Optical field polarization state measurement method and device, computer device and storage medium

A polarization state and parameter technology, which is applied in the optical field, can solve the problem that the measurement accuracy of the polarization state of the light field is not high enough, and achieve the effect of improving the accuracy.

Active Publication Date: 2018-12-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Therefore, it is also impossible to calibrate the processing error of the phase modulation device in the detection system and the error of the detection system through experiments, resulting in insufficient measurement accuracy of the polarization state of the light field

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  • Optical field polarization state measurement method and device, computer device and storage medium
  • Optical field polarization state measurement method and device, computer device and storage medium
  • Optical field polarization state measurement method and device, computer device and storage medium

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0025] The light field polarization state measurement method provided by this application can be applied to such as figure 1 shown in the application environment. refer to figure 1 , the application environment includes a light source 102 , a spatial filter 104 , a collimator lens 106 , a polarization generator 108 , a phase modulator to be measured 110 , a polarization analyzer 112 , a detector 114 and a terminal 116 . Wherein, the light source 102 may be a He-Ne laser. Spatial filter 104 may be composed of a microscope objective lens and a pinhole. Polarization gener...

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Abstract

The present invention relates to an optical field polarization state measurement method and device, a computer device and a storage medium. The method comprises the steps of: obtaining incident polarization state data of calibration incident light and emergent polarization state data of calibration emergent light; according to the incident polarization state data and the emergent polarization state data, calculating and obtaining a target Mueller matrix of a phase modulator to be measured; inputting the target Mueller matrix into a pre-constructed polarization state probability density distribution model to output and obtain a target polarization state probability density distribution function corresponding to the target Mueller matrix, wherein horizontal coordinates and vertical coordinates of the target polarization state probability density distribution function are respective Stokes parameters and corresponding probability values, and the target polarization state probability density distribution function corresponds to an optical field to be measured; obtaining a target Stokes parameters corresponding to the maximum probability value in the target polarization state probability density distribution function; and expressing the polarization state of the optical field to be measured through the target Stokes parameters. The method can improve the optical field polarization state measurement precision in low light and can improve the optical field polarization state measurement speed in non-low light.

Description

technical field [0001] The present application relates to the field of optical technology, in particular to a method, device, computer equipment and storage medium for measuring the polarization state of an optical field. Background technique [0002] With the development of light field polarization measurement technology, a theoretical technology of light field polarization state probability density detection has emerged. This technology uses spatially distributed phase modulation devices to generate polarization-dependent point spread function (PSF) images, and processes PSF images under the framework of Bayesian statistical theory to calculate the polarization state probability density distribution function of the light field to be measured. [0003] However, in the traditional way, although the theoretical relationship between the probability density detection of the light field polarization state and the point spread function of the pinhole imaging has been established,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/0292
Inventor 李艳秋潘文浩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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