Metalens array and method for non-uniformity correction of infrared detectors

Abstract

The invention discloses a meta-lens array and a method for correcting the non-uniformity of an infrared detector. The metalens array is etched on the lower surface of the substrate, wherein each detector in the infrared detector array is the same size as each metalens in the metalens array. The method comprises steps: (1) performing radiation measurement on the detector array; (2) scanning the digital-analog image; (3) obtaining the focal length of the metalens corresponding to each sampling point; (4) designing the metalens; (5) ) to generate a metalens array. The invention can reduce the volume of the infrared imaging system, has the advantages of light weight and integration, can timely and effectively correct the non-uniformity in the process of infrared imaging, improve the quality of infrared imaging, and has the characteristics of wide application range and strong real-time performance .

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a metalens array and a method for correcting the non-uniformity of an infrared detector in the technical field of infrared imaging. In the present invention, by adding a set of metalens arrays in front of the infrared detector array at the focal plane, according to the response distribution of the infrared detector, the infrared radiation information is efficiently modulated onto the photosensitive element of the infrared detector, and can be used in the infrared imaging process. , effectively correcting the non-uniformity of the photosensitive element on the infrared detector. Background technique [0002] Infrared imaging is the core of infrared technology, and it is widely used in military equipment, astronomical observation, medical diagnosis and daily life. However, the material and manufacturing process of the infrared detector often lead to non-uniform resp...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a metalens array and a method for correcting the non-uniformity of infrared detectors in view of the deficiencies of the above-mentioned prior art, so as to solve the problem of large number of devices, large volume, and high difficulty in assembly in the prior art. It is difficult to meet the problem of integration of infrared imaging system. At the same time, it solves the problem of complex and low real-time performance of existing correction methods. The invention can correct the non-uniformity of the photosensitive element on the infrared detector during the infrared imaging process.

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