Polarization imaging device based on planar anisotropic chiral microstructure

Abstract

The invention discloses a polarization imaging device based on a planar anisotropic chiral microstructure. The polarization imaging device is composed of a microstructure layer, a transparent isolation layer, a photosensitive element and a circuit. The plane anisotropic microstructure layer is composed of a superpixel unit array with a chiral structure; each super-pixel unit comprises four micro-structure arrays, namely a 0-degree tending chiral structure, a 45-degree tending chiral structure, a 90-degree tending chiral structure and a 0-degree tending enantiomer structure; the super-pixel unit array composed of the four microstructures is adopted, the microstructures of the fewest types are adopted in the prior art, the imaging resolution can be improved, and the machining cost and complexity can be reduced; the polarization imaging device has the advantages that the device is simple in structure, easy to process and manufacture, small in size and high in integration level, and full Stokes parameter measurement from an ultraviolet band to an infrared band can be realized by accurately controlling the size of the microstructure unit. The polarization imaging device has wide application prospect in the fields of atmospheric remote sensing, biomedical diagnosis, military navigation, marine environment detection and the like.

Description

technical field [0001] The invention relates to the technical field of optical devices, in particular to a polarization imaging device based on planar anisotropic chiral microstructures. Background technique [0002] Polarization is one of the basic properties of light. When an object is subjected to reflection, scattering, and transmission, different objects reflect different polarization information, and the polarization information of the same object in different states will also be different. Polarization detection can provide more target information than traditional intensity detection and spectral detection. The polarization imaging technology uses a polarization detection device to measure each polarization component of the light, and then obtain part or all of the polarization information of the measured light, that is, the Stokes parameter. Through the analysis and calculation of these polarization information, the amount of information that can be obtained is exte...

AI Technical Summary

Problems solved by technology

[0003] Traditional polarization imaging systems based on polarizers and glass slides cannot meet the current application requirements of full polarization, fast measurement, miniaturization and high stability

Micro-nano optics provides a new technical solution for the Stokes imaging system, but the reported solutions strictly depend on the precise size of the micro-nano structure

The precise processing requirements of subwavelength nanostructures (especially those working in the visible and ultraviolet bands) approach or even exceed the limits of existing processing technologies, which limits the development and application of new Stokes imaging systems

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