Polarization filter and area array detector

By adopting a symmetrically arranged rectangular array polarization filter array on the plane array detector, the problem of difficulty in alignment between the plane array detector and the polarization filter and polarization filter is solved, and the overall polarization performance and polarization detection capability of the cell level are improved.

CN119717102AActive Publication Date: 2025-03-28HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202411779140.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-28
Estimated Expiration
2044-12-05

AI Technical Summary

Technical Problem

It is difficult to align between the plane array detector and the polarization filter, and the polarization effect of the sub-wavelength metal wire gate edge is poor, resulting in a degradation of the overall polarization performance.

Method used

A polarization filter array is arranged in a rectangular array, including four subarrays arranged in a 2×2 rectangular array. Each subarray contains 4 polarization filter micro-units with different bias detection methods, which reduce the alignment requirements and reduce the negative effects of the wire gate edge through symmetric arrangement.

Benefits of technology

It reduces alignment difficulties, reduces negative effects on the wire gate edge, improves the integrated overall detector polarization performance, and realizes the polarization detection capability of the cell level.

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Abstract

The invention provides a polarization filter and an area array detector, and the polarization filter comprises at least one polarization filter array which is arranged in a rectangular array, and comprises four sub-arrays which are arranged in a 2 * 2 rectangular array, namely a first sub-array, a second sub-array, a third sub-array and a fourth sub-array, each sub-array comprises four polarization filter micro-units which are arranged in a 2 * 2 rectangular array and have different polarization detection modes, the first sub-array and the second sub-array are symmetrical along a first axis, the second sub-array and the third sub-array are symmetrical along a second axis, and the fourth sub-array and the fourth sub-array are symmetrical along a third axis. The third sub-array and the fourth sub-array are symmetrical along a first axis, and the first axis is perpendicular to the second axis. According to the polarization optical filter provided by the invention, by changing the arrangement mode of the polarization optical filter, the alignment difficulty can be reduced, and the negative effect of the wire grating edge can be reduced, so that the polarization performance of the integrated area array detector can be improved.
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