Distance gate type laser 3D imaging radar system

An imaging radar and general-type technology, which is applied in the radio wave measurement system, electromagnetic wave re-radiation, utilization of re-radiation, etc., can solve the problems of blurred distance image and short action distance, and achieve easy implementation, strong device versatility, and long-distance high resolution effects

Inactive Publication Date: 2006-11-29
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In order to solve the existing problems of using continuous wave lasers for 3D imaging with short

Method used

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  • Distance gate type laser 3D imaging radar system

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specific Embodiment approach 1

[0008] Specific implementation mode one: see figure 1 , the radar system of this specific embodiment is made up of pulsed laser 6, optical transmitting antenna 7, synchronous control circuit 3, multistage variable delay generation circuit 18, multi-way switch 19, gating type ICCD 14, optical filter 15, optical The receiving antenna 17 is composed of the host controller 13. The beam emitted by the pulse laser 6 is shaped by the optical transmitting antenna 7 and then irradiated on the target. The echo beam reflected by the target is shaped and converged by the optical receiving antenna 17 and reaches the filter 15. The optical input end of the optical input port, the light beam output from the optical output end of the optical filter 15 is incident on the optical input end of the gating type ICCD 14, and the image information output end of the gating type ICCD 14 is connected to the image information input end of the host controller 13, The delay control end of the synchronous ...

specific Embodiment approach 2

[0009] Specific implementation mode two: see figure 1 The difference between this embodiment and Embodiment 1 is that the imaging device also includes a first beam splitter 8, a No. 2 shaping circuit 9, a No. 2 amplifier 10, and a No. 2 photodetector 11. The first beam splitter 8 Located between the output end of the pulsed laser 6 and the input end of the optical transmitting antenna 7, part of the light beam emitted by the pulsed laser 6 is incident on the input end of the optical transmitting antenna 7 after being split by the first beam splitter 8, and the other part is incident on the optical transmitting antenna 7. The photosensitive end of No. photodetector 11, the electrical signal output end of No. 2 photodetector 11 connects the input end of No. 2 amplifier 10, the output end of No. 2 amplifier 10 connects the input end of No. 2 shaping circuit 9, No. 2 shaping circuit The output end of 9 is connected to the initial launch time input end of the synchronous control ci...

specific Embodiment approach 3

[0010] Specific implementation mode three: see figure 1 The difference between this specific embodiment and the second specific embodiment is: the imaging device also includes a second beam splitter 16, a No. 1 photodetector 12, a No. 1 amplifier 5 and a No. 1 shaping circuit 4, and the second beam splitter 16 Located between the optical output end of the optical filter 15 and the optical input end of the gate-type ICCD 14, part of the light output from the optical output end of the optical filter 15 is incident on the gate-type ICCD after being split by the second beam splitter 16 The light input end of 14, the other part is incident on the photosensitive end of No. 1 photodetector 12, the output end of No. 1 photodetector 12 is connected the input end of No. 1 amplifier 5, and the output end of No. 1 amplifier 5 is connected No. 1 shaping circuit 4, and the output of the No. 1 shaping circuit 4 is connected to the initial receiving time input of the synchronous control circu...

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Abstract

The invention is a distance strobe type laser 3D imaging radar system, relating to a distance picture imaging radar system, where the beam emitted by pulse laser is shaped by optical transmitting aerial and then irradiate an object, the echo beam reflected from the object gets through optical receiving antenna and filter plate to light input end of stroke type ICCD, synchronous control circuit controls multistage variable delay generating circuit to output various delay signals to input end of multichannel switch and controls grid stroke of the stroke type ICCD. And adopting distance stroke for 3D imaging can adopt a high-power pulse laser and the existing stroke-type image intensifier. And it has strong device universality, easy to implement and having higher distance resolution.

Description

technical field [0001] The invention relates to a range image imaging radar system. Background technique [0002] At present, a major problem in the field of optoelectronic imaging is how to use a mature intensity-integrating device (such as CCD) to form a distance image of the target. At present, there have been reports of 3D imaging using the continuous wave method in foreign countries. Generally, the power of continuous wave lasers is much lower than that of pulsed lasers, so the working distance will be very short. Continuous wave ranging is prone to range ambiguity problems, that is, the measured values ​​corresponding to different distances are the same. Contents of the invention [0003] In order to solve the existing problems of short range and blurred range images for 3D imaging using continuous wave lasers, the present invention proposes a range-gated laser 3D imaging radar system. The invention adopts the method of distance gating to carry out 3D distance ima...

Claims

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Application Information

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IPC IPC(8): G01S17/89
Inventor 孙秀冬赵远张勇靳辰飞刘丽萍张宇唐勐陈锺贤
Owner HARBIN INST OF TECH
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