 is placed on to the diverse location in the front of parallel light tube 1, observes the revolution hot spot of prism of corner cube 3 in band
Whether the laser beam analyzer 2-2 positions for having computer change, if position changes, adjust the laser 2- of replaceable optical fiber
Distance of 3 fiber end face to spectroscope 2-1 centers
● by adjusting repeatedly, finally cause the echo hot spot position at the different outlet ports of parallel light tube 1 of prism of corner cube 3
Put constant, now the laser 2-3 of replaceable optical fiber fiber end face and laser beam analyzer 2-2 photosurface etc. with computer
Away from the regulation for being distributed in spectroscope 2-1 both sides, completing the focal plane module 2 of transceiver.The maximum variable quantity of system is Δ, then
The coaxial precision of transmitting-receiving of system is：
Wherein：Parameter u is the relative position (unit um) that picture point changes on laser beam analyzer, and f is Jiao of parallel light tube
Away from (unit m).
2) the focal plane demarcation of parallel light tube 1
● the focal plane module 2 for reconciling the transceiver completed tentatively is positioned near the focal plane of parallel light tube 1；
● before plane mirror 4 is placed on into parallel light tube 1 again, regulation plane mirror 4 orientation, luffing angle so that
The laser 2-3 emergent lights of replaceable optical fiber are after parallel light tube collimates, then by the autocollimatic of plane mirror 4 until with electricity
On the laser beam analyzer 2-2 of brain photosurface；
● the front and back position of focal plane module 2 of transceiver is adjusted near the focal plane of parallel light tube 1, by with computer
Laser beam analyzer 2-2 computer observes spot size, until regulation untill hot spot minimum, the focal plane mould of fixed transceiver
Block 2, now the laser 2-3 of replaceable optical fiber fiber end face and the laser beam analyzer 2-2 photosurface with computer are located
Then it is tested the position of focal plane of parallel light tube 1.
The characteristics of invention, is mainly reflected in：
1) the focal plane module self checking method of the transceiver of the invention is simple, measurement accuracy is high, cost is cheap.
2) the focal plane module making method of the transceiver of the invention is simple to operate, easy to learn, coordinates computer software operation letter
It is single, understandable.
3) can also be by flat by the detection of changing the wavelength of single-mode fiber to realize to different system, the present invention
The relation that row light pipe comes between measuring basis mirror, the variable quantity of the device of environmental test can also be provided.
Brief description of the drawings
Fig. 1 is the schematic diagram of the invention.
Fig. 2 is the schematic diagram of the focal plane module 2 of transceiver.
Embodiment
The embodiment of the inventive method is described in detail below in conjunction with accompanying drawing.
Main devices employed in the present invention are described as follows：
1) parallel light tube 1：Using the reflective parallel light pipe of common process, aperture of mirror of looking in the distance is 400mm, telescope focal length
For 4m, paraboloid surface type requires that RMS is better than 1/20 λ@632.8nm.
2) the focal plane module 2 of transceiver:Spectroscope 2-1 is using the model BS017's of Thorlabs companies band structure
Unpolarized Amici prism, its Specifeca tion speeification：Service band is 700-1100nm, splitting ratio 1：1, clear aperture is
20mm；Laser beam analyzer uses Spiricon companies of U.S. model SP620 light beam in laser beam analyzer 2-2 with computer
Analyzer, its Specifeca tion speeification：Service band 190nm-1100nm, pixel size 4.4um*4.4um, number of pixels 1600*
1200；Computer is common notebook computer；Optical fiber flange is using the general of Thorlabs companies in the laser 2-3 of replaceable optical fiber
Logical optical fiber flange；Single-mode fiber uses Thorlabs companies model SM600 single-mode fiber, its Specifeca tion speeification：Work
Wave band is 600-800nm；Fibre-optic mode field diameter is 4.6um@680nm, covering 125 ± 1um of core diameter, by wavelength be 550 ±
50nm；Optical fiber laser uses Thorlabs companies model LPS-PM635-FC laser diode, its Specifeca tion speeification：
Optical maser wavelength is 635nm, luminous power adjustable extent 1uw-10mw.
3) prism of corner cube 3：Using Thorlabs companies model PS971 prism of corner cube, its Specifeca tion speeification：Printing opacity
Face surface face type is better than the@632.8nm of λ/10；Rotating accuracy is less than 3 ", clear aperture 25.4mm, transparency range 400-
1100。
4) level crossing 4：Using the standard flat mirror of customization, its Specifeca tion speeification：Its surface face type is better than the@of λ/40
632.8nm, electroplate film, the clear aperture of level crossing is 400mm.
In embodiment, the dress school schematic diagram of apparatus of the present invention is as shown in figure 1, comprise the following steps that
1) the focal plane module 2 of transceiver is assembled
● designed structure is utilized by for laser beam analyzer 2-2 of the reception signal with computer and replaceable optical fiber
Laser 2-3 be tentatively fixed on spectroscope 2-1 both sides, the regulation of the preliminary focal plane module 2 for completing transceiver；
● the focal plane module 2 for the transceiver tentatively completed is positioned near the focal plane of parallel light tube 1, opens replaceable light
Fine laser 2-3, and prism of corner cube 3 is placed on the front of parallel light tube 1, seen by the laser beam analyzer 2-2 with computer
Examine revolution hot spot position on the laser beam analyzer 2-2 with computer of prism of corner cube 3；
● prism of corner cube 3 is placed on to the diverse location in the front of parallel light tube 1, observes the revolution hot spot of prism of corner cube 3 in band
Whether the laser beam analyzer 2-2 positions for having computer change, if position changes, adjust the laser 2- of replaceable optical fiber
Distance of 3 fiber end face to spectroscope 2-1 centers
● by adjusting repeatedly, finally cause the echo hot spot position at the different outlet ports of parallel light tube 1 of prism of corner cube 3
Put constant, now the laser 2-3 of replaceable optical fiber fiber end face and laser beam analyzer 2-2 photosurface etc. with computer
Away from the regulation for being distributed in spectroscope 2-1 both sides, completing the focal plane module 2 of transceiver.The maximum variable quantity of system is Δ, then
The coaxial precision of transmitting-receiving of system is：
Wherein：Parameter u is the relative position (unit um) that picture point changes on laser beam analyzer, and f is Jiao of parallel light tube
Away from (unit m).
2) the focal plane demarcation of parallel light tube 1
● the focal plane module 2 for reconciling the transceiver completed tentatively is positioned near the focal plane of parallel light tube 1；
● before plane mirror 4 is placed on into parallel light tube 1 again, regulation plane mirror 4 orientation, luffing angle so that
The laser 2-3 emergent lights of replaceable optical fiber are after parallel light tube collimates, then by the autocollimatic of plane mirror 4 to carrying computer
Laser beam analyzer 2-2 photosurface on；
● the front and back position of focal plane module 2 of transceiver is adjusted near the focal plane of parallel light tube 1, by with computer
Laser beam analyzer 2-2 computer observes spot size, until regulation untill hot spot minimum, the focal plane mould of fixed transceiver
Block 2, now the laser 2-3 of replaceable optical fiber fiber end face and the laser beam analyzer 2-2 photosurface with computer are located
Then it is tested the position of focal plane of parallel light tube 1.
Claims (6)
1. a kind of device for demarcating focal surface of collimator tube position, by be tested parallel light tube (1), transceiver focal plane module (2),
Prism of corner cube (3), plane mirror (4) composition, it is characterised in that：
The focal plane module (2) of described transceiver is positioned on parallel light tube (1) focal plane, and plane mirror (4) is placed on flat
Before row light pipe (1), regulation plane mirror (4) orientation, luffing angle so that laser (2-3) emergent light of replaceable optical fiber
After parallel light tube (1) collimation, then the light by laser beam analyzer (2-2) of plane mirror (4) auto-collimation with computer
On quick face；
Entered by the laser (2-3) of replaceable optical fiber in the light that parallel light tube (1) focal point is sent after spectroscope (2-1)
Trip directional light is passing through spectroscope (2- to prism of corner cube (3) backtracking to parallel light tube (1) after in parallel light tube (1)
1) reflex on the laser beam analyzer (2-2) with computer.
A kind of 2. device for demarcating focal surface of collimator tube position according to claim 1, it is characterised in that：Described transmitting-receiving
One focal plane module (2) by spectroscope (2-1), the laser beam analyzer (2-2) with computer and replaceable optical fiber laser
(2-3) is formed；
The laser (2-3) of the described laser beam analyzer (2-2) with computer and replaceable optical fiber is equidistant to be fixed on light splitting
The both sides of mirror (2-1), the described laser beam analyzer (2-2) with computer are used to receive the signal assembled by parallel light tube,
The laser (2-3) of described replaceable optical fiber introduces optical signal, and optical signal produces transmitting after being tested parallel light tube (1)
Directional light, for producing source of parallel light；The computer of laser beam analyzer (2-2) with computer is used to observe imaging facula in light beam
Position on analyzer.
A kind of 3. device for demarcating focal surface of collimator tube position according to claim 2, it is characterised in that：Described light splitting
The spectral region of mirror (2-1) needs to cover the wavelength of optical fiber laser；Described spectroscope (2-1) is to the splitting ratio using wavelength
Between 4：6 and 6：Between 4, light pass surface surface form deviation RMS values are less than the@632.8nm of λ/10.
A kind of 4. device for demarcating focal surface of collimator tube position according to claim 1, it is characterised in that：Described pyramid
The rotating accuracy of prism (3) is less than 3 ".
A kind of 5. device for demarcating focal surface of collimator tube position according to claim 1, it is characterised in that：Described plane
Speculum (4) plating metal on surface film, its surface form deviation RMS value are less than the@632.8nm of λ/10, and the bore of plane mirror (4) is not small
In parallel light tube bore.
A kind of a kind of 6. position of focal plane demarcation side of the device of demarcation focal surface of collimator tube position based on described in claim 1
Method, it is characterised in that method and step is as follows：
1) focal plane module (2) assembling of transceiver
Designed structure 1-1) is utilized by for laser beam analyzer (2-2) of the reception signal with computer and replaceable optical fiber
Laser (2-3) be tentatively fixed on spectroscope (2-1) both sides, the regulation of the preliminary focal plane module (2) for completing transceiver；
1-2) the focal plane module (2) for the transceiver tentatively completed is positioned near parallel light tube (1) focal plane, opened replaceable
The laser (2-3) of optical fiber, and prism of corner cube (3) is placed in front of parallel light tube (1), pass through the laser beam analyzer with computer
(2-2) observes revolution hot spot position on the laser beam analyzer (2-2) with computer of prism of corner cube (3)；
Prism of corner cube (3) 1-3) is placed on the diverse location in front of parallel light tube (1), the revolution hot spot of observation prism of corner cube (3)
Whether change in laser beam analyzer (2-2) position with computer, if position changes, adjust swashing for replaceable optical fiber
Distance of the fiber end face of light device (2-3) to spectroscope (2-1) center；
1-4) by adjusting repeatedly, finally cause prism of corner cube (3) echo hot spot at the different outlet ports of parallel light tube (1)
Position is constant, now the light of the fiber end face of the laser (2-3) of replaceable optical fiber and the laser beam analyzer (2-2) with computer
The equidistant regulation for being distributed in spectroscope (2-1) both sides, completing the focal plane module (2) of transceiver in quick face；The maximum change of system
Change amount is Δ, then the coaxial precision of the transmitting-receiving of system is：
Wherein：Parameter u is the relative position that picture point changes on laser beam analyzer, and unit um, f are the focal length of parallel light tube, single
Position m；
2) the focal plane demarcation of parallel light tube (1)
2-1) the focal plane module (2) for reconciling the transceiver completed tentatively is positioned near the focal plane of parallel light tube (1)；
Before plane mirror (4) 2-1) is placed on into parallel light tube (1) again, regulation plane mirror (4) orientation, luffing angle,
So that laser (2-3) emergent light of replaceable optical fiber arrives after parallel light tube collimates, then by plane mirror (4) autocollimatic
On the photosurface of laser beam analyzer (2-2) with computer；
Focal plane module (2) front and back position of transceiver 2-3) is adjusted near the focal plane of parallel light tube (1), by with computer
The computer of laser beam analyzer (2-2) observe spot size, until regulation untill hot spot minimum, Jiao of fixed transceiver
Face mould block (2), the now fiber end face of the laser (2-3) of replaceable optical fiber and the laser beam analyzer (2-2) with computer
Photosurface is in being the position of focal plane for being tested parallel light tube (1).
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| CN201710950088.7A CN107727368B (en) | 2017-10-13 | 2017-10-13 | Device and method for calibrating focal plane position of collimator |
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| CN201710950088.7A CN107727368B (en) | 2017-10-13 | 2017-10-13 | Device and method for calibrating focal plane position of collimator |
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| CN107727368B CN107727368B (en) | 2023-07-04 |
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Cited By (6)
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| CN109450562A (en) * | 2018-11-23 | 2019-03-08 | 长春理工大学 | Off-axis two waveband laser communication comprehensive performance testing system and method |
| CN110146257A (en) * | 2019-05-17 | 2019-08-20 | 中国科学院上海技术物理研究所 | A kind of device and method of rapid survey space laser load optical axis variation |
| CN110375962A (en) * | 2019-08-15 | 2019-10-25 | 中科院南京天文仪器有限公司 | The device and method for demarcating optical system focal plane is illuminated based on preposition boundling |
| CN110487516A (en) * | 2019-09-16 | 2019-11-22 | 南京英田光学工程股份有限公司 | Pyramid auto-collimation scanning means for parallel light tube focusing test |
| CN114266807A (en) * | 2021-12-06 | 2022-04-01 | 长春理工大学 | Method and system for detecting device with tracking and pointing functions |
| CN116296290A (en) * | 2023-03-21 | 2023-06-23 | 之江实验室 | Laser diffraction divergence angle detection method and device |
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| CN109450562A (en) * | 2018-11-23 | 2019-03-08 | 长春理工大学 | Off-axis two waveband laser communication comprehensive performance testing system and method |
| CN109450562B (en) * | 2018-11-23 | 2021-02-05 | 长春理工大学 | System and method for testing comprehensive performance of off-axis dual-waveband laser communication |
| CN110146257A (en) * | 2019-05-17 | 2019-08-20 | 中国科学院上海技术物理研究所 | A kind of device and method of rapid survey space laser load optical axis variation |
| CN110146257B (en) * | 2019-05-17 | 2024-02-20 | 中国科学院上海技术物理研究所 | Device and method for rapidly measuring change of optical axis of space laser load |
| CN110375962A (en) * | 2019-08-15 | 2019-10-25 | 中科院南京天文仪器有限公司 | The device and method for demarcating optical system focal plane is illuminated based on preposition boundling |
| CN110375962B (en) * | 2019-08-15 | 2024-05-31 | 中科院南京天文仪器有限公司 | Device and method for calibrating focal plane of optical system based on front-end cluster illumination |
| CN110487516A (en) * | 2019-09-16 | 2019-11-22 | 南京英田光学工程股份有限公司 | Pyramid auto-collimation scanning means for parallel light tube focusing test |
| CN110487516B (en) * | 2019-09-16 | 2024-05-10 | 南京英田光学工程股份有限公司 | Pyramid auto-collimation scanning device for focusing of collimator |
| CN114266807A (en) * | 2021-12-06 | 2022-04-01 | 长春理工大学 | Method and system for detecting device with tracking and pointing functions |
| CN114266807B (en) * | 2021-12-06 | 2024-09-13 | 长春理工大学 | Detection method and system for device with tracking and pointing functions |
| CN116296290A (en) * | 2023-03-21 | 2023-06-23 | 之江实验室 | Laser diffraction divergence angle detection method and device |
| CN116296290B (en) * | 2023-03-21 | 2024-02-20 | 之江实验室 | Laser diffraction divergence angle detection method and device |
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