Infrared sub-pixel polarized light imaging device and imaging method

Abstract

The invention discloses an infrared sub-pixel polarized light imaging device and an imaging method. On the basis of using a staggered rhombus array mode, pixel pitch can be greatly reduced by reconstructing pixels containing polarization information of different polarization angles. Due to the fact that the size of the pixel pitch determines resolving power, on the premise that the resolution ratio is not changed, the optical area is greatly reduced, the size of the sensor is reduced, the size and the cost of the lens are reduced, and the cost of the whole machine is greatly reduced.

Description

technical field [0001] The present application relates to an infrared imaging device, in particular to an infrared sub-pixel polarized light imaging device and an imaging method. Background technique [0002] In order to obtain infrared polarized light images, a layer of polarizers is usually added above the acquisition unit of traditional infrared polarized light imaging sensors. For example, N polarizers with different angles are placed on a single pixel, and each group of N pixels is used as One compute unit, which would result in a resolution down to 1 / N. [0003] Therefore, in order to improve the resolution, it is necessary to increase the number of pixels in the unit optical area, that is, to reduce the size of the pixels, but when the pixels are reduced to a certain size, due to the constraints of the diffraction limit, the adjacent pixels will be separated. The signal produces crosstalk, and the diffraction limit is that when a beam of light is focused on a single ...

AI Technical Summary

Problems solved by technology

[0002] In order to obtain infrared polarized light images, a layer of polarizers is usually added above the acquisition unit of traditional infrared polarized light imaging sensors. For example, N polarizers with different angles are placed on a single pixel, and each group of N pixels is used as one computing unit, which results in a resolution down to 1 / N

[0003] Therefore, in order to improve the resolution, it is necessary to increase the number of pixels in the unit optical area, that is, to reduce the size of the pixels, but when the pixels are reduced to a certain size, due to the constraints of the diffraction limit, the adjacent pixels will be separated. The signal produces crosstalk, and the diffraction limit is that when a beam of light is focused on a single pixel, it will rapidly defocus on the surface of the pixel due to diffraction, forming a light cone section, that is, the Airy disk, and the size of the pixel should not be smaller than Airy disk radius, therefore, it is extremely difficult to maintain resolution by increasing the number of pixels per unit optical area

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