CN102621558A - Laser radar visibility meter and transceiving coaxial optical system thereof - Google Patents
Laser radar visibility meter and transceiving coaxial optical system thereof Download PDFInfo
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- CN102621558A CN102621558A CN2012100038866A CN201210003886A CN102621558A CN 102621558 A CN102621558 A CN 102621558A CN 2012100038866 A CN2012100038866 A CN 2012100038866A CN 201210003886 A CN201210003886 A CN 201210003886A CN 102621558 A CN102621558 A CN 102621558A
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Abstract
The invention relates to a laser radar visibility meter and a transceiving coaxial optical system of the laser radar visibility meter. A lens and a reflector are sequentially arranged on a subsequent light path of an outgoing beam of a laser, the center of the reflector is provided with a small hole, the outgoing beam of the laser is focused by the lens, passes through the small hole in the center of the reflector, then is coupled in a transceiving optical fiber and is guided into a telescope system for emission, an atmosphere return signal enters the transceiving optical fiber again through the telescope system, the beam is coupled by a lens group and a light filter into the transceiving optical fiber after being reflected by the reflector, the transceiving optical fiber is connected with a detector, so that the signal acquisition is fulfilled. The transceiving coaxial optical system provided by the invention can effectively avoid the problem that a non-coaxial laser radar visibility meter is level with a transceiving light path, and is not affected by any geometrical overlap factors; in addition, the transceiving coaxial structure enables the volume of the laser radar visibility meter to be small, the weight to be light and the structure to be more compact.
Description
Technical field
The present invention relates to the laser equipment technical field, specifically be meant laser visiometer transmitting-receiving optical system.
Background technology
It is little that laser radar visibility meter has a volume, the advantage that measuring accuracy is high, and can realize multi-angle, round-the-clock detection, and acquisition level and slant visibility information, aviation safety is significant for improving.
Laser radar visibility meter commonly used both at home and abroad at present adopts emission light beam and the non-coaxial design of receiving beam; The emission of lasering beam of this kind structure can not constitute a threat to signal sensor; But exist the optical axis leveling problem that makes emission light beam and receiving beam; Under ambient temperature effect, the depth of parallelism of diaxon possibly change, and causes the measurement data distortion.In addition, there is detection blind area in non-coaxial configuration, in measurement, needs to consider the influence of how much overlap factors.
Summary of the invention
Fundamental purpose of the present invention provides a kind of laser visiometer and transmitting-receiving coaxial optical system thereof; Can effectively avoid emission of non-coaxial laser radar visiometer and receiving light path leveling problem; Not influenced by how much overlap factors, and receive and dispatch coaxial structure and can make that the laser radar visibility meter volume is little, in light weight, compact conformation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of transmitting-receiving coaxial optical system of laser radar visibility meter, it comprises: focal length is f
1Lens, catoptron, the focal length that the center has aperture be f
2Lens, optical filter and focal length be f
3Lens, wherein: on the subsequent optical path of laser emitting light beam, being disposed with focal length is f
1Lens, the catoptron that the center has aperture; The laser emitting light beam is coupled into said transmitting-receiving optical fiber and imports telescopic system through said lens focus, after passing said catoptron central small hole; The atmosphere echoed signal that said telescopic system receives gets into said transmitting-receiving optical fiber once more; After passing through said mirror reflects then, be f through focal length again
2Lens convert parallel beam into, entering into focal length behind the bias light by the said parallel beam of optical filter filtering is f
3Lens and be coupled into reception optical fiber.
Preferably, to have the catoptron off-axis placement angle of aperture be 45 ° at said center.
Preferably, to be positioned at focal length be f to the optical fiber head of said transmitting-receiving optical fiber
1The focal position of lens.
Preferably, said focal length is f
2Lens, optical filter, focal length be f
3The parallel and coaxial placement of lens, three's central shaft is perpendicular to the optical axis of laser emitting light beam.
Preferably, the bandwidth of said optical filter is 0.2nm.
Preferably, to be positioned at focal length be f to the optical fiber head of said reception optical fiber
3The focal position of lens.
A kind of laser radar visibility meter; It comprises the transmitting-receiving coaxial optical system of above-mentioned any said laser radar visibility meter; Said transmitting-receiving coaxial optical system is connected with laser instrument, is connected with telescopic system, is connected with photodetector through receiving optical fiber through transmitting-receiving optical fiber through input optical fibre, and said photodetector connects embedded computer.
Preferably, the both side surface of the primary mirror of said telescopic system is coated with anti-reflection film.
The technical scheme of embodiment of the present invention has following beneficial effect: the transmitting-receiving coaxial optical system of laser radar visibility meter provided by the invention, and simple in structure, directly connect external devices through optical fiber, need not to carry out the external circuits adjustment.Efficiently solve the deficiency that the non-coaxial laser radar visiometer is influenced by the geometry overlap factor, and avoided emission and receiving light path leveling problem.The introducing of this system can make that the laser radar visibility meter volume reduces, weight reduces, structure is compact more.
Description of drawings
The transmitting-receiving coaxial optical system structural representation of the laser radar visibility meter that Fig. 1 provides for the embodiment of the invention;
The structural representation of the coaxial laser radar visiometer that Fig. 2 provides for the embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention provides a kind of transmitting-receiving coaxial optical system of laser radar visibility meter, and is as depicted in figs. 1 and 2, and this optical system is disposed with focal length on the subsequent optical path of the outgoing beam of the laser instrument 111 that input optical fibre 1 is introduced be f
1Lens 2, the catoptron 3 that the center has aperture, the laser emitting light beam focuses on through lens 2, is coupled into transmitting-receiving optical fiber 4 after passing catoptron 3 central small hole.Catoptron 3 central small hole should guarantee to make laser instrument 111 outgoing beams normally to pass through.Also enough little simultaneously, when reducing catoptron 3 reflection atmosphere echoed signals because of loss that it was caused.Transmitting-receiving is after optical fiber 4 imports telescopic system 113 with outgoing beam, expands bundle and emission by the primary mirror 9 of telescopic system 113.The atmosphere echoed signal that telescopic system 113 receives gets into transmitting-receiving optical fiber 4 once more, through after catoptron 3 reflections, is f through focal length more again
2 Lens 5 convert parallel beam into, entering into focal length behind the bias light by optical filter 6 these parallel beams of filtering is f
3 Lens 7 and be coupled into and receive optical fiber 8, receive optical fiber 8 and link to each other with photodetector 121, thus the gatherer process of completion signal.
In the above-described embodiments, preferably, the catoptron 3 off-axis placement angles that said center has aperture are 45 °, and making the change of atmosphere echoed signal optical axis direction incide focal length for 90 ° is f
2Lens 5.
In the above-described embodiments, preferably, it is f that the optical fiber head of said transmitting-receiving optical fiber 4 is positioned at focal length
1The focal position of lens 2.
In the above-described embodiments, preferably, said focal length is f
2Lens 5, optical filter 6, focal length be the lens 7 parallel placements of f3, its central shaft is perpendicular to the optical axis of the outgoing beam of laser instrument 111.
In the above-described embodiments, preferably, said optical filter 6 bandwidth are 0.2nm, with effective wiping out background light.
In the above-described embodiments, preferably, the optical fiber head of said reception optical fiber 8 is positioned at the focal position that focal length is the lens 7 of f3, with the atmosphere echoed signal lead-in light electric explorer 121 that is coupled into.
In the above-described embodiments, preferably, the both side surface of the primary mirror 9 of said telescopic system 113 is coated with anti-reflection film, the influence that the parasitic light that produces with primary mirror 9 with minimizing causes photodetector 121.
In the above-described embodiments, preferably, said system is independent integral structure, is connected with laser instrument 111, is connected with telescopic system 113, is connected with photodetector 121 through receiving optical fiber 8 through transmitting-receiving optical fiber 4 through input optical fibre 1.
As shown in Figure 2, introduce the laser radar visibility meter of receiving and dispatching coaxial optical system 112, comprising: laser transmitting-receiving unit 110, signals collecting and control module 120, wherein:
Said laser transmitting-receiving unit 110 comprises: laser instrument 111, transmitting-receiving coaxial optical system 112, telescopic system 113, said signals collecting and control module 120 comprise: photodetector 121, embedded computer 122.Transmitting-receiving coaxial optical system 112 is connected with laser instrument 111, telescopic system 113, photodetector 121 respectively through optical fiber.
Measure beginning; The outgoing beam of laser instrument 111 is through after receiving and dispatching coaxial optical system 112; Inject atmosphere by telescopic system 113, the atmosphere echoed signal that telescopic system 113 receives gets into transmitting-receiving coaxial optical system 112 once more, then leads into photodetector 121.Embedded calculating 122 links to each other with photodetector 121 with laser instrument 111, is used to control laser instrument and moves and the detector received signal is handled, and inverting visibility value is accomplished whole measurement.
The laser visiometer transmitting-receiving coaxial optical system that the foregoing description provides is simple in structure, and machining accuracy is less demanding, and cost is low; Directly connect external devices through optical fiber, need not to carry out the external circuits adjustment, very easily install; This system efficiently solves the deficiency that the non-coaxial laser radar visiometer is influenced by the geometry overlap factor, and has avoided emission and receiving light path leveling problem.Its introducing can make that the laser radar visibility meter volume reduces, weight reduces, structure is compact more.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the transmitting-receiving coaxial optical system of a laser radar visibility meter is characterized in that, comprising: focal length is f
1Lens, catoptron, the focal length that the center has aperture be f
2Lens, optical filter and focal length be f
3Lens, wherein: on the subsequent optical path of laser emitting light beam, being disposed with focal length is f
1Lens, the catoptron that the center has aperture; The laser emitting light beam is coupled into transmitting-receiving optical fiber and imports telescopic system through said lens focus, after passing said catoptron central small hole; The atmosphere echoed signal that said telescopic system receives gets into said transmitting-receiving optical fiber once more; After passing through said mirror reflects then, be f through focal length again
2Lens convert parallel beam into, entering into focal length again behind the bias light by the said parallel beam of optical filter filtering is f
3Lens and be coupled into reception optical fiber.
2. the transmitting-receiving coaxial optical system of laser radar visibility meter according to claim 1 is characterized in that the catoptron off-axis placement angle that said center has aperture is 45 °.
3. the transmitting-receiving coaxial optical system of laser radar visibility meter according to claim 1 or claim 2 is characterized in that it is f that the optical fiber head of said transmitting-receiving optical fiber is positioned at focal length
1The focal position of lens.
4. the transmitting-receiving coaxial optical system of laser radar visibility meter according to claim 1 is characterized in that said focal length is f
2Lens, optical filter, focal length be f
3The parallel and coaxial placement of lens, three's central shaft is perpendicular to the optical axis of laser emitting light beam.
5. the transmitting-receiving coaxial optical system of laser radar visibility meter according to claim 1 is characterized in that the bandwidth of said optical filter is 0.2nm.
6. the transmitting-receiving coaxial optical system of laser radar visibility meter according to claim 1 is characterized in that it is f that the optical fiber head of said reception optical fiber is positioned at focal length
3The focal position of lens.
7. laser radar visibility meter; It is characterized in that; The transmitting-receiving coaxial optical system that comprises any said laser radar visibility meter of claim 1-6; Said transmitting-receiving coaxial optical system is connected with laser instrument, is connected with telescopic system, is connected with photodetector through receiving optical fiber through transmitting-receiving optical fiber through input optical fibre, and said photodetector connects embedded computer.
8. like the said laser radar visibility meter of claim 7, it is characterized in that the both side surface of the primary mirror of said telescopic system is coated with anti-reflection film.
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Cited By (12)
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| CN103808748A (en) * | 2014-03-10 | 2014-05-21 | 江苏天瑞仪器股份有限公司 | Light-path system enabling test light path and imaging light path to be coaxial |
| CN103954955A (en) * | 2014-04-25 | 2014-07-30 | 南京先进激光技术研究院 | Synthetic-aperture laser imaging radar sending and receiving coaxial optical antennas |
| CN104898109A (en) * | 2015-05-20 | 2015-09-09 | 中国科学院合肥物质科学研究院 | Receiving-transmitting integrated cloud information measurement system with compact structure |
| CN105403877A (en) * | 2015-11-12 | 2016-03-16 | 中国科学院上海光学精密机械研究所 | Large dynamic range optical sub-field detection laser radar |
| CN104390940B (en) * | 2014-11-26 | 2017-04-26 | 中国科学技术大学先进技术研究院 | Near-infrared laser visibility meter based on upconversion single-photon detector |
| CN107102312A (en) * | 2017-06-06 | 2017-08-29 | 四川经曼光电科技有限公司 | Laser scanning measurement instrument |
| CN107290733A (en) * | 2017-06-12 | 2017-10-24 | 北京理工大学 | The laser radar centered optical system of dual-mode antenna integration |
| CN107356541A (en) * | 2017-07-21 | 2017-11-17 | 安徽庆宇光电科技有限公司 | Soot gas monitor optical scanning system |
| CN107421917A (en) * | 2017-05-17 | 2017-12-01 | 南京信息工程大学 | A kind of multifunction high-precision atmosphere visibility meter and visibility measurement method |
| CN110196418A (en) * | 2018-02-27 | 2019-09-03 | 上海银镐环境科技有限公司 | Laser radar directional light array device |
| CN110703275A (en) * | 2019-09-30 | 2020-01-17 | 深圳市速腾聚创科技有限公司 | Laser radar system and object identification method |
| CN116068525A (en) * | 2022-11-16 | 2023-05-05 | 武汉象印科技有限责任公司 | Laser radar receiving and optical coupling filtering system and filtering method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808748B (en) * | 2014-03-10 | 2017-05-17 | 江苏天瑞仪器股份有限公司 | Light-path system enabling test light path and imaging light path to be coaxial |
| CN103808748A (en) * | 2014-03-10 | 2014-05-21 | 江苏天瑞仪器股份有限公司 | Light-path system enabling test light path and imaging light path to be coaxial |
| CN103954955A (en) * | 2014-04-25 | 2014-07-30 | 南京先进激光技术研究院 | Synthetic-aperture laser imaging radar sending and receiving coaxial optical antennas |
| CN104390940B (en) * | 2014-11-26 | 2017-04-26 | 中国科学技术大学先进技术研究院 | Near-infrared laser visibility meter based on upconversion single-photon detector |
| CN104898109A (en) * | 2015-05-20 | 2015-09-09 | 中国科学院合肥物质科学研究院 | Receiving-transmitting integrated cloud information measurement system with compact structure |
| CN105403877B (en) * | 2015-11-12 | 2017-11-10 | 中国科学院上海光学精密机械研究所 | Large dynamic range optical sub-field detection laser radar |
| CN105403877A (en) * | 2015-11-12 | 2016-03-16 | 中国科学院上海光学精密机械研究所 | Large dynamic range optical sub-field detection laser radar |
| CN107421917A (en) * | 2017-05-17 | 2017-12-01 | 南京信息工程大学 | A kind of multifunction high-precision atmosphere visibility meter and visibility measurement method |
| CN107421917B (en) * | 2017-05-17 | 2024-04-19 | 南京信息工程大学 | Multifunctional high-precision atmospheric visibility meter and visibility measuring method |
| CN107102312A (en) * | 2017-06-06 | 2017-08-29 | 四川经曼光电科技有限公司 | Laser scanning measurement instrument |
| CN107290733A (en) * | 2017-06-12 | 2017-10-24 | 北京理工大学 | The laser radar centered optical system of dual-mode antenna integration |
| CN107356541A (en) * | 2017-07-21 | 2017-11-17 | 安徽庆宇光电科技有限公司 | Soot gas monitor optical scanning system |
| CN110196418A (en) * | 2018-02-27 | 2019-09-03 | 上海银镐环境科技有限公司 | Laser radar directional light array device |
| CN110703275A (en) * | 2019-09-30 | 2020-01-17 | 深圳市速腾聚创科技有限公司 | Laser radar system and object identification method |
| CN116068525A (en) * | 2022-11-16 | 2023-05-05 | 武汉象印科技有限责任公司 | Laser radar receiving and optical coupling filtering system and filtering method thereof |
| CN116068525B (en) * | 2022-11-16 | 2024-03-08 | 武汉象印科技有限责任公司 | Laser radar receiving and optical coupling filtering system and filtering method thereof |
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Application publication date: 20120801 |