Micro-polarization array based interference imaging full-polarization spectrum detection device and method

Abstract

The invention discloses a micro-polarization array based interference imaging full-polarization spectrum detection device and method. The device comprises a front imaging objective, a collimator objective, a Sagnac lateral shearing beam splitter, an imaging objective, a micro-polarization modulation array, a detector and a signal processing system which are arranged sequentially in the direction of an optical path. The method comprises the following steps: step one, incident light is imaged by the front imaging objective, and then a light beam is collimated by the collimator objective; step two, the collimated light beam is laterally sheared by the Sagnac lateral shearing beam splitter; step three, the sheared light beam reaches the micro-polarization modulation array through the imaging objective, one object point corresponds to four polarization pixels, and four groups of interference images in a scene are acquired from a target surface of the detector through push scanning; and step four, the signal processing system acquires the two-dimensional light intensity information, spectral information and full-polarization parameters of all spectrum bands of the scene after spectrum reconstruction and polarization information reconstitution. The method has the advantages of high spectral resolution, high target resolution and synchronous acquisition of full-polarization information.

Description

technical field [0001] The invention relates to the field of optical target detection, in particular to a micro-polarization array-based interference imaging full polarization spectrum detection device and method. Background technique [0002] The imaging spectrometer can obtain the spectral information of each point in the two-dimensional space of the target to form a three-dimensional data cube of the target scene. Among them, the interferometric imaging spectroscopy technology mainly includes three types of techniques: time modulation, space modulation and space-time joint modulation. Space-time joint modulation technology is a very active spectral detection technology in the field of spectral imaging. It introduces the interference information of the detection target by adding a transverse shearing beam splitter in the infinite-distance imaging system, and uses Fourier transform inversion processing to obtain the two-dimensional spatial light intensity information and s...

AI Technical Summary

Problems solved by technology

Introducing polarization state information into the interference imaging spectrometer, this method can simultaneously introduce full Stokes polarization information, but when the detection spectral band is a narrow-band spectrum, aliasing will occur between adjacent polarization interferograms, which will affect the restoration accuracy

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