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Dot matrix emitting and receiving system for non-scanning laser imaging

A laser imaging, transmitting and receiving technology, applied in the use of re-radiation, re-radiation of electromagnetic waves, radio wave measurement systems, etc., can solve the problems of uneven distribution of light energy, low utilization rate of laser energy, etc., to increase the detection distance of the system , the effect of extending the scope of application

Inactive Publication Date: 2016-11-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of non-uniform light energy distribution and low utilization rate of laser energy in the non-scanning laser imaging radar lighting system, and propose a dot matrix transmitting and receiving system for non-scanning laser imaging

Method used

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  • Dot matrix emitting and receiving system for non-scanning laser imaging
  • Dot matrix emitting and receiving system for non-scanning laser imaging
  • Dot matrix emitting and receiving system for non-scanning laser imaging

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Embodiment

[0022] A dot-matrix transmitter-receiver system for non-scanning laser imaging. like figure 1 As shown, the system includes: fiber pulse laser (1), fiber splitter (2), fiber array (3), transmitting optical system (4), plane mirror (5), receiving optical system (6), APD Area array detector (7);

[0023] The fiber pulse laser (1) can emit laser pulses with a wavelength of 915nm, a pulse width of 5ns, and a repetition frequency of 100Hz, and the optical fiber it adopts is a 62.5 / 125um standard optical fiber;

[0024] The optical fiber splitter (2) is a tapered 1-point 64-way optical fiber splitter, and the optical fiber used is a 62.5 / 125um standard optical fiber, which can divide 1-way fiber laser into 64-way optical fibers according to energy;

[0025] The optical fiber array (3) is an 8*8 square optical fiber end face formed by arranging standard 62.5 / 125um optical fibers, and the core spacing of adjacent optical fibers is 250um;

[0026] The emission optical system (4) is ...

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Abstract

The invention relates to a dot matrix emitting and receiving system for non-scanning laser imaging and belongs to the technical field of photoelectric imaging. The device comprises an optical fiber pulse laser device, an optical fiber branching device, an optical fiber array, an emitting optical system, a planar reflecting mirror, a receiving optical system and an APD plane array detector. The optical fiber pulse laser device is used for emitting a narrow pulse infrared laser beam, 64 paths of laser beams that are the same in energy are emitted out after the narrow pulse infrared laser beam goes through the optical fiber branching device, each path of the laser beam is emitted out from the optical fiber array, an end face of the optical fiber array becomes a 8*8 dot matrix pulse laser light source, the laser beams which are emitted out are imaged on an object after going through the emitting optical system and the planar reflecting mirror, and the laser beams that are reflected via the object are imaged on the APD plane array detector after being received by the receiving optical system. A problem that a non-scanning laser imaging radar illumination system is not uniform enough in light intensity distribution and low in energy utilization rate is solved, and system detection distance can be increased via the dot matrix emitting and receiving system.

Description

technical field [0001] The invention relates to a dot matrix transmitting and receiving system for non-scanning laser imaging, which belongs to the technical field of photoelectric imaging. Background technique [0002] Imaging Lidar is one of the research hotspots in the world in recent years, and it is the product of the combination of laser technology and radar technology. Imaging lidar has extremely high resolution in frequency domain, space domain and time domain, so it has been widely used in the fields of target detection, tracking, aiming and imaging recognition. The basic structure of laser imaging radar includes: laser, transmitting system, receiving optical system, photodetector, amplifier circuit, timing circuit, control and processing system. Compared with the traditional intensity image acquisition method, LiDAR can not only obtain the intensity image of the target object but also obtain the distance image of the target object. Compared with other range image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/48G01S7/484G01S7/486G01S17/89
CPCG01S7/4804G01S7/484G01S7/486G01S17/89
Inventor 韩绍坤马亚运夏文泽王亮曹京亚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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