CN104391291B - Fine particle laser radar system with adjustable focal position and self-calibration method - Google Patents
Fine particle laser radar system with adjustable focal position and self-calibration method Download PDFInfo
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- CN104391291B CN104391291B CN201410773030.6A CN201410773030A CN104391291B CN 104391291 B CN104391291 B CN 104391291B CN 201410773030 A CN201410773030 A CN 201410773030A CN 104391291 B CN104391291 B CN 104391291B
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- reflecting prism
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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
- G01S7/497—Means for monitoring or calibrating
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- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention provides a fine particle laser radar system with an adjustable focal position and a self-calibration method. The fine particle laser radar system comprises a laser, an imaging CCD (charge coupled device), a control computer, a beam expander (8), a first right-angle reflecting prism (9), a corner reflector (10), a plane mirror (11), a collimating mirror (12) and a second right-angle reflecting prism (13), wherein laser emitted by the laser passes the a beam expander (8), the first right-angle reflecting prism (9), the plane mirror (11), the corner reflector (10), a receiving optical system, the collimating mirror (12) and the second right-angle reflecting prism (13) in sequence and then reaches the imaging CCD; the imaging CCD is connected with the control computer; the control computer controls the laser. The fine particle laser radar system realizes the adjustment of a focal plane and a focal position by adjusting a main primary mirror position, and also realizes a whole set of adjustment process, from rough adjustment to fine adjustment, of the fine particle laser radar system. The self-calibration method replaces manual calibration, overcomes the problem that no target image serves as a reference point, improves the precision, and meanwhile eliminates personal errors caused by manual operation.
Description
Technical field
The present invention relates to focal position in fine particle laser radar system is adjustable and high-precision calibrating method, belong to laser
Field of radar.
Background technology
Fine particle laser radar can in real time to atmospheric aerosol backscattering coefficient, atmospheric extinction coefficient, airborne particulate
The online stereoscopic monitoring of the parameters such as amount of substance concentration, atmospheric boundary layer height, with increasing for atmospheric pollution Detection task, laser thunder
More and more important effect is played up in atmospheric science, atmospheric climate and atmospheric environment scientific research is carried out.
In order to reduce impact of the blind area to radar surveying distance, have more greatly now and all adopt coaxial-type transmitter-receiver device
And concentric transmitter-receiver device.And telescopic system is its important ingredient in reception device, receiving optics
Index also is mainly with the index of telescopic system to formulate.Jam is adopted the receiving optics of current laser radar system more
The position of the focal plane of Green's telescopic system, wherein telescope requires to be placed in before telescope primary mirror according to different radars
Side and rear.The present invention proposes that a kind of method, i.e. primary mirror position are adjustable and then reach focal position and can be adjusted as desired
It is whole, while realizing instrument versatility, also can by adjust primary mirror direction come realize the parallel i.e. focal position of primary and secondary mirror according to want
Ask and be adjusted to aperture center.Come further for the highly sophisticated device fine particle laser radar of monitoring atmospheric parameter at present
Say, the precision and measurement height of measurement are highly important.Visual field size in receiving optics directly affects the survey of instrument
Span affects saturation and the measurement of near-field signals if too little from, the angle of divergence in laser radar system in optical transmitting system
The representativeness of numerical value.The measurement height of the too big then direct instrument of the angle of divergence, the transmitting optics angle of divergence of laser radar are more than itself
Receiving optics, then the signal outside visual field will not be received by receiving optics completely, so as to cause the limit of measurement parameter
System.Focal plane position proposed by the present invention is adjustable, can directly change the angle of visual field of receiving optics, it is to avoid echo-signal
Loss strengthen measured value representativeness.
For high-accuracy measuring instrument, itself demarcate precision height directly affect measurement parameter verity and
Precision.It is much more current to adopt artificial scaling method and ccd image to be demarcated, the personal error of two-dimensional calibrations itself presence and not
Controllable Error factor is relatively more, therefore degree of regulation is low, automaticity difference the shortcomings of.And currently used CCD demarcation sides
Method, although instead of artificial demarcation, reduce personal error, but the stated accuracy brought due to lacking fixed point is not
It is very high.The present invention is demarcated using replacing aperture and with imaging CCD, and so not only cost-effective method is also simple bright
, while target can be imaged in CCD and as demarcate fixed point, we only need to demarcate target image,
The precision for so not only increasing itself demarcation is also reduced and artificially debugs the error brought.
The content of the invention
The present invention is to provide for a kind of high accuracy fine particle laser radar scaling method, the method replace it is artificial demarcate and
As a reference point without target image, precision more eliminates the personal error brought by manual operation while raising.This invention is also carried
In the receiving optics for going out, the adjustment of primary mirror position to be realizing the adjustable a kind of version in focal plane and focal position, and
The debugging process of a whole set of fine particle laser radar system from coarse adjustment to accurate adjustment is realized with above-mentioned scaling method.
The technical solution used in the present invention is：A kind of focal position is adjustable fine particle laser radar system, including laser instrument,
Imaging CCD, control computer, beam expanding lens, the first right-angle reflecting prism, corner reflector, plane mirror, collimating mirror and second straight
Corner reflection prism；Wherein receiving optics include reception system secondary mirror, reception system main body, primary mirror, adjust jackscrew, can turn down
Hole diaphragm, tension extension spring and primary mirror fixed seat；Primary mirror is fixed in primary mirror fixed seat, before and after the regulation of primary mirror is by adjusting jackscrew
Spinning in and out realize focal plane position and focal position while can adjusting the regulation of the front and back position and certain angle of primary mirror
Adjust；Tension extension spring at 6 is fixed on above reception optical bodies and primary mirror fixed seat, it is ensured that adjusting jackscrew normally can be adjusted
State；Adjustable aperture is attached using fine thread with reception system main body, requires to pass through according to receiving optics
Adjustable aperture nut is rotated in front and back to find the position of focal plane, is regarded so as to match suitable fine particle laser radar
；The laser that laser instrument sends sequentially passes through beam expanding lens, the first right-angle reflecting prism, plane mirror, corner reflector, receiving light
Imaging CCD, imaging CCD connection control computers, control computer are reached after system, collimating mirror, the second right-angle reflecting prism
Control laser instrument.
The present invention additionally provides a kind of self-calibrating method of the adjustable fine particle laser radar system in focal position, using above-mentioned
The adjustable fine particle laser radar system in focal position, open laser instrument, the laser that laser instrument sends is after beam expanding lens is expanded
The first right-angle reflecting prisms of Jing reflex to the top of receiving optics again, and anti-in the top holding plane of receiving optics
Mirror is penetrated, the dimensional turntable below corner reflector is adjusted, is enable the hot spot of reflection through corner reflector after plane mirror reflection again
Enough enter in receiving optics.Receiving optics emergent light second right-angle reflecting prisms of Jing after collimating mirror are reflexed to into
As, in CCD, imaging CCD and main control computer connect, and main control computer can control laser instrument；Specifically, it is imaged in front of CCD and pacifies
Second right-angle reflecting prism of dress adjustable two dimension precise rotating platform, now adjusts the conciliation knob below the second right-angle reflecting prism,
Complete target image can be found in the imaging CCD for making reception；Target scale value a being dimensioned is write down, this is engraved in imaging
In CCD, imaging should be fuzzy, the target position that adjustment is demarcated before and after being at this moment accomplished by, while observing target in CCD
The definition of image, finds and most clearly imaging point writes down target scale value b being dimensioned now, then before and after difference
It is exactly the numerical value offset before and after aperture focal plane；
Adjusting the second right-angle reflecting prism makes target in the image center of CCD and the very center superposition of CCD itself,
The numerical value of the X-axis and Y direction of dimensional turntable is read, the two values now write down are focal position distance center position
Distance.
Advantage is the present invention compared with prior art：
(1), for compared to present fine particle laser radar system, visual field is fixed mostly or changes aperture
Changing the size of visual field, the position of present invention debugging primary mirror not only can automatically adjust the size of visual field more to size according to demand
Automatically can further be adjusted, be improved the precision and reliability of instrument test data.
(2), by changing with graduated target providing focal position adjustable reference picture, the cross of target itself
The numerical value above turntable more can be accurately read at graduation center, accurately adjustable so as to reach focal position and focal plane position
The measurable purpose in focal position is realized more simultaneously.
Description of the drawings
Fig. 1 is the adjustable mode in focal position in receiving optics in Cassegrain telescope of the present invention, wherein, 1 is to connect
Receipts system secondary mirror, 2 is reception system main body, and 3 is primary mirror, and 4 to adjust jackscrew, and 5 is adjustable aperture, and 6 is to tense extension spring, 7
For primary mirror fixed seat；
Fig. 2 is target pattern diagram；
Fig. 3 is axis reflector formula radar transmit-receive system light path figure, wherein, 2 is reception system main body, and 5 is adjustable aperture light
Door screen, 8 is beam expanding lens, and 9 is the first right-angle reflecting prism, and 10 is corner reflector, and 11 is plane mirror, and 12 is collimating mirror, and 13 are
Second right-angle reflecting prism.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment further illustrates the present invention.
Fine particle laser radar receiving optics principle schematic diagram. that focal position is adjustable is as shown in figure 1, receiving light
System includes reception system secondary mirror 1, reception system main body 2, primary mirror 3, regulation jackscrew 4, adjustable aperture 5, tension extension spring
6th, primary mirror fixed seat 7 is constituted.The primary mirror 3 of receiving optics is fixed in the primary mirror fixed seat 7 of receiving optics, primary mirror
3 regulation adjusts the front and back position and certain angle of the primary mirror 3 of receiving optics by spinning in and out before and after regulation jackscrew 4
Regulation, realize focal plane position and focal position while adjustable.Tension extension spring 6 at 6 is fixed on reception system main body 2 and master
Above mirror fixed seat 7, it is ensured that adjusting jackscrew 4 being capable of normal adjustment state.Adjustable aperture 5 is adopted with reception system main body 2
It is attached with fine thread, requires by rotating 5 nut of adjustable aperture in front and back to find Jiao according to receiving optics
The position of plane, so as to match suitable fine particle laser radar visual field.
Based on high-precision laser radar automatic calibration system principle schematic diagram. as shown in figure 3, fine particle laser thunder
Mainly include computer, optical transmitting system, debugging right-angle reflecting prism component, receiving optics up to system and receive signal
The CCD in source etc. is constituted.Specifically, should be included based on high-precision laser radar automatic calibration system：Laser instrument, is imaged CCD, control
Computer processed, receiving optics, beam expanding lens 8, the first right-angle reflecting prism 9, corner reflector 10, plane mirror 11, collimation
Mirror 12, the second right-angle reflecting prism 13, the adjustable aperture 5 in receiving optics are replaced with the target being dimensioned
Mark, target pattern are as shown in Figure 2.
Self-calibration step：
Laser instrument is opened, the first right-angle reflecting prisms of Jing 9 reflect the laser that laser instrument sends again after beam expanding lens 8 is expanded
To the top of receiving optics, and in the top holding plane reflecting mirror 11 of receiving optics, plane mirror 11 reflects
Reflect through corner reflector 10 again afterwards, adjust the dimensional turntable below corner reflector 10, the hot spot of reflection is entered and receive
In optical system.Receiving optics emergent light second right-angle reflecting prisms of Jing 13 after collimating mirror 12 reflex to imaging CCD
In, CCD and main control computer connection are imaged, main control computer can control laser instrument.Specifically, installing in front of imaging CCD can
The second right-angle reflecting prism 13 of two-dimensional precision rotating platform is adjusted, the adjusting knob below the second right-angle reflecting prism 13 is now adjusted,
Complete target image can be found in the imaging CCD for making reception.Target scale value a being dimensioned is write down, this is engraved in imaging
In CCD, imaging should be fuzzy, the target position that adjustment is demarcated before and after being at this moment accomplished by, while observing target in CCD
The definition of image, finds and most clearly imaging point writes down target scale value b being dimensioned now, then before and after difference
It is exactly the numerical value offset before and after aperture focal plane.
Adjusting the second right-angle reflecting prism 13 makes target heavy with ten branch centers of CCD itself at the image center of CCD
Close, read the numerical value of the X-axis and Y direction of dimensional turntable, the two values now write down are focal position distance center position
The distance put.
Non-elaborated part of the present invention belongs to the known technology of those skilled in the art.
Claims (1)
1. a kind of self-calibrating method of the adjustable fine particle laser radar system in focal position, is swashed using the adjustable fine particle in focal position
Optical detection and ranging system, including laser instrument, are imaged CCD, control computer, beam expanding lens (8), the first right-angle reflecting prism (9), corner reflection
Device (10), plane mirror (11), receiving optics, collimating mirror (12) and the second right-angle reflecting prism (13)；Wherein receive
Optical system includes reception system secondary mirror (1), reception system main body (2), primary mirror (3), regulation jackscrew (4), adjustable aperture
(5) extension spring (6) and primary mirror fixed seat (7) are tensed,；Primary mirror (3) is fixed in primary mirror fixed seat (7), and the regulation of primary mirror (3) is by adjusting
Spinning in and out before and after section jackscrew (4) realize focal plane position adjusting the regulation of the front and back position and certain angle of primary mirror (3)
It is simultaneously adjustable with focal position；Tense extension spring (6) and be fixed on reception system main body (2) and primary mirror fixed seat (7) above, it is ensured that adjust
Section jackscrew (4) being capable of normal adjustment state；Adjustable aperture (5) is carried out using fine thread with reception system main body (2)
Connection, requires by rotating adjustable aperture (5) nut in front and back to find the position of focal plane according to receiving optics, from
And match suitable fine particle laser radar visual field；It is anti-that the laser that laser instrument sends sequentially passes through beam expanding lens (8), the first right angle
Penetrate prism (9), plane mirror (11), corner reflector (10), receiving optics, collimating mirror (12), the second right angle reflection rib
Mirror (13) reaches imaging CCD, imaging CCD connection control computers, control computer control laser instrument afterwards；It is characterized in that：Beat
Laser instrument is driven, the first right-angle reflecting prisms of Jing (9) reflex to reception to the laser that laser instrument sends again after beam expanding lens (8) is expanded
The top of optical system, and behind top holding plane reflecting mirror (11) of receiving optics, plane mirror (11) reflection
Reflect through 45° angle reflector (10) again, adjust the dimensional turntable below corner reflector (10), the hot spot of reflection is entered
In receiving optics, receiving optics emergent light is reflexed to by the second right-angle reflecting prism (13) through collimating mirror (12)
In imaging CCD, imaging CCD and main control computer connect, and main control computer can control laser instrument；In receiving optics can
Adjust aperture (5) to be replaced with the target being dimensioned, specifically, adjustable two dimension precise rotating platform is installed in front of imaging CCD
The second right-angle reflecting prism (13), now adjust the conciliation knob below the second right-angle reflecting prism (13), make reception into
As complete target image can be found in CCD；Target scale value a being dimensioned is write down, this is engraved in formed by imaging CCD
As should be fuzzy, the target position that adjustment is demarcated before and after being at this moment accomplished by, while observing the clear of target image in CCD
Degree, finds and most clearly imaging point writes down target scale value b being dimensioned now, then before and after difference be exactly aperture light
The numerical value offset before and after late focal plane；
Adjusting the second right-angle reflecting prism (13) makes target in the image center of CCD and the very center superposition of CCD itself,
The numerical value of the X-axis and Y direction of dimensional turntable is read, the two values now write down are focal position distance center position
Distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410773030.6A CN104391291B (en) | 2014-12-14 | 2014-12-14 | Fine particle laser radar system with adjustable focal position and self-calibration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410773030.6A CN104391291B (en) | 2014-12-14 | 2014-12-14 | Fine particle laser radar system with adjustable focal position and self-calibration method |
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| Publication Number | Publication Date |
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| CN104391291A CN104391291A (en) | 2015-03-04 |
| CN104391291B true CN104391291B (en) | 2017-04-19 |
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| CN104635760A (en) * | 2015-01-08 | 2015-05-20 | 中国科学院合肥物质科学研究院 | High-precision automatic regulating system for digital atmosphere fine-particle laser radar |
| CN105158750B (en) * | 2015-08-21 | 2017-09-29 | 中国科学院合肥物质科学研究院 | A kind of laser radar receiving telescope is with grating spectrograph with optical axis calibrator device and scaling method |
| CN106093913B (en) * | 2016-06-16 | 2017-08-08 | 武汉大学 | A kind of adjusting method of the common visual field of laser radar binary channels |
| CN106216831B (en) * | 2016-08-22 | 2018-04-27 | 大族激光科技产业集团股份有限公司 | Laser-processing system and laser focusing method |
| CN106291509B (en) * | 2016-10-12 | 2019-05-17 | 北京万集科技股份有限公司 | Laser radar optical system |
| CN107796742B (en) * | 2017-09-20 | 2020-05-15 | 中国计量科学研究院 | Device for calibrating atmospheric component concentration detection laser radar |
| CN108254736B (en) * | 2017-12-31 | 2022-05-13 | 天津木牛流马科技发展股份有限公司 | Submillimeter-level laser radar |
| CN108901118A (en) * | 2018-07-04 | 2018-11-27 | 北京大学 | Transparent target body positioning system and its localization method in a kind of lasing ion accelerator |
| CN109781141B (en) * | 2018-12-29 | 2020-10-27 | 深圳航星光网空间技术有限公司 | Calibration method and device of cubic prism group |
| CN109926711A (en) * | 2019-04-25 | 2019-06-25 | 大族激光科技产业集团股份有限公司 | A kind of method of automatic acquisition laser spot and the automatic processing unit (plant) for obtaining laser spot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591245A (en) * | 1982-07-27 | 1986-05-27 | Michael Schreiter | Focusing arrangement for a reflecting telescope |
| CN101561500A (en) * | 2008-04-15 | 2009-10-21 | 中国科学院安徽光学精密机械研究所 | Automatic laser radar collimating system |
| CN102230962A (en) * | 2011-04-08 | 2011-11-02 | 哈尔滨工业大学 | Laser radar coaxial transmitting and receiving system and coaxial adjustment method thereof |
| CN103217678A (en) * | 2013-04-01 | 2013-07-24 | 中国科学院合肥物质科学研究院 | Laser radar receiving system |
| CN203164508U (en) * | 2013-03-27 | 2013-08-28 | 四川省洪雅维国光学有限公司 | Convenient regulation type mounting device for primary mirror of reflecting telescope |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03271710A (en) * | 1990-03-20 | 1991-12-03 | Mitsubishi Electric Corp | Focal position moving device |
-
2014
- 2014-12-14 CN CN201410773030.6A patent/CN104391291B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591245A (en) * | 1982-07-27 | 1986-05-27 | Michael Schreiter | Focusing arrangement for a reflecting telescope |
| CN101561500A (en) * | 2008-04-15 | 2009-10-21 | 中国科学院安徽光学精密机械研究所 | Automatic laser radar collimating system |
| CN102230962A (en) * | 2011-04-08 | 2011-11-02 | 哈尔滨工业大学 | Laser radar coaxial transmitting and receiving system and coaxial adjustment method thereof |
| CN203164508U (en) * | 2013-03-27 | 2013-08-28 | 四川省洪雅维国光学有限公司 | Convenient regulation type mounting device for primary mirror of reflecting telescope |
| CN103217678A (en) * | 2013-04-01 | 2013-07-24 | 中国科学院合肥物质科学研究院 | Laser radar receiving system |
Non-Patent Citations (1)
| Title |
|---|
| "激光多普勒测风雷达发射与接收光学系统研究";昝兴海;《中国优秀硕士学位论文全文数据库 信息科技辑》;20120515;第2012年卷(第05期);第I136-835页 * |
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