Compact polarization imaging camera wide in field of view

Abstract

The invention discloses a compact polarization imaging camera wide in field of view. The distance between the last lens face of an object lens and each image sensor is larger than the focal distance of the object lens. A plurality of beam splitters are arranged between the object lens and the image sensors. After a light beam is divided into a plurality of light beams, each light beam is imaged to one corresponding image sensor through one linear polarizer, wherein the number of the light beams equals that of the image sensors. Because a long rear working distance object lens is formed by a front negative lens assembly and a rear positive lens assembly, under the conditions of the small focal distance of the object lens and a large imaging field angle, the distance between the object lens and each image sensor can be effectively increased, the beam splitters, a plurality of polarization elements and the image sensors can be placed on the space, and the size of a splitting type amplitude measurement-polarization imaging system can be effectively reduced.

Description

[0001] technical field [0002] The present invention relates to an imaging camera, in particular to a wide field of view volume compact polarization imaging camera Background technique [0003] Polarization imaging or Stokes polarization imaging technology is a new image detection technology developed in recent years. Compared with the traditional light intensity image detection technology, it can obtain the polarization intensity, Parameters such as degree of polarization, polarization angle, and polarization ellipticity greatly increase the amount of information of the detected target. Based on these advantages, polarization imaging technology has important application value in the fields of medicine, industry and national defense. [0004] At present, the main polarization imaging detection methods are timing method, integrated micro-polarization element array method and amplitude-divided measurement method. The timing measurement method uses mechanical switching or li...

AI Technical Summary

Problems solved by technology

At present, polarization imaging cameras with three image sensors have appeared, but because it is difficult to further compress the space, it is difficult to add a fourth image sensor, so it does not belong to the true full Stokes polarization imaging; in addition, increasing the focal length of the imaging objective lens , can only be limited to applications with small field of view or long-distance shooting, such as telephoto, aerial photography and remote sensing

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