CN101630009A - Laser light four-dimensional imaging device based on optical fiber image convertor and multi-slit streak tube - Google Patents
Laser light four-dimensional imaging device based on optical fiber image convertor and multi-slit streak tube Download PDFInfo
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- CN101630009A CN101630009A CN200910072690A CN200910072690A CN101630009A CN 101630009 A CN101630009 A CN 101630009A CN 200910072690 A CN200910072690 A CN 200910072690A CN 200910072690 A CN200910072690 A CN 200910072690A CN 101630009 A CN101630009 A CN 101630009A
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Abstract
A laser light four-dimensional imaging device based on an optical fiber image convertor and a multi-slit streak tube belongs to the photoelectric detection field. The imaging device solves the problem that the existing photoelectric detector can not reflect the range information of an object to be measured because the existing photoelectric detector only can distinguish the space information of a target detecting object and can not simultaneously distinguish the time information, or obtains the four-dimensional information of the object to be measured in a scanning mode but the frame frequency is lower and simultaneously the viewing field is smaller. An optical fiber group of the imaging device comprises 48*48 equal-length optical fibers; one ends of the optical fiber group are arranged on an input end panel in a 48*48 firs array A mode; and the other ends of the optical fibers are arranged on an output end panel in a 8*288 second array B mode; the output end panel is coupled with the big end of a light cone; the small end of the light cone is coupled with a photoelectricity negative pole of the multi-slit streak tube; the output end of an image intensifier is coupled with the input end of a fluorescent screen of the multi-slit streak tube. The imaging device is used for the four-dimensional imaging of objects to be detected.
Description
Technical field
The present invention relates to a kind of laser light four-dimensional imaging device based on optical fiber image transducer and many slits striped pipe, is a kind of laser light four-dimensional imaging technique, belongs to the photodetection field.
Background technology
Present various laser and infrared electro imaging system based on face formation photodetector, be widely used in geologic prospecting, forest and agricultural census, marine monitoring, road and traffic monitoring, aircraft and kept away every field such as barrier and Navigation Control, and brought into play vital role.Traditional face formation photodetector is owing to can only obtain the strength information and the two-dimensional space information of target, promptly can only obtain the two dimensional surface picture of target, this makes and to be subjected to certain restriction in actual applications, and it is the actual conditions of reflected measurement object fully sometimes; Though systems such as infrared imaging in the past or television imaging can realize intensity and planar imaging to detected object, promptly obtain the Three-dimension Target image, but because the face formation photodetector that receiving trap adopts in the system can not be realized the resolution to the time, so be difficult to obtain the range information of target, and laser imaging radar system in the past often need adopt scanning imagery mode or complicated complex imaging system to realize obtaining the target four-dimensional information, the imaging frame frequency or the visual field of this mode are less, can not satisfy the needs of various situations fully.Because the time of target detection thing and the truth that spatial information can reflect measured object, for realizing four-dimensional detection of time and space to echo signal, can realize the important symbol of time-resolved photodetector, become at present the main target of research both at home and abroad as photoelectric detector of future generation.
Summary of the invention
The objective of the invention is to differentiate and to differentiate temporal information simultaneously the spatial information of target detection thing in order to solve present photodetector, the range information that therefore can not reflect measured object, perhaps adopt scan mode to obtain the four-dimensional information of measured object but also problem of smaller of the low visual field simultaneously of frame frequency number provides a kind of laser light four-dimensional imaging device based on optical fiber image transducer and many slits striped pipe that can realize time, space and strength distinguish.
The present invention includes many slits striped pipe and light cone, it also comprises optical fiber image transducer and image intensifier, the optical fiber image transducer is made up of input end panel, optical fibre set and output terminal panel, optical fibre set is made up of 48 * 48 isometric optical fiber, one end of optical fibre set, first array A mode with 48 * 48 on the input end panel is arranged, the other end of optical fibre set second array B mode with 8 * 288 on the output terminal panel is arranged, and the arrangement mode of the first array A is:
The arrangement mode of the second array B is:
The relevant position on input end panel and output terminal panel respectively, two ends that has the same optical fiber of two code present positions representatives of identical subscript among the first array A and the second array B;
The output terminal panel of optical fiber image transducer and the big end of light cone are coupled, the photocathode of the small end of light cone and many slits striped pipe is coupled, the photocathode of many slits striped pipe is the fibre faceplate of surperficial evaporation photoelectric cathode materials, described photoelectric cathode materials are S20, GaAs or GaAsP, the photoelectron that photocathode produces incides the input end of image intensifier behind overshoot, the fluoroscopic input end of the output terminal of image intensifier and many slits striped pipe is coupled, and the video screen of many slits striped pipe is made by the short lag phosphor that is 1ms-2ms after time.
Advantage of the present invention is:
Among the present invention many slits striped pipe and optical fiber image transducer integrated after, except can obtaining target emission or catoptrical space distribution information, can also reflect target emission or catoptrical time and intensity information, thereby distance, intensity and the spatial form that can be used for target are surveyed.At first the input end of optical fiber image transducer carries out discrete sampling to the two dimensional image of target, arrangement mode by the optical fibre set that designs among the present invention then, change in the signal distributions form of output end face and to be many stripe formula light signal, in the optical fibre set each fiber lengths equate to have guaranteed in the conversion of image and transmission course each pixel of the detection of a target range information just the mutual relationship of the temporal information of incident light is constant.Each striped formula light signal that many slits striped pipe will be input to its photocathode is converted to photoelectron, through form a plurality of striped picture outputs after focusing, deflection, the amplification on video screen.The many stripe patterns that obtain just can be expressed the distance and the strength information of each pixel on the target detection thing, just can obtain target image through image reconstruction again, can reflect the truth of measured object thus.The present invention adopts image intensifier (MCP) can realize amplification to faint optical signal, thereby has improved detector sensitivity; The present invention just can realize the four-dimensional imaging to the target detection thing by a laser flash, has improved the imaging frame frequency number of this system greatly;
The present invention adopts optical fiber image transducer and the coupling of many slits striped pipe to form the planar array detector of a 48*48 pixel, each probe unit (the corresponding unit of each optical fiber) can receive the also laser reflection signal of a part in detection of a target zone, thereby compare with the scanning type laser radar that adopted single-element detector in the past, can effectively be expanded into the field angle of picture;
The photocathode of many slits striped pipe adopts the fibre faceplate of surperficial evaporation photoelectric cathode materials, can reduce the degree that defocuses of the image of from the optical fiber image transducer, exporting, improve resolution, photoelectric cathode materials adopt S20, GaAs or GaAsP, and they have response characteristic preferably to the low level light signal of visible light wave range; Adopting after time is that the short lag phosphor of 1ms-2ms is made video screen, and can be compared with the striped pipe that adopts common phosphors more than imaging 100 width of cloth p.s., has improved imaging frame frequency, more helps realizing the high-speed inspection to moving target.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention, and Fig. 2 is the schematic diagram that many slits striped pipe obtains three dimensions and one dimension strength information, and Fig. 3 is the time resolution schematic diagram of many slits striped pipe.
Embodiment
Embodiment one: below in conjunction with Fig. 1, Fig. 2 and Fig. 3 illustrate present embodiment, present embodiment comprises many slits striped pipe 1 and light cone 2, it also comprises optical fiber image transducer 3 and image intensifier 4, optical fiber image transducer 3 is by input end panel 3-1, optical fibre set 3-2 and output terminal panel 3-3 form, optical fibre set 3-2 is made up of 48 * 48 isometric optical fiber, the end of optical fibre set 3-2 first array A mode with 48 * 48 on input end panel 3-1 is arranged, the other end of optical fibre set 3-2 second array B mode with 8 * 288 on output terminal panel 3-3 is arranged, and the arrangement mode of the first array A is:
The arrangement mode of the second array B is:
The relevant position on input end panel 3-1 and output terminal panel 3-3 respectively, two ends that has the same optical fiber of two code present positions representatives of identical subscript among the first array A and the second array B;
The arrangement mode of the second array B is: is eight groups with 48 line codes among the first array A by six behaviors, one component, six line translations in every group are the delegation among the second array B, the row of six in every group according to from left to right, from top to bottom order arranges in the second array B and is delegation.
The output terminal panel 3-3 of optical fiber image transducer 3 and the big end of light cone 2 are coupled, the photocathode of the small end of light cone 2 and many slits striped pipe 1 is coupled, the photocathode of many slits striped pipe 1 is the fibre faceplate of surperficial evaporation photoelectric cathode materials, described photoelectric cathode materials are S20, GaAs or GaAsP, the photoelectron that photocathode produces is through inciding behind the overshoot on the image intensifier 4, after amplifying, image intensifier 4 incides imaging on the video screen, the input end of the video screen 1-1 of the output terminal of image intensifier 4 and many slits striped pipe 1 is coupled, and the video screen 1-1 of many slits striped pipe 1 is made by the short lag phosphor that is 1ms-2ms after time.
The making of optical fiber image transducer 3: the corresponding respectively stationkeeping that presets on input end panel 3-1 and the output terminal panel 3-3 that is placed in the two ends of every optical fiber among the optical fibre set 3-2 is good, then optical fibre set 3-2, input end panel 3-1 and output terminal panel 3-3 are placed on the optical polish machine together and grind, each fiber end face until two ends grinds smooth smooth.Can pack into the protection sleeve of a circle of optical fiber image transducer 3 is used for fixing.
The big small end of light cone 2 is coupled by optical cement with the output terminal of optical fiber image transducer 3 and the photocathode of many slits striped pipe 1 respectively, dismantled and assembled, replaceable, convenient fine setting; Image intensifier 4 is used for faint photosignal is strengthened, and is close to the formula coupling between the input end of the video screen 1-1 of its output terminal and many slits striped pipe 1.
The electron-optical system of many slits striped pipe 1 generally is made up of photocathode, acceleration aperture plate, focusing system, anode, deflecting plate, image intensifier (MCP) 4 and video screen 1-1, the about 139-141mm in interval between photocathode and the deflecting plate, the about 30mm of the length of deflecting plate, distance is approximately 150mm between deflecting plate and the video screen, deflecting plate is controlled the deflection speed of electronics by the variation of control voltage, makes the time 90ns-1800ns all over the screen of the video screen 1-1 of many slits striped pipe 1.
Principle of work:
As shown in Figure 2, if many slits striped pipe 1 is on the quiescent operation mode, can only become the two-dimensional space picture to add one dimension intensity picture again, article three, slit S1, S2, the image space of the picture of S3 on video screen 1-1 is respectively I1, I2, I3, when many slits striped pipe 1 is operated in the dynamic mode that is added with time dependent voltage on the deflecting plate, such as wanting 2 P1 on the detection of a target, fore-and-aft distance δ between the P2, can set P1, the light of the last reflection of P2 enters slit S1 respectively, S2, under dynamic mode, the picture of slit deviates to I11 respectively, I21, the position of I31, be that the distance that the picture of P1 and P2 departs from static position respectively is respectively y1 and y2, thus between P1 and the P2 apart from δ=c (y2-y1)/v, wherein c is a light speed in a vacuum, v is the dynamic translational speed of the stripe pattern of many slits striped pipe 1, has realized the detection of third dimension spatial information (being range information) thus.
Shown in Figure 3, E represents trigger pip, F represents deflection voltage, G represents incident optical signal, loads the slope deflection voltage of linear change in time on deflecting plate, because the different electronic impulse that enters the deflecting plate opposed area constantly is subjected to the effect of different deflection voltages, when electronic impulse arrives video screen 1-1, to launch along the direction perpendicular to slit, therefore this direction can obtain containing the striped picture of temporal information corresponding to time shaft on video screen 1-1.
Because many slits striped pipe 1 can launch to the linear amplification of incident light and at dynamic mode fall time direction of principal axis, therefore under the dynamic mode of many slits striped pipe 1, can obtain the intensity picture and the distance images of target simultaneously.The photoelectron that many slits striped pipe 1 produces amplifies the enhancing back through image intensifier 4 and finally arrives on the video screen 1-1, and the image of acquisition just can be represented the distance and the strength information of each pixel on the target.Because the image of many slits striped pipe 1 output is many stripe picture, it is the image that the target image discretize rearranges afterwards, therefore must look like to carry out inverse transformation to these stripeds according to the discrete rule of resetting of 3 pairs of target images of optical fiber image transducer, be referred to as reduction, could obtain the true picture of target.The image that obtains is converted into the digital signal image, pass through suitable pre-service again, behind the correcting distortion, the gray scale of each point has just been represented the intensity picture of each pixel on the video screen, can inverting obtain the target range that each pixel is represented according to distance-time reversal algorithm, obtain the distance images and the intensity picture of target at last through the image transformation reduction.
The end that input end panel 3-1 goes up optical fibre set 3-2 adopts the square arrangement mode of the first array A to arrange, and input picture is carried out spatial sampling, and the energy that incides each optical fiber is directly proportional with input picture intensity at that point.When image distortion or distortion appear in light cone 2 or many slits striped pipe 1, be that slit image is when distortion occurring, can not directly carry out image transformation to obtain target image to the image that obtains, the imaging results of the optical fiber image transducer 3 of the two kinds of forms of array by 48 * 48 the first array A being transformed to 8 * 288 the second array B and 9 * 256 is respectively carried out the emulation contrast, obtained the conclusion of the second array B better effects if of employing 8 * 288, light cone 2 or 1 one-tenth image distortion of many slits striped pipe or distortion are reduced the influence degree of the final target image that obtains of system, promptly the repellence to pattern distortion is stronger, and this in addition array arrangement mode is simple.
Optical fiber image transducer 3 the target image discretize, be transformed into behind the slit image and light cone 2 couplings, because generally all the photocathode area than the slit of manying striped pipe 1 is big for the output terminal of optical fiber image transducer 3, the photocathode that therefore adopts light cone 2 that the slit image process proper proportion of output is dwindled back and many slits striped pipe 1 is coupled.
The present invention can realize non-scanning imagery, is used for various laser radar systems or monitoring system, can reduce the image error that causes owing to scanning imagery, effectively improves imaging frame frequency, reaches better monitoring or imaging effect.
Embodiment two: the difference of present embodiment and embodiment one is that the length of each optical fiber among the optical fibre set 3-2 is 10-90 centimetre.Other composition and annexation are identical with embodiment one.
Embodiment three: present embodiment and embodiment one or twos' difference is that the tapering of described light cone 2 is 3: 1.Other composition and annexation are identical with embodiment one or two.
Claims (3)
1, a kind of laser light four-dimensional imaging device based on optical fiber image transducer and many slits striped pipe, it comprises many slits striped pipe (1) and light cone (2), it is characterized in that it also comprises optical fiber image transducer (3) and image intensifier (4), optical fiber image transducer (3) is by input end panel (3-1), optical fibre set (3-2) and output terminal panel (3-3) are formed, optical fibre set (3-2) is made up of 48 * 48 isometric optical fiber, one end of optical fibre set (3-2) is gone up at input end panel (3-1) and is arranged in 48 * 48 the first array A mode, the other end of optical fibre set (3-2) is gone up at output terminal panel (3-3) and is arranged in 8 * 288 the second array B mode
The arrangement mode of the first array A is:
The arrangement mode of the second array B is:
The relevant position on input end panel (3-1) and output terminal panel (3-3) respectively, two ends that has the same optical fiber of two code present positions representatives of identical subscript among the first array A and the second array B;
The output terminal panel (3-3) of optical fiber image transducer (3) is coupled with the big end of light cone (2), the photocathode of the small end of light cone (2) and many slits striped pipe (1) is coupled, the photocathode of many slits striped pipe (1) is the fibre faceplate of surperficial evaporation photoelectric cathode materials, described photoelectric cathode materials are S20, GaAs or GaAsP, the photoelectron that photocathode produces incides the input end of image intensifier (4) behind overshoot, the input end of the video screen (1-1) of the output terminal of image intensifier (4) and many slits striped pipe (1) is coupled, and the video screen (1-1) of many slits striped pipe (1) is made by the short lag phosphor that is 1ms-2ms after time.
2, the laser light four-dimensional imaging device based on optical fiber image transducer and many slits striped pipe according to claim 1, it is characterized in that: the length of each optical fiber is 10-90 centimetre in the optical fibre set (3-2).
3, the laser light four-dimensional imaging device based on optical fiber image transducer and many slits striped pipe according to claim 1 and 2, it is characterized in that: the tapering of described light cone (2) is 3: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910072690A CN101630009A (en) | 2009-08-17 | 2009-08-17 | Laser light four-dimensional imaging device based on optical fiber image convertor and multi-slit streak tube |
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| CN200910072690A CN101630009A (en) | 2009-08-17 | 2009-08-17 | Laser light four-dimensional imaging device based on optical fiber image convertor and multi-slit streak tube |
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Cited By (11)
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| CN101806899A (en) * | 2010-05-26 | 2010-08-18 | 哈尔滨工业大学 | Striped tube UV laser imaging radar system for carrying out four-dimensional imaging on terrain and imaging method thereof |
| CN101963666A (en) * | 2010-09-20 | 2011-02-02 | 北京理工大学 | Method for correcting intensity image distortion of streak tube imaging laser radar |
| CN102253394A (en) * | 2011-04-21 | 2011-11-23 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN102508224A (en) * | 2011-11-18 | 2012-06-20 | 北京理工大学 | Device for improving imaging laser radar depth of field of multi-slit streak tube |
| CN103048652A (en) * | 2013-01-23 | 2013-04-17 | 哈尔滨工业大学 | Slit-free image streak tube with multiple electric deflection fields and imaging processing method thereof |
| 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 |
| CN107422336A (en) * | 2016-07-25 | 2017-12-01 | 北京理工大学 | A kind of variable resolution Non-scanning mode streak tube laser imaging system of the big depth of field of big visual field |
| CN107706075A (en) * | 2017-11-09 | 2018-02-16 | 中国工程物理研究院激光聚变研究中心 | A kind of multizone detection scanning image converter tube |
| CN109545640A (en) * | 2018-12-20 | 2019-03-29 | 深圳大学 | Scanning camera with electronic impulse alignment function |
| CN110146160A (en) * | 2019-06-04 | 2019-08-20 | 中国电子科技集团公司第四十四研究所 | A kind of ccd detector structure of high time resolution |
| WO2022021140A1 (en) * | 2020-07-29 | 2022-02-03 | 深圳大学 | Visible light streak tube and electron-optical imaging system |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101806899A (en) * | 2010-05-26 | 2010-08-18 | 哈尔滨工业大学 | Striped tube UV laser imaging radar system for carrying out four-dimensional imaging on terrain and imaging method thereof |
| CN101963666A (en) * | 2010-09-20 | 2011-02-02 | 北京理工大学 | Method for correcting intensity image distortion of streak tube imaging laser radar |
| CN101963666B (en) * | 2010-09-20 | 2012-08-29 | 北京理工大学 | Method for correcting intensity image distortion of streak tube imaging laser radar |
| CN102253394A (en) * | 2011-04-21 | 2011-11-23 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN102253394B (en) * | 2011-04-21 | 2012-10-24 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| CN102508224A (en) * | 2011-11-18 | 2012-06-20 | 北京理工大学 | Device for improving imaging laser radar depth of field of multi-slit streak tube |
| CN103048652A (en) * | 2013-01-23 | 2013-04-17 | 哈尔滨工业大学 | Slit-free image streak tube with multiple electric deflection fields and imaging processing method thereof |
| CN103048652B (en) * | 2013-01-23 | 2014-08-20 | 哈尔滨工业大学 | Slit-free image streak tube with multiple electric deflection fields and imaging processing method thereof |
| 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 |
| CN107422336A (en) * | 2016-07-25 | 2017-12-01 | 北京理工大学 | A kind of variable resolution Non-scanning mode streak tube laser imaging system of the big depth of field of big visual field |
| CN107706075A (en) * | 2017-11-09 | 2018-02-16 | 中国工程物理研究院激光聚变研究中心 | A kind of multizone detection scanning image converter tube |
| CN107706075B (en) * | 2017-11-09 | 2023-09-19 | 中国工程物理研究院激光聚变研究中心 | Multi-region detection scanning image converter tube |
| CN109545640A (en) * | 2018-12-20 | 2019-03-29 | 深圳大学 | Scanning camera with electronic impulse alignment function |
| CN110146160A (en) * | 2019-06-04 | 2019-08-20 | 中国电子科技集团公司第四十四研究所 | A kind of ccd detector structure of high time resolution |
| CN110146160B (en) * | 2019-06-04 | 2021-08-31 | 中国电子科技集团公司第四十四研究所 | High-time-resolution CCD detector structure |
| WO2022021140A1 (en) * | 2020-07-29 | 2022-02-03 | 深圳大学 | Visible light streak tube and electron-optical imaging system |
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