FLC-based hyperspectral all-polarization imaging device and method

Abstract

The invention discloses an FLC-based hyperspectral all-polarization imaging device and method. The imaging device comprises a pre-posed imaging objective lens, a diaphragm, a collimator objective lens, a polarization modulation system, a Sagnac interference device, a post-posed imaging objective lens and a detector, which are arranged in sequence along the light path. The method comprises the following steps: 1) after passing through the pre-posed imaging objective lens and the collimator objective lens, incident light enters the polarization modulation system in the form of a collimated light beam; 2) the light beam passes through the polarization modulation system to obtain four interference images, and enters the Sagnac interference device; 3) the light beam is intervened by the Sagnac interference device; 4) the light beam enters the post-posed imaging objective lens and is imaged on the target surface of the detector; and 5) interference light intensity information of each object point is obtained from the target surface of the detector, and the interference light intensity information is processed to obtain spectral information and all-polarization information of each target point. The imaging device and method have the advantages of high luminous flux, high spectral resolution, high target resolution, quick modulation and obtaining the spectral information and the all-polarization information simultaneously and the like.

Description

technical field [0001] The invention relates to the field of optical target detection, in particular to an FLC-based hyperspectral full-polarization imaging device and method. Background technique [0002] Imaging spectroscopy technology and polarization imaging technology are the organic combination of space imaging technology, spectral analysis and polarization measurement technology, and are new optical remote sensing detection technologies developed in recent years. [0003] Imaging spectroscopy technology obtains two-dimensional spatial information and one-dimensional spectral information of the target. Any object on the surface, ocean and sky will show different spectral characteristics in the process of reflecting, transmitting and radiating light waves. Analysis of these characteristic spectra can identify the type, material and material composition of the target. Interferometric imaging spectroscopy mainly includes three types: time modulation, space modulation and...

AI Technical Summary

Problems solved by technology

The system requires dynamic modulation and cannot achieve fast detection of polarization information

The hyperspectral fully polarized Fourier imaging spectrometer proposed by Meng Xin et al. realizes polarization modulation by using a wave plate and a linear polarizer. Since the system needs to rotate the wave plate and linear polarizer, four stokes vectors cannot be obtained simultaneously in a single measurement. Polarization information of

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