Snapping type high-flux polarization imaging method and polarization imager

Abstract

The invention provides a snapping type high-flux polarization imaging method and a polarization imager. The polarization imager comprises a front optical imaging system, a microlens array and an array type polarization imaging detector. The microlens array is arranged on the imaging face of the front optical imaging system. The array type polarization imaging detector is arranged on the focal plane of the front optical imaging system. The array type polarization imaging detector is composed of a CCD detector array and a linear polarizing film array in a coupled mode. Each linear polarizing film corresponds to a CCD detector pixel. Light emitted or reflected by a target in different directions passes through the front optical imaging system and is imaged on a certain microlens. The received light in the different directions of the target is distributed to the pixels of the array type polarization imaging detector through the microlenses so that sub images can be formed and finally an image, at each polarizing angle, of the target is obtained. The polarization imager has the advantages that the images at the multiple polarizing angles of the target can be obtained through exposure conducted at a time and can be used for monitoring and tracking the rapidly-changing or moving target.

Description

technical field [0001] The invention relates to optical imaging technology, in particular to a polarization imaging method and a polarization imager for realizing frame-style photography by using a light field imaging technology based on a microlens array and an array polarization imaging detector. Background technique [0002] Polarization imaging technology is the basis for obtaining the polarization information of the target image, and it is the premise of analyzing and identifying the target by using the polarization characteristics. At present, the polarization detection and analysis technology at home and abroad is mainly based on the Stokes vector analysis method. The polarization information detection based on this method needs to obtain at least three polarization angle images of the target. Different, polarization imaging technology is mainly divided into staring type and snapshot type. The staring polarization imaging technology realizes the acquisition of multip...

AI Technical Summary

Problems solved by technology

However, this technology has the following disadvantages: the luminous flux of the pinhole array is low, which increases the exposure time, and cannot be applied to fast-changing or moving targets; the physical diffraction spot of the pinhole array is large, and the utilization rate of the detector pixel is low

However, this technology has the following disadvantages: there is image crosstalk between adjacent pixels; two microlens arrays are used, and the system complexity increases

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