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A Method for Measuring the Polarization Transmittance of a Sub-Focal Plane Infrared Polarization Imaging Camera

A technology of infrared polarization and testing method, which is applied in the testing of machine/structural components, optical instrument testing, testing optical performance, etc. Solve the difficulty of accurate testing and realize the effect of testing

Active Publication Date: 2022-03-29
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide and disclose a method for testing polarization transmittance of a sub-focus plane infrared polarization imaging camera in view of the above-mentioned deficiencies in the prior art, which solves the difficulty in the prior art for the integration of the sub-focus plane Problems of Accurately Testing the Polarization Transmittance of Infrared Polarization Imaging Cameras

Method used

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  • A Method for Measuring the Polarization Transmittance of a Sub-Focal Plane Infrared Polarization Imaging Camera
  • A Method for Measuring the Polarization Transmittance of a Sub-Focal Plane Infrared Polarization Imaging Camera
  • A Method for Measuring the Polarization Transmittance of a Sub-Focal Plane Infrared Polarization Imaging Camera

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specific Embodiment approach

[0024] The invention discloses a method for testing the polarization transmittance of a sub-focus plane infrared polarization imaging camera, mainly by adding a non-polarization all-pass unit to each super pixel of the micro-nano grating polarization array, so as to realize the line detection of the incident and exit grating units. Simultaneous acquisition of polarized light energy, so as to realize the test of the polarization transmittance of the infrared polarization camera.

[0025] Firstly, the definition of polarized transmittance is clarified. Generally, the transmittance of TM polarized light whose electric vector is perpendicular to the direction of the wire grid is called the main transmittance. It is assumed that the radiation of the incident linearly polarized light passing through the polarization array unit and consistent with the transmission direction of the polarization unit Strength is I TMin , the radiation intensity of the outgoing polarized light is I TMo...

Embodiment

[0041] to measure figure 1 The polarization transmittance of 0° polarization unit 6 in the middle is an example, and the transmittance test method proposed in the present invention is described in detail, and it is specifically carried out according to the following steps:

[0042]1) if image 3 As shown in , adjust the positions of the surface source blackbody 7, the infrared polarizer 8 and the focal plane infrared polarization imaging camera 9 so that the optical axes of the three are consistent, and adjust the distance between the three so that the surface source radiation of the surface source blackbody 7 passes through The infrared polarizer 8 is filled with the entire field of view of the camera.

[0043] 2) Rotate the infrared polarizer 8 so that its transmission direction is consistent with the transmission direction of the polarization unit to be measured.

[0044] 3) Adjust the temperature of the surface source black body 7 to a low temperature state, continuously...

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Abstract

The invention discloses a method for testing the polarization transmittance of a sub-focus plane infrared polarization imaging camera, which solves the problem in the prior art that it is difficult to accurately test the polarization transmittance of an integrated sub-focus plane infrared polarization imaging camera. The present invention adopts the polarization transmittance test system of the sub-focus plane infrared polarization imaging camera for testing, and the polarization transmittance test system of the sub-focus plane infrared polarization imaging camera includes a micro-nano grating polarization array; the micro-nano grating polarization array includes multiple A closely connected 2 × 2 super pixel unit, the 2 × 2 super pixel unit comprises a non-polarized all-pass unit; the test method comprises the steps of: (1) adjusting the area source black body, infrared polarizer and focal plane The position of the infrared polarization imaging camera; (2) Rotate the infrared polarizer so that its transmission direction is consistent with the transmission direction of the polarization unit to be measured; calculate the polarization transmittance of the polarization unit to be measured by using the high and low temperature difference method.

Description

technical field [0001] The invention relates to a polarization transmittance test method, which is specifically used for the polarization transmittance test of a focal plane infrared polarization imaging camera. Background technique [0002] With the maturity of micro-nano processing technology, the focal plane infrared polarization imaging technology based on micro-nano grating array has attracted widespread attention. The key lies in the high-precision bonding and packaging of the grating array and the infrared focal plane. However, there is no standard and effective test method for the polarization performance test of the integrated infrared polarization imaging camera, mainly including the polarization transmittance and extinction ratio. The difficulty lies in the fact that the polarized light energy of the incident and outgoing rays needs to be known during the polarization transmittance test process. However, the current split-focus plane infrared polarization imaging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 赵永强李宁潘泉
Owner NORTHWESTERN POLYTECHNICAL UNIV