Passive imaging system with distance measuring function and distance measuring method thereof

An imaging system and functional technology, applied in radio wave measurement systems, measurement devices, and electromagnetic wave re-radiation, etc., to achieve high-performance passive imaging and ranging functions, avoid high costs, and correct inaccurate target ranging effects.

Active Publication Date: 2014-04-30
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

[0015] In view of this, the main purpose of the present invention is to provide a passive imaging system with ranging function and its ranging method, so a...

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  • Passive imaging system with distance measuring function and distance measuring method thereof
  • Passive imaging system with distance measuring function and distance measuring method thereof
  • Passive imaging system with distance measuring function and distance measuring method thereof

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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0042] see figure 1 As shown, the passive imaging system with ranging function provided by the present invention includes a high-frequency low-energy pulse laser emitting device, a photodiode array detector imaging device, a video amplification and analog-to-digital conversion device, and digital image processing and timing generation digital processing means of which:

[0043] High-frequency low-energy pulse laser emitting device, used to emit high-frequency low-energy laser pulses, and beam expansion and shaping to achieve long-distance;

[0044] The photodiode array detector imaging device is used to receive the laser spot and background image reflected back by the target, and obtain the distance value by adjusting t...

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Abstract

The invention discloses a passive imaging system with a distance measuring function and a distance measuring method of the passive imaging system. The passive imaging system comprises a high-frequency low-energy pulse laser emitting device, a photodiode array detector imaging device, a video amplifying and analog-digital converting device and a digital processing device for digital image processing and timing sequence occurrence. The high-frequency low-energy pulse laser emitting device is used for emitting high-frequency low-energy laser pulses and expanding bundles and shaping to reach a long distance; the photodiode array detector imaging device is used for receiving laser spots and background images reflected by a target and obtaining a distance value by adjusting integral time; the video amplifying and analog-digital converting device is used for converting photogenerated charges of the photodiode array detector imaging device into voltage and digitizing analog images through a analog-digital converter; the digital processing device for digital image processing and timing sequence occurrence is used for preprocessing digital images input by the video amplifying and analog-digital converting device and extracting the target. According to the passive imaging system, high-performance passive imaging and the distance measuring function are combined.

Description

technical field [0001] The invention belongs to the technical field of laser imaging and ranging, in particular to a passive imaging system with a ranging function and a ranging method thereof. Background technique [0002] The integration capacitor and transistor resources used for ranging can realize a very short integration time window (10ns-10μs), and realize the gating function to integrate the received signal. [0003] The laser rangefinders currently on the market are all non-imaging rangefinders, which use a laser beam with a small divergence angle to irradiate the target to form a laser measurement point, and use a point detector to receive the reflected or scattered laser signal from the measurement point. Inversion obtains the target distance. Because the size of the laser spot formed when the laser is irradiated on the target is very small, it leads to the difficulty of homing, that is, it is difficult for the laser beam to aim at the target when measuring the d...

Claims

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Application Information

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IPC IPC(8): G01S17/08G01S17/89
CPCG01S7/484G01S7/4861G01S7/4863G01S17/10G01S17/89
Inventor 孔庆善崔伟王新伟周燕刘育梁
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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