Tracking and aiming system and adjusting method

A first-line, tracking detector technology, applied in the field of laser communication, can solve the problems of tracking system misjudgment, decreased tracking accuracy, signal loss, etc., to suppress the impact of positioning accuracy, high tracking accuracy, and eliminate invalid light spot effect

Active Publication Date: 2019-12-17
PURPLE MOUNTAIN LAB
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Problems solved by technology

[0004] The purpose of the present invention is to establish a visible light tracking and aiming system and adjustment method for free space optical communication systems, to solve the nearly 5% energy left on the CCD and PSD due to the influence of coating and stray light on the non-polarization beam splitting prism. The possibility of misjudgment by the tracking system, decreased accuracy of tracking and aiming, or loss of signal due to bright spots

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  • Tracking and aiming system and adjusting method

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Embodiment Construction

[0024] Such as figure 1 As shown, the tracking system of the present invention includes a first reflector 1, a telescope 2, a second reflector 3, a third reflector 4, a first quarter-wave plate 5, a polarization beam splitter prism 6, a first linear polarization Device 7, first optical filter 8, collimator 9, laser 10, four-quadrant detector 11, focusing lens 12, second optical filter 13, second linear polarizer 14, non-polarizing beam splitter prism 15, third linear polarizer 16, a third filter 17, a fixed-focus lens 18 and a capture tracking detector 19.

[0025] The laser 10 as the laser light source is the HeNe laser of model HNL5632.8-10, and the laser 10 emits the laser light of 633nm, after being collimated by the collimator 9, the monochromatic light is sent through the first optical filter 8, and is polarized by the first line After being modulated by the device 7, the laser beam becomes S-polarized linearly polarized light, and then passes through the polarizing bea...

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Abstract

The invention discloses a tracking and aiming system and an adjusting method, and belongs to the technical field of laser communication. The tracking and aiming system comprises a coarse aiming device, a fine aiming device, a third reflector, a 1/4 wave plate, a polarization splitting prism, an S linear polarization light source, a collimator, a first optical filter, a focusing lens, a second optical filter, a second linear polarizer, a non-polarization splitting prism, a third linear polarizer, a third optical filter and a prime lens. The coarse aiming device comprises a first reflector anda capturing and tracking detector, the capturing and tracking detector is in communication connection with the first reflector, the fine aiming device comprises a second reflector and a four-quadrantdetector, and the four-quadrant detector is in communication connection with the second reflector. Compared with the prior art, the tracking and aiming system has the advantages that the coarse aimingdevice and the fine aiming device are combined, high tracking and aiming precision can be achieved,the influence of stray signals on CCD image processing and PSD positioning precision can be effectively restrained, and the possibility of position misjudgment and tracking and aiming signal loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of laser communication, and relates to a tracking and aiming system and an adjustment method. Background technique [0002] The free space optical communication system uses wireless lasers to "connect" two long-distance or short-distance communication terminals to form a communication data transmission link, which has the advantages of large communication capacity, long transmission distance, and good confidentiality. Long-distance system applications include optical communication between two satellites thousands of kilometers away, and short-distance wireless communication systems such as "FSO for last mile optical transmission". This kind of wireless laser communication technology has a narrow beam width and a long transmission distance for signal transmission. It is difficult to establish and maintain a laser link in a space environment. Therefore, it is necessary to establish a set of high-reliability ca...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B23/04G02B23/10G02B27/28
CPCG02B23/04G02B23/105G02B27/285
Inventor 冯成义张在琛陈声健张可涵王海卜
Owner PURPLE MOUNTAIN LAB
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