A device and method for spot center extraction based on prism segmentation

Abstract

The invention discloses a light spot center extraction device based on prism segmentation and a method thereof. The device adopts a beam splitter and ridge prisms to segment a light beam received by an optical system. The beam splitter splits the light beam into two beams of light with mutually orthogonal spaces. A horizontal detection unit and a vertical detection unit are used to detect the two beams of light respectively. The ridge prisms in the detection units divide an incident light beam into two beams of light which have opposite directions and are located at a same straight line. A focusing lens is used to converge the light and a silicon photoelectric diode is used to carry out light intensity detection. A computer carries out data processing on four paths of light intensity information detected by the horizontal detection unit and the vertical detection unit so as to acquire a center of a light spot to be detected. In the invention, an optical element is used to carry out light spot image segmentation, the method is novel, easy and practicable, and simultaneously high precision light spot center extraction can be realized.

Description

Technical field: [0001] The invention relates to high-precision optical detection, in particular to a method for extracting the center of a light spot, which can be used for extracting the center of a beacon light spot in a space laser communication capture, tracking and aiming system. Background technique: [0002] The core technology of satellite laser communication is acquisition, tracking and aiming technology, and the tracking and aiming technology at the micro-arc level is the difficulty. High-precision tracking and targeting needs to accurately obtain the center information of the tracking and targeting reference source, and use the center information of the tracking and targeting reference source to guide the precise pointing of the beam of the satellite terminal, and then realize the establishment and maintenance of the satellite laser communication link. However, it is difficult to accurately extract the beacon spot center due to the following problems: [0003] 1...

AI Technical Summary

Problems solved by technology

However, it is difficult to accurately extract the beacon spot center due to the following problems:

[0003] 1. The detector of the fine tracking subsystem of the capture, tracking and aiming system needs to meet a certain field of view and a high accuracy of extracting the center of the beacon spot. The traditional detector extracts the center of the beacon spot, and there is a detector image Element non-uniformity, low filling rate, low quantum efficiency and other problems

[0004] 2. The detector of the fine tracking subsystem of the capture, tracking and aiming system needs to meet a higher detection frame rate to achieve a higher precision interference suppression bandwidth. Traditional detectors need complex circuits to achieve a higher detection frame rate Design and Data Processing

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