All-optical path polarization sensor based on beam splitter prism

Abstract

The invention relates to an all-optical path polarization sensor based on a beam splitter prism. The polarization sensor is mainly used for solving the problems that an existing polarization sensor has orthogonal error, and the optical path information use is incomplete. The all-optical path polarization sensor based on the beam splitter prism is mainly composed of an optical lens structure and a photoelectric detection structure; the optical lens structure comprises three polarizing beam splitting grooves for placing the beam splitter prism, and the three grooves are distributed in 60 degrees. By means of the beam splitter prism and optical path structure, the all-optical path information is completely used, the orthogonal mounting error is eliminated, and the sensor precision is improved. The all-optical path polarization sensor based on the beam splitter prism has advantages of high precision, small volume, high integration level and the like.

Description

technical field [0001] The invention relates to a navigation sensor, in particular to a design of an all-optical-path polarization sensor based on a beam-splitting prism. Background technique [0002] After sunlight enters the atmosphere, it is scattered by atmospheric molecules to produce different polarization states. In 1871, the famous British physicist Rayleigh proposed the Rayleigh scattering law, which revealed the light scattering characteristics, and then people obtained the full-space atmospheric polarization distribution model based on the Rayleigh scattering law. Skylight Polarization navigation, as the main or auxiliary navigation method of some birds, bees, spiders, ants and lobsters in nature, has a relatively stable distribution pattern, combined with the real-time time and geographical location of the carrier, that is The orientation information contained in the polarized light can be determined. Atmospheric polarization information acquisition is a necess...

AI Technical Summary

Problems solved by technology

The sensor includes three polarizers and photoelectric conversion modules with different orientations. The photoelectric conversion module is composed of a photodiode and a logarithmic amplifier. However, the polarization sensor uses a circular polarizer, and there is an orthogonal error in the initial installation direction. The accuracy is affected, and the photoelectric conversion module is composed of analog devices such as photodiodes and logarithmic amplifiers, and the error interference is large

Three-channel polarization navigation sensor, patent No. 20130380079.0, designed a three-channel polarization sensor, which replaced the polarizer with a polarized three-dimensional beam splitter, but did not make full use of the two-way polarized light split by the beam-splitting prism, and only used one light path to split the beam-splitting prism The collected polarized light information is insufficient and the volume is large

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