CN105759254A - Optical axis monitoring method and device for high precision active and passive detection system - Google Patents
Optical axis monitoring method and device for high precision active and passive detection system Download PDFInfo
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- CN105759254A CN105759254A CN201610236588.XA CN201610236588A CN105759254A CN 105759254 A CN105759254 A CN 105759254A CN 201610236588 A CN201610236588 A CN 201610236588A CN 105759254 A CN105759254 A CN 105759254A
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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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Abstract
The invention discloses an optical axis monitoring method and a device for a high precision active and passive detection system, the device comprises a laser emission system, an optical axis separation component, a common telescope, an optical axis monitoring camera, a passive imaging system and a laser receiving system. characteristics of an included angle between a prism incident light and a prism emergent light only related to the an included angle of prism reflecting surface in a incident plane are utilized, means such as the optical axis separation component, the optical axis monitoring camera and the like are introduced to the high precision multi-optical axis active and passive compound detection system, a relative relation between a laser emission optical axis and a passive imaging system optical axis is established, so that the variation conditions of the optical axises can be monitored in real time in the working process of the high precision active and passive detection system, according to the obtained optical axises variation data, the detection data can be corrected in the following data processing. According to the invention, the method and the device have advantages of high optical axis monitoring sensitivity, good self optical axis stability, mature processing and adjusting technology and the like, and can widely applied in an airborne and spaceborne high precision active and passive compound detection optoelectronic system.
Description
Technical field:
The invention belongs to active-passive composite technical field of photoelectric detection, relate to a kind of compound detection system being applied to airborne high-precision laser active probe/passively photoelectronic imaging combination with Space-borne, refer in particular to a kind of optical axis monitoring method that can be used for the main passive detection system of high accuracy and device.
Background technology:
Along with user is more and more higher to the requirement of laser mapping data precision, rely on the data that single laser radar mapping system obtains owing to accurately cannot mate with ground target, be difficult to meet the requirement of high accuracy mapping.The U.S. mates with the high accuracy of ground target to realize laser beam to solve laser radar mapping system transmitting light beam orientation problem, the high-precision laser radar mapping systems such as earth laser-measured height system (GLAS) in its development have employed the high-precision attitude positioner scheme in conjunction with substantial amounts of ground calibration control point, this not only causes the complication of laser mapping system self and ground calibration system, and lack real-time, reduce the efficiency of laser mapping system.
In solution laser radar mapping system, transmitting laser beam is active-passive composite detection system Laser Active Detection system combined with traditional imaging and passive imaging electro-optical system with a feasible program of ground scenery real-time matching problem, can realize launching laser beam by the relative matching relationship between laser transmitting system transmitting beam optical axis and passive imaging system optical axis and mate with the accurate of ground scenery.The relativeness that but may result between laser transmitting system transmitting optical axis and passive imaging system optical axis due to factors such as extraneous vibration, gravity deformation, variation of ambient temperature in practical work process changes, thus affecting the matching precision launched between laser beam and ground scenery.Propose one in the patent of Jia Jianjun et al. adopts prism of corner cube to reflect to realize the self-alignment scheme of optical axis (patent No. CN102185659B) in laser quantum communication, the program is only capable of the little scope optical axis stable situation of subsequent optical path is monitored, and it is only used for the situation of Laser emission and reception system light path altogether, it is impossible to the optical axis situation of change of monitoring transmitting-receiving paraxonic system and the optical axis situation of change of telescope self.
Summary of the invention:
For solving the real-time monitoring problem of relativeness between Laser emission optical axis and passive imaging system optical axis in high accuracy many optical axises active-passive composite detection system, the present invention proposes a kind of optical axis monitoring method for the main passive detection system of high accuracy and device, the relativeness between Laser emission optical axis and passive imaging system optical axis is set up, it is simple in real time each optical axis situation of change is monitored in the main passive detection system work process of high accuracy by introducing the means such as optical axis separation assembly and light shaft monitoring camera in systems.
The present invention adopts the technical scheme that: a kind of optical axis monitoring method for the main passive detection system of high accuracy and device, is made up of parts such as laser transmitting system 1, optical axis separation assembly 2, shared telescope 3, color separation film 4, passive imaging system 5, laser receiver system 6 and light shaft monitoring cameras 7.The laser beam that described laser transmitting system 1 is launched is divided into two bundles by the incident mirror 2-1 of optical axis separation assembly 2, get to after beam of laser 1-1 transmission in ground target, laser receiver system 6 is entered through color separation film 4 after being received by the target shared telescope 3 of diffuse-reflectance back echo signal, the signal also shared telescope 3 of simultaneously Area Objects self radiation is collected, and enters passive imaging system 5 imaging after color separation film 4 reflects.Second bundle laser 1-2 forms two light beams 1-3 and 1-4 after being reflected by the outgoing mirror 2-2 front and rear surfaces of optical axis separation assembly 2 and is incident to shared telescope 3, is received by light shaft monitoring camera 7 and passive imaging system 5 respectively.
The light beam 1-3 that the laser beam that described laser transmitting system 1 is launched is formed after being turned back by optical axis separation assembly 2 is received by light shaft monitoring camera 7, the hot spot formed is for monitoring the optical axis change of laser transmitting system 1 and shared telescope 3, light beam 1-4 is received by passive imaging system 5, and the hot spot of formation changes relatively for the optical axis monitoring laser transmitting system 1, share between telescope 3 and passive imaging system 5.
The described laser transmitting system 1 optical axis launching light beam 1-1 after incident mirror 2-1 is into θ angle with the optical axis of shared telescope 3, share the common optical pathways part that telescope 3 is passive imaging system 5, laser receiver system 6 and light shaft monitoring camera 7, the wherein optical axis coincidence of the optical axis of light shaft monitoring camera 7 and shared telescope 3, the optical axis of passive imaging system 5 and laser receiver system 6 is into θ angle with the optical axis of shared telescope 3, and passive imaging system 5 and laser receiver system 6 light path are easily separated by color separation film 4；
Described optical axis separation assembly 2 is made up of incident mirror 2-1, outgoing mirror 2-2 and structural framing 2-3, incident mirror 2-1 and outgoing mirror 2-2 is installed in an integrated structural framing 2-3, the material of structural framing 2-3 can be the low-expansion material such as titanium alloy, invar, wherein the front surface normal of incident mirror 2-1 and outgoing mirror 2-2 distinguishes at 45 ° and-45 ° with the optical axis of shared telescope 1, the rear surface opposed front face of incident mirror 2-1 has a wedge angle omega 1, meets following relation:
Wherein n is incident mirror (2-1) Refractive Index of Material, and I and I ' respectively light beam is at the angle of incidence of front surface and refraction angle, and unit is angle.
The rear surface opposed front face of outgoing mirror 2-2 has a wedge angle omega 2, meets following relation:
n·sin(I'+2ω2)=sin (I+ θ), sinI=n sinI'
Wherein n is outgoing mirror 2-2 Refractive Index of Material, and I and I ' respectively light beam is at the angle of incidence of front surface and refraction angle, and unit is angle.
Incident mirror 2-1 in described optical axis separation assembly 2 is arranged in the transmitting light path of laser transmitting system 1, and outgoing mirror 2-2 is positioned at the Receiver aperture scope of shared telescope 3.
The spectro-film of the incident mirror 2-1 front surface plating special ratios in described optical axis separation assembly 2, the anti-reflection film of the corresponding laser transmitting system wavelength of rear surface plating, the spectro-film of outgoing mirror 2-2 front surface plating special ratios, the internal reflection film of the corresponding laser transmitting system wavelength of rear surface plating.
In described optical axis monitoring method, optical axis variable quantity can be calculated as below: makes a1And a2The facula deviation amount respectively detected on the detector of light shaft monitoring camera 7 and passive imaging system 5, f1And f2The respectively focal length of the light shaft monitoring camera 7 of Accurate Calibration and passive imaging system 5, then corresponding optical axis variable quantity is respectively as follows:
Pass throughWithBetween size and Orientation relation systematic optical axis situation of change can be analyzed and judges.
It is an advantage of the current invention that: in high accuracy many optical axises active-passive composite detection system, establish the relativeness between Laser emission optical axis and passive imaging system optical axis, can realize in real time each optical axis situation of change being monitored in the main passive detection system work process of high accuracy, have that optical axis monitoring sensitivity is high, self optical axis stable is good, the features such as technical maturity are debug in processing, can be widely applied to airborne and spaceborne high accuracy active-passive composite and detect in electro-optical system.
Accompanying drawing illustrates:
Fig. 1 is described light shaft monitoring device light path schematic diagram.
Fig. 2 is the total light path schematic diagram of the optical system in embodiment.
Fig. 3 is the optical axis separation assembly three-dimensional normal axomometric drawing in embodiment.
Fig. 4 (a) is the optical axis separation assembly incidence mirror 2-1 index path in embodiment
Fig. 4 (b) is the optical axis separation assembly outgoing mirror 2-2 index path in embodiment
Detailed description of the invention:
Below in conjunction with drawings and Examples, technical scheme is described further:
As shown in Figure 2, described in the present embodiment for have employed the present invention a kind of can to the dualbeam laser ceilometer design of Optical System scheme of laser footmark Scenery Imaging, including shared telescope, visible/near infrared color separation film, imaging and passive imaging camera, laser receiver system, light shaft monitoring camera, optical axis separation assembly and laser transmitting system.System comprises the two identical assemblies of set and is distributed axisymmetricly for axis of symmetry to share telescopical optical axis, imaging and passive imaging camera, laser receiver system and light shaft monitoring camera share without burnt telescope, imaging and passive imaging camera and laser receiver system utilize and share the outer visual field of telescopical axle, light shaft monitoring camera utilizes and shares visual field on telescopical axle, imaging and passive imaging camera carries out light path with laser receiver system by visible/near infrared color separation film and separates, two set optical axis separation assemblies and laser transmitting system are positioned at telescope light path both sides, the optical axis that its optical axis overlaps imaging and passive imaging camera respectively with two is parallel.The laser beam that laser transmitting system is launched is divided into two bundles by the incident mirror of optical axis separation assembly, get to after beam of laser transmission in ground target, laser receiver system is entered through visible/near infrared color separation film after being received by the shared telescope of ground target diffuse-reflectance back echo signal, the visible light signal also shared telescope of simultaneously Area Objects self radiation is collected, and enters imaging and passive imaging camera imaging after visible/near infrared color separation film reflects.Second bundle laser forms two light beams and is incident to shared telescope after being reflected by the outgoing mirror of optical axis separation assembly, is received by imaging and passive imaging camera and light shaft monitoring camera respectively.
The systematic parameter of each several parts such as shared telescope in the present embodiment, imaging and passive imaging camera, laser receiver system and light shaft monitoring camera is as shown in the table.
θ=0.7 ° in the present embodiment, between incident mirror rear surface and the front surface of optical axis separation assembly wedge angle omega 1=0.88 °, the angle of wedge between outgoing mirror rear surface and front surface is ω 2=0.19 °, the material of incident mirror and outgoing mirror is fused quartz, refractive index at 1064nm place is 1.45, and the material of structural framing is invar.
In the present embodiment, the detector pixel size of imaging and passive imaging camera and light shaft monitoring camera is 6um, and focal length is 2600mm, and when hot spot offset by a picture dot on the detector, optical axis stable monitoring sensitivity isAccording to facula mass center algorithm, pixel subdivision then sensitivity be can further improve.
Claims (6)
1. the light shaft monitoring device for the main passive detection system of high accuracy, including laser transmitting system (1), optical axis separation assembly (2), share telescope (3), color separation film (4), passive imaging system (5), laser receiver system (6) and light shaft monitoring camera (7), it is characterised in that:
The described incident mirror (2-1) in optical axis separation assembly (2) is arranged in the transmitting light path of laser transmitting system (1), and outgoing mirror (2-2) is positioned at the Receiver aperture scope of shared telescope (3)；
The optical axis of the described laser transmitting system (1) transmitting light beam (1-1) after incident mirror (2-1) is into θ angle with the optical axis of shared telescope (3), θ is not less than 0.5 °, sharing telescope (3) is passive imaging system (5), the common optical pathways part of laser receiver system (6) and light shaft monitoring camera (7), the wherein optical axis coincidence of the optical axis of light shaft monitoring camera (7) and shared telescope (3), the optical axis of passive imaging system (5) and laser receiver system (6) is also into θ angle with the optical axis of shared telescope (3), passive imaging system (5) and laser receiver system (6) light path are easily separated by color separation film (4)；
The laser beam that described laser transmitting system (1) is launched is divided into two bundles by the incident mirror (2-1) of optical axis separation assembly (2), get in ground target after beam of laser (1-1) transmission, laser receiver system (6) is entered through color separation film (4) after being received by the target shared telescope of diffuse-reflectance back echo signal (3), the signal also shared telescope (3) of simultaneously Area Objects self radiation is collected, and enters passive imaging system (5) imaging after color separation film (4) reflects；Second bundle laser (1-2) forms two light beams (1-3) and (1-4) after being reflected by outgoing mirror (2-2) front and rear surfaces of optical axis separation assembly (2) and is incident to shared telescope (3), is received by light shaft monitoring camera (7) and passive imaging system (5) respectively.
2. a kind of light shaft monitoring device for the main passive detection system of high accuracy according to claim 1, it is characterized in that: the light beam (1-3) that the laser beam that laser transmitting system (1) is launched is formed after being turned back by optical axis separation assembly (2) is received by light shaft monitoring camera (7), the hot spot formed is used for monitoring the optical axis change of laser transmitting system (1) and shared telescope (3), light beam (1-4) is received by passive imaging system (5), the hot spot formed is used for monitoring laser transmitting system (1), the optical axis shared between telescope (3) and passive imaging system (5) changes relatively.
3. a kind of light shaft monitoring device for the main passive detection system of high accuracy according to claim 1, it is characterized in that: described optical axis separation assembly (2) is by incident mirror (2-1), outgoing mirror (2-2) and structural framing (2-3) composition, incident mirror (2-1) and outgoing mirror (2-2) are installed in an integrated structural framing (2-3), the material of structural framing (2-3) can be titanium alloy, the low-expansion materials such as invar, wherein the front surface normal of incident mirror (2-1) and outgoing mirror (2-2) distinguishes at 45 ° and-45 ° with the optical axis of shared telescope (1), the rear surface opposed front face of incident mirror (2-1) has a wedge angle omega1, meet following relation:
Wherein n is incident mirror (2-1) Refractive Index of Material, and I and I ' respectively light beam is at the angle of incidence of front surface and refraction angle；
The rear surface opposed front face of outgoing mirror (2-2) has a wedge angle omega2, meet following relation:
n·sin(I'+2ω2)=sin (I+ θ), sinI=n sinI'
Wherein n is outgoing mirror (2-2) Refractive Index of Material, and I and I ' respectively light beam is at the angle of incidence of front surface and refraction angle.
4. a kind of light shaft monitoring device for the main passive detection system of high accuracy according to claim 1, it is characterized in that: the spectro-film of described incident mirror (2-1) front surface plating special ratios, the anti-reflection film of the corresponding laser transmitting system wavelength of rear surface plating.
5. a kind of light shaft monitoring device for the main passive detection system of high accuracy according to claim 1, it is characterized in that: the spectro-film of described outgoing mirror (2-2) front surface plating special ratios, the internal reflection film of the corresponding laser transmitting system wavelength of rear surface plating.
6. a kind of optical axis monitoring method of light shaft monitoring device for the main passive detection system of high accuracy required based on profit described in 1, it is characterised in that method is as follows:
The optical axis variable quantity of detection system can be calculated as below: makes a1And a2The facula deviation amount respectively detected on the detector of light shaft monitoring camera (7) and passive imaging system (5), f1And f2The respectively focal length of light shaft monitoring camera (7) of Accurate Calibration and passive imaging system (5), then corresponding optical axis variable quantity is respectively as follows:
Pass throughWithBetween size and Orientation relation systematic optical axis situation of change can be analyzed and judges.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236588.XA CN105759254A (en) | 2016-04-15 | 2016-04-15 | Optical axis monitoring method and device for high precision active and passive detection system |
| CN201621119762.4U CN206411264U (en) | 2016-04-15 | 2016-10-13 | It is a kind of to be used for the optical axis monitoring device of the main passive detection system of high accuracy |
| CN201610893908.9A CN106443643B (en) | 2016-04-15 | 2016-10-13 | Optical axis monitoring method and device for high-precision active and passive detection system |
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| CN201610236588.XA CN105759254A (en) | 2016-04-15 | 2016-04-15 | Optical axis monitoring method and device for high precision active and passive detection system |
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| CN201610236588.XA Pending CN105759254A (en) | 2016-04-15 | 2016-04-15 | Optical axis monitoring method and device for high precision active and passive detection system |
| CN201610893908.9A Active CN106443643B (en) | 2016-04-15 | 2016-10-13 | Optical axis monitoring method and device for high-precision active and passive detection system |
| CN201621119762.4U Withdrawn - After Issue CN206411264U (en) | 2016-04-15 | 2016-10-13 | It is a kind of to be used for the optical axis monitoring device of the main passive detection system of high accuracy |
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| CN201610893908.9A Active CN106443643B (en) | 2016-04-15 | 2016-10-13 | Optical axis monitoring method and device for high-precision active and passive detection system |
| CN201621119762.4U Withdrawn - After Issue CN206411264U (en) | 2016-04-15 | 2016-10-13 | It is a kind of to be used for the optical axis monitoring device of the main passive detection system of high accuracy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108563031A (en) * | 2018-01-25 | 2018-09-21 | 北京空间机电研究所 | A kind of collimated light source can be used for the monitoring of space camera angle |
| CN109307864A (en) * | 2018-11-27 | 2019-02-05 | 上海航天测控通信研究所 | A kind of spaceborne active-passive integratedization detection device |
| CN112510470A (en) * | 2020-12-01 | 2021-03-16 | 江西省中久光电产业研究院 | Laser output module positioning switching mechanism and calibration method |
| CN112596045A (en) * | 2020-11-11 | 2021-04-02 | 中国科学院上海光学精密机械研究所 | Multi-channel transmitting device for realizing quick high-precision calibration of transmitting optical axis |
| CN114264451A (en) * | 2021-11-25 | 2022-04-01 | 中国空间技术研究院 | Real-time monitoring system and method based on common-reference optical axis included angle |
| CN116539282A (en) * | 2023-05-27 | 2023-08-04 | 星遥光宇(常州)科技有限公司 | Optical axis monitoring device |
Families Citing this family (6)
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| CN105759254A (en) * | 2016-04-15 | 2016-07-13 | 中国科学院上海技术物理研究所 | Optical axis monitoring method and device for high precision active and passive detection system |
| CN107656540B (en) * | 2017-08-30 | 2019-11-15 | 南京理工大学 | Uncooled ir and the compound circumferential scanning detection device of laser |
| CN109239908A (en) * | 2018-10-22 | 2019-01-18 | 中国科学院上海技术物理研究所 | The support device of autocollimator under a kind of extreme temperature environment |
| CN109901140B (en) * | 2019-01-30 | 2020-09-04 | 森思泰克河北科技有限公司 | Laser radar light path deviation detection method and device and terminal equipment |
| CN109945743B (en) * | 2019-03-25 | 2021-03-16 | 由春华 | Active illumination type synchronous monitoring common-caliber tracking and aiming emission system and method |
| CN113093156B (en) * | 2021-03-12 | 2023-10-27 | 昆明物理研究所 | Multi-optical axis calibration system and method for LD laser range finder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000206243A (en) * | 1999-01-07 | 2000-07-28 | Hitachi Ltd | Laser radar with automatic adjusting device for transmission/reception optical axis |
| JP3648441B2 (en) * | 2000-09-21 | 2005-05-18 | 株式会社東芝 | OPTICAL AXIS CORRECTION SYSTEM, OPTICAL AXIS MEASUREMENT MEASURING DEVICE, AND OPTICAL AXIS EQUIPMENT DEVICE WITH OPTICAL AXIS CORRECTION FUNCTION |
| DE10153094A1 (en) * | 2001-10-30 | 2003-05-15 | Bodenseewerk Geraetetech | Optical sensor with a sensor beam path and a laser emitter emitting parallel to the optical axis of the sensor beam path |
| CN102230962B (en) * | 2011-04-08 | 2012-11-28 | 哈尔滨工业大学 | Laser radar coaxial transmitting and receiving system and coaxial adjustment method thereof |
| CN102353950B (en) * | 2011-10-18 | 2013-08-28 | 中国工程物理研究院应用电子学研究所 | Laser radar optical system with optical axis calibrating function and optical axis calibrating method |
| CN105759254A (en) * | 2016-04-15 | 2016-07-13 | 中国科学院上海技术物理研究所 | Optical axis monitoring method and device for high precision active and passive detection system |
-
2016
- 2016-04-15 CN CN201610236588.XA patent/CN105759254A/en active Pending
- 2016-10-13 CN CN201610893908.9A patent/CN106443643B/en active Active
- 2016-10-13 CN CN201621119762.4U patent/CN206411264U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563031A (en) * | 2018-01-25 | 2018-09-21 | 北京空间机电研究所 | A kind of collimated light source can be used for the monitoring of space camera angle |
| CN109307864A (en) * | 2018-11-27 | 2019-02-05 | 上海航天测控通信研究所 | A kind of spaceborne active-passive integratedization detection device |
| CN112596045A (en) * | 2020-11-11 | 2021-04-02 | 中国科学院上海光学精密机械研究所 | Multi-channel transmitting device for realizing quick high-precision calibration of transmitting optical axis |
| CN112510470A (en) * | 2020-12-01 | 2021-03-16 | 江西省中久光电产业研究院 | Laser output module positioning switching mechanism and calibration method |
| CN114264451A (en) * | 2021-11-25 | 2022-04-01 | 中国空间技术研究院 | Real-time monitoring system and method based on common-reference optical axis included angle |
| CN114264451B (en) * | 2021-11-25 | 2024-05-07 | 中国空间技术研究院 | Real-time monitoring system and method based on common reference optical axis included angle |
| CN116539282A (en) * | 2023-05-27 | 2023-08-04 | 星遥光宇(常州)科技有限公司 | Optical axis monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106443643B (en) | 2023-07-04 |
| CN106443643A (en) | 2017-02-22 |
| CN206411264U (en) | 2017-08-15 |
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