Photoelectricity mixing correlator based on position sensitive device (PSD) position detector

Abstract

The invention relates to a photoelectricity mixing correlator based on a position sensitive device (PSD) position detector. For the first time, the PSD position detector is introduced into a matched filtering correlator, correlation peak information is collected by a PSD, and target position information is extracted according to the correlation peak information of a target image and a template image after photology correlation conversion. Photoelectric conversion efficiency is greatly improved, and simultaneously organic combination of flexibility of electronics and high speed of optics is achieved. A matched filter is conducted in advance by an electronics method, the target image and the template image are input into a spatial light modulator, optics Fourier transformation is conducted by a Fourier transformation lens, and related computing results are collected by the PSD position detector. The photoelectricity mixing correlator based on the PSD position detector can be applied to high-speed image stabilizing of video, high-speed identification and tracking of a target and the like.

Description

technical field [0001] The invention belongs to the field of information optics. The PSD position detector is applied to a matched filter correlator, which realizes the organic combination of the flexibility of electronics and the high speed of optics. the field of information processing. Compared with the traditional CCD / CMOS and other planar array detectors to collect correlation peak information, the photoelectric conversion rate is significantly improved, thereby realizing the high speed of the system. Background technique [0002] The Optical Correlator was first proposed by A.Vander Lugt ("Signal detection by complex spatial filtering," IEEE Trans. Inf. Theory IT-10, 139-145 (1964)). The optical correlator uses optical methods to realize the correlation calculation between the target image and the reference image, so as to realize the recognition and tracking of the image. The optical correlator has the characteristics of high speed and parallel processing, and is su...

AI Technical Summary

Problems solved by technology

[0014] However, the traditional optical correlator usually chooses CMOS / CCD and other planar array detectors as the detector of the correlation calculation result. The low photoelectric conversion rate becomes the bottleneck restricting its further development and cannot meet the requirements of high-speed identification and tracking.

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