CN101876709A - Stripe pipe laser infrared radar imaging detection system - Google Patents
Stripe pipe laser infrared radar imaging detection system Download PDFInfo
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- CN101876709A CN101876709A CN2009103113439A CN200910311343A CN101876709A CN 101876709 A CN101876709 A CN 101876709A CN 2009103113439 A CN2009103113439 A CN 2009103113439A CN 200910311343 A CN200910311343 A CN 200910311343A CN 101876709 A CN101876709 A CN 101876709A
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Abstract
The invention provides a stripe pipe laser infrared radar imaging detection system and relates to a laser infrared radar polarization imaging detection system; the system solves the problems that the existing laser infrared radar imaging can not form images in a real-time manner, and intensity information and distance information of a target can not be obtained at the meantime; laser beam input by the system is incident to a beam-expanding prism through transmission of a gland laser prism and the transmission of a No.1/4 wave plate, after the laser beam is expanded by the beam-expanding prism, the laser beam is incident to a target to be tested and is scattered on the target to be tested to obtain scattered light, the scattered light is received by a telescope and is gathered to a No.2 1/4 wave plate, the light is transmitted and then is incident to a Wollaston prism, so as to obtain two beams of polarized light with vertical polarization state after the light is tranmitted by the Wollaston prism, two beams of the polarized light with vertical polarization state are respectively incident to two slits of a stripe pipe, a CCD camera is used for taking pictures to the beam in the two slits of the stripe pipe and the image is output to a computer. In the invention, the stripe pipe laser infrared radar imaging detection system is suitable for high-precision detection and recognition to the target on the military, and is suitable for hidden targets and disguised targets.
Description
Technical field
The present invention relates to a kind of laser infrared radar imaging detection system.
Background technology
General target detection system can only be obtained the partial information of target, in order to adapt in the future war to hanging down the strick precaution and the destruction of detectable threat object, especially those are through pretending or have the target of hidden ability, must develop advanced target detection system, imaging polarization detection system adapts to such needs just and grows up.This Detection Techniques can improve the identification of targets rate under mixed and disorderly background, have unique resolving ability for artificial decoy and camouflage, can improve the contrast and the sharpness of image simultaneously, and it has become a present popular research topic.
Stripe pipe laser infrared radar three-dimensional imaging technology is a kind of imaging technique of non-scanning, can obtain high-resolution distance images and intensity picture, be characterized in imaging definition height, range accuracy height, imaging frame frequency height, in addition, compare with other technique of laser imaging, this technology also has a very outstanding big field angle of advantage Zhao.Just because of these imaging characteristicses, this laser three-dimensional imaging technology be military affairs or civilian aspect very high using value is all arranged, particularly this technology can be carried out the non-scanning type laser imaging of high frame frequency three-dimensional imaging, has the present this technology of big demand very to enter the practical stage in fields such as landforms prospecting, marine monitorings in the military and space field.
If polarization is surveyed art to be applied in the striped pipe laser three-dimensional imaging system, on the basis of original strength information and range information, can obtain polarization information, as degree of polarization, depolarization degree, polarization position angle and phase change etc.Make full use of the reflection characteristic of the target that this imaging system obtains, restore the abundant information of target, then can realize, make this imaging system have the better application prospect more accurate detection of target and identification.
Aspect the polarization imaging detection, the researchist has made many-sided research both at home and abroad.W.G.Egan has carried out the research of polarization characteristic to military target such as aircraft and vehicle.The people such as Dennis H.Goldstein of Richard G.Priest of USN research department and USAF research department do measurement in the laboratory to the panel material that different colours, reflectivity and surface coating are arranged and analyze, studies show that and under this environment, use the relative photometric detection of Polarization Detection to possess advantage, if use polarization to survey and the detection of traditional irradiation simultaneously, can discern most of military targets.R.M.A.Azzam has done detail analysis and research to the polarization state of divide amplitude and dual rotary wave plate technology (DRRT:Duel Rotation Retarder Technique) Laser Measurement bundle.People such as R.A.Chipman survey on theoretical and the method at polarization and have done more deep research, labor the sum of errors of the system that surveys of polarization calibrate.L.B.Wolff has set up several models by to the polarization characteristic analysis of target reflection, has realized the high precision identification of target and cuts apart.A.D.Gleckler etc. utilize the striped pipe as detector laser polarization imaging scheme to be carried out analysis and experimental study, have merged intensity picture, distance images and degree of polarization image in one, have realized the identification to vanishing target.1997-2000, An Guangsuo researchist utilize the laser of 532nm as light source, and area array CCD is as detector, utilize in the water in the particle and water the depolarization of the object difference of shaking, primary study the polarization imaging of object in the water.Calendar year 2001, Anhui optical precision optical machinery research institute of the Chinese Academy of Sciences utilizes ground multiband CCD camera principle prototype, under the different experiments environment, adopts the linear polarization remote sensing technology, carries out experimental study, has obtained a large amount of polarization image data.In addition, people such as the Jiang Yuesong of BJ University of Aeronautics ﹠ Astronautics have proposed a kind of novel laser radar remote sensing polarized imaging system, can carry out one-shot measurement, real time imagery to target, but this system needs two ccd detectors to receive the orthogonal two-beam of polarization state respectively, and can not obtain the distance images of target.
Summary of the invention
The present invention is can not real time imagery in order to solve existing laser infrared radar imaging system, can't obtain the problem of the strength information and the range information of target simultaneously, thereby proposes a kind of stripe pipe laser infrared radar imaging detection system.
Stripe pipe laser infrared radar imaging detection system, it comprises beam expanding lens, telescope, striped pipe, CCD camera and computing machine, the light input end of described CCD camera is towards two slits of striped pipe, and the electrical signal of described CCD camera is connected with the electric signal input end of computing machine; It comprises that also polarization state produces system and polarization state analytic system, and described polarization state produces system and is made up of Glan laser prism and a quarter wave plate; The polarization state analytic system is made up of No. two quarter wave plates and wollaston prism; The laser beam of system's input obtains polarized light after Glan laser prism transmission, described polarized light is incident to quarter wave plate No. one, after a quarter wave plate transmission, be incident to beam expanding lens, after beam expanding lens expands bundle, be incident to target to be measured and obtaining scattered light after the scattering on the described target to be measured, telescope receives described scattered light and converges to quarter wave plate No. two, after described No. two quarter wave plate transmissions, be incident to wollaston prism, obtain the mutually perpendicular polarized light of two bundle polarization states after described wollaston prism transmission, the mutually perpendicular polarized light of described two bundle polarization states is incident to respectively in two slits of striped pipe.
Beneficial effect: the present invention has been applied to polarization technology in the striped pipe laser three-dimensional imaging system, not only can obtain the strength information and the range information of target to be measured simultaneously, but also can obtain the polarization information of target to be measured, the abundant information of target to be measured, and can realize real time imagery, the contrast of the image that obtains is improved, and can realize treating more high-precision detection of measurement target and identification, especially through camouflage or hiding military target.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention.
Embodiment
Embodiment one, this embodiment is described in conjunction with Fig. 1, stripe pipe laser infrared radar imaging detection system, it comprises beam expanding lens 5, telescope 7, striped pipe 11, CCD camera 12 and computing machine 13, the light input end of described CCD camera 12 is towards two slits of striped pipe 11, and the electrical signal of described CCD camera 12 is connected with the electric signal input end of computing machine 13; It comprises that also polarization state produces system 4 and polarization state analytic system 10, and described polarization state produces system 4 and is made up of Glan laser prism 2 and a quarter wave plate 3; Polarization state analytic system 10 is made up of No. two quarter wave plates 8 and wollaston prism 9; The laser beam of system's input obtains polarized light after 2 transmissions of Glan laser prism, described polarized light is incident to quarter wave plate 3 No. one, after quarter wave plate 3 transmissions, be incident to beam expanding lens 5, after beam expanding lens 5 expands bundle, be incident to target to be measured and obtaining scattered light after the scattering on the described target to be measured, telescope 7 receives described scattered light and converges to quarter wave plate 8 No. two, after described No. two quarter wave plate 8 transmissions, be incident to wollaston prism 9, obtain the mutually perpendicular polarized light of two bundle polarization states after described wollaston prism 9 transmissions, the mutually perpendicular polarized light of described two bundle polarization states is incident to respectively in two slits of striped pipe 11.
Principle of work: the laser beam of system's input directly enters polarization state and produces system 4, and polarization state produces system 4 and produced circularly polarized light, and its Stokes vector is:
。The light beam that produces system's 4 outgoing from polarization state incides on the target 6 to be measured by the fan beam that beam expanding lens 5 produces, and the Stokes vector of the scattered light of target 6 to be measured is (for convenience of calculation, disregarding light intensity attenuation):
The anti-damage threshold height of Glan laser polarization prism is applicable to high power laser, and polarization characteristic is good, and extinction ratio is less than 5 * 10
-6A quarter wave plate is a zero-th order waveplates, and the high anti-damage threshold value is insensitive to temperature and wavelength.
The present invention is other angles by adjusting 3 fast angles with the plane of incidence of Glan laser prism 2 of a quarter wave plate, makes laser produce elliptically polarized lights through polarization state generator 4 backs, obtains multi-form degree of polarization accordingly.
Can select the different cylindrical mirrors of bundle angle that expand as beam expanding lens according to the different image-forming ranges and the size of target among the present invention.
The difference of embodiment two, this embodiment and embodiment one described stripe pipe laser infrared radar imaging detection system is that the light transmission shaft of Glan laser prism 2 is parallel with the plane of incidence of Glan laser prism 2.
The difference of embodiment three, this embodiment and embodiment two described stripe pipe laser infrared radar imaging detection systems is that the fast axle of a quarter wave plate 3 is 45 ° with the angle of the angle of the plane of incidence of Glan laser prism 2.
The difference of embodiment four, this embodiment and embodiment three described stripe pipe laser infrared radar imaging detection systems is that the fast axle of No. two quarter wave plates 8 is 135 ° with the angle of the angle of the plane of incidence of wollaston prism 9.
The difference of embodiment five, this embodiment and embodiment one, two, three or four described stripe pipe laser infrared radar imaging detection systems is that the wavelength of the laser beam of system's input is 532nm, and pulsewidth is 10ns.
The difference of embodiment six, this embodiment and embodiment five described stripe pipe laser infrared radar imaging detection systems is that the laser beam of system's input is sent by the Nd:YAG laser instrument.
The difference of embodiment seven, this embodiment and embodiment one, two, three, four or six described stripe pipe laser infrared radar imaging detection systems is that telescope 7 is a refracting telescope.
Claims (7)
1. stripe pipe laser infrared radar imaging detection system, it comprises beam expanding lens (5), telescope (7), striped pipe (11), CCD camera (12) and computing machine (13), the light input end of described CCD camera (12) is towards two slits of striped pipe (11), and the electrical signal of described CCD camera (12) is connected with the electric signal input end of computing machine (13); It is characterized in that: further comprising polarization state and produce system (4) and polarization state analytic system (10), described polarization state produces system (4) and is made up of a Glan laser prism (2) and a quarter wave plate (3); Polarization state analytic system (10) is made up of No. two quarter wave plates (8) and wollaston prism (9); The laser beam of system's input obtains polarized light after Glan laser prism (2) transmission, described polarized light is incident to a quarter wave plate (3), after a quarter wave plate (3) transmission, be incident to beam expanding lens (5), after beam expanding lens (5) expands bundle, be incident to target to be measured and obtaining scattered light after the scattering on the described target to be measured, telescope (7) receives described scattered light and converges to No. two quarter wave plates (8), after described No. two quarter wave plates (8) transmission, be incident to wollaston prism (9), obtain the mutually perpendicular polarized light of two bundle polarization states after described wollaston prism (9) transmission, the mutually perpendicular polarized light of described two bundle polarization states is incident to respectively in two slits of striped pipe (11).
2. stripe pipe laser infrared radar imaging detection system according to claim 1 is characterized in that the light transmission shaft of Glan laser prism (2) is parallel with the plane of incidence of Glan laser prism (2).
3. stripe pipe laser infrared radar imaging detection system according to claim 2 is characterized in that fast angle with the angle of the plane of incidence of Glan laser prism (2) of a quarter wave plate (3) is 45 °.
4. stripe pipe laser infrared radar imaging detection system according to claim 3 is characterized in that fast angle with the angle of the plane of incidence of wollaston prism (9) of No. two quarter wave plates (8) is 135 °.
5. according to claim 1,2,3 or 4 described stripe pipe laser infrared radar imaging detection systems, it is characterized in that the wavelength of the laser beam of system's input is 532nm, pulsewidth is 10ns.
6. stripe pipe laser infrared radar imaging detection system according to claim 5 is characterized in that the laser beam of system's input is sent by the Nd:YAG laser instrument.
7. according to claim 1,2,3,4 or 6 described stripe pipe laser infrared radar imaging detection systems, it is characterized in that telescope (7) is a refracting telescope.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253394A (en) * | 2011-04-21 | 2011-11-23 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN102253393A (en) * | 2011-04-21 | 2011-11-23 | 北京理工大学 | Multispectral streak tube laser radar polarization imaging device |
| CN102901957A (en) * | 2012-09-25 | 2013-01-30 | 北京理工大学 | Receiving device for three-dimensional (3D) multispectral detection of stripe tube laser radar |
| CN105425226A (en) * | 2015-12-22 | 2016-03-23 | 哈尔滨工业大学 | Method for matching optimal signal width in streak-tube imaging laser radar |
| CN105759248A (en) * | 2015-12-01 | 2016-07-13 | 中国科学院上海技术物理研究所 | Radar data processing device and signal data processing method |
| CN109188395A (en) * | 2018-07-19 | 2019-01-11 | 合肥工业大学 | A kind of full polarized fringe pipe laser imaging radar device |
| CN109991620A (en) * | 2019-04-02 | 2019-07-09 | 哈尔滨工业大学（威海） | The imaging method of streak tube laser imaging radar system based on cathode gating |
| CN110091056A (en) * | 2019-05-29 | 2019-08-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of laser processing device and method |
| CN110275154A (en) * | 2019-07-05 | 2019-09-24 | 哈尔滨工业大学 | A kind of laser radar Polarization Detection optics regulating mechanism |
| CN110441784A (en) * | 2019-08-27 | 2019-11-12 | 浙江舜宇光学有限公司 | Depth image imaging system and method |
| CN112965080A (en) * | 2021-02-04 | 2021-06-15 | 郜键 | Flash type slit-free stripe camera laser area array imaging method, system and device |
| CN114636684A (en) * | 2022-05-20 | 2022-06-17 | 深圳市帝迈生物技术有限公司 | Flow-type fluorescence analysis apparatus |
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2009
- 2009-12-14 CN CN2009103113439A patent/CN101876709A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253393A (en) * | 2011-04-21 | 2011-11-23 | 北京理工大学 | Multispectral streak tube laser radar polarization imaging device |
| CN102253394B (en) * | 2011-04-21 | 2012-10-24 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN102253394A (en) * | 2011-04-21 | 2011-11-23 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN102901957A (en) * | 2012-09-25 | 2013-01-30 | 北京理工大学 | Receiving device for three-dimensional (3D) multispectral detection of stripe tube laser radar |
| CN105759248B (en) * | 2015-12-01 | 2019-04-02 | 中国科学院上海技术物理研究所 | A kind of radar data processing unit and signal-data processing method |
| CN105759248A (en) * | 2015-12-01 | 2016-07-13 | 中国科学院上海技术物理研究所 | Radar data processing device and signal data processing method |
| CN105425226A (en) * | 2015-12-22 | 2016-03-23 | 哈尔滨工业大学 | Method for matching optimal signal width in streak-tube imaging laser radar |
| CN109188395A (en) * | 2018-07-19 | 2019-01-11 | 合肥工业大学 | A kind of full polarized fringe pipe laser imaging radar device |
| CN109991620A (en) * | 2019-04-02 | 2019-07-09 | 哈尔滨工业大学（威海） | The imaging method of streak tube laser imaging radar system based on cathode gating |
| CN110091056A (en) * | 2019-05-29 | 2019-08-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of laser processing device and method |
| CN110275154A (en) * | 2019-07-05 | 2019-09-24 | 哈尔滨工业大学 | A kind of laser radar Polarization Detection optics regulating mechanism |
| CN110441784A (en) * | 2019-08-27 | 2019-11-12 | 浙江舜宇光学有限公司 | Depth image imaging system and method |
| CN112965080A (en) * | 2021-02-04 | 2021-06-15 | 郜键 | Flash type slit-free stripe camera laser area array imaging method, system and device |
| CN112965080B (en) * | 2021-02-04 | 2024-02-20 | 苏州奥瑞图光电科技有限公司 | Flash slit-free stripe camera laser array imaging method, system and device |
| CN114636684A (en) * | 2022-05-20 | 2022-06-17 | 深圳市帝迈生物技术有限公司 | Flow-type fluorescence analysis apparatus |
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Application publication date: 20101103 |