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A swinging polarizer type polarization imaging measurement device and method

A polarization imaging and measurement device technology, which is applied in the direction of measurement devices, polarization spectra, optical device exploration, etc., can solve the problems of insufficient polarization detection, and achieve the effects of increased sampling speed, simple operation, and stable work

Active Publication Date: 2021-03-02
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this rotating polarizer-type time-sharing polarization imaging detection method is restricted by factors such as motor rotation speed, high-precision positioning, and polarization imaging algorithms. The maximum output polarization frame rate is only 8 polarization frames per second. Such a polarization frame rate Polarization detection for moving target scenes is not enough

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  • A swinging polarizer type polarization imaging measurement device and method
  • A swinging polarizer type polarization imaging measurement device and method
  • A swinging polarizer type polarization imaging measurement device and method

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Embodiment 1

[0034] like figure 1 As shown, a swinging polarizer-type polarization imaging measurement device provided by an embodiment of the present invention includes a lens module 1, a polarization module 2, a detection module 3 and a control module ( figure 1 not shown). Wherein, the lens module 1 includes an optical lens for imaging a target scene, and the detection module 3 includes a detector for receiving light emitted by the optical lens. The central axis of the detector coincides with the central axis of the optical lens to receive light. Preferably, the lens module 1 also includes a lens holder for setting the optical lens, and the detection module 3 also includes a detector holder for setting the detector, and an adjustable bracket is preferably arranged between the lens holder and the detector holder. The slide rail is used to locate the relative position of the detector and the optical lens.

[0035] like figure 1 and figure 2 As shown, the polarization module 2 includes ...

Embodiment 2

[0049] For the above-mentioned swinging polarizer-type polarization imaging measurement device, the present invention also provides a swinging polarizer-type polarization imaging measurement method, using the swinging polarizer-type polarization imaging measurement device as described in any one of the above to perform polarization imaging measurement, specifically Including the following steps:

[0050] S1. Arrange and calibrate a swinging polarizer-type polarization imaging measurement device on one side of the target scene.

[0051] Among them, the calibration includes adjusting the relative positions of the lens module 1, the polarization module 2, and the detection module 3, so that the central axis of the detector coincides with the central axis of the optical lens, and any polarizer 23 can be turned to make its own central axis coincide with the detection axis. The measuring position where the central axes of the detector and the optical lens coincide, and when the cent...

Embodiment 3

[0068] like Figure 1 to Figure 4 As shown, the third embodiment is basically the same as the first embodiment, and the similarities will not be repeated. The difference lies in:

[0069] The swinging polarizer polarization imaging measurement device uses three quartz wire grid polarizers with the same specifications, the effective diameter is 25.4mm, the effective wavelength range is from visible to short-wave infrared, that is, 350-2500nm, the transmittance is greater than 80%, and the extinction The ratio is 1000:1. After the quartz wire grid polarizer is clamped and installed on the balance wheel through the pressure ring, the difference between the effective light aperture and the effective diameter of the polarizer is no more than 4mm. The minimum value of the cycle number n of the reciprocating swing is 25. A CCD detector is used for radiation intensity image acquisition.

[0070] During operation, the polarization module and the detection module work synchronously. A...

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Abstract

The present invention relates to the technical field of polarization imaging, in particular to a swinging polarizer type polarization imaging measurement device and method, the device includes a lens module, a polarization module, a detection module and a control module; wheel; the balance wheel is provided with at least three polarizers with different polarization directions, and each polarizer is arranged adjacent to the circumference of the rotation axis, the balance wheel is located between the detection module and the lens module, and each polarizer can follow the rotation axis Go to the measurement position; the control module is electrically connected with the polarization module and the detection module, and is used to generate swing control commands and send them to the polarization module to control the rotation mode of the rotating shaft, realize the reciprocating swing of the balance wheel, and generate acquisition control commands and send them to The detection module realizes the measurement of the radiation intensity images of the target scene under different polarization directions. The invention collects polarization images quickly and outputs polarization frames at a high rate, and is suitable for high-precision and rapid measurement of polarization information of moving target scenes.

Description

technical field [0001] The invention relates to the technical field of polarization imaging, in particular to a swinging polarizer type polarization imaging measurement device and method. Background technique [0002] Polarization is one of the basic properties of light. When the surface of any object on the earth interacts with sunlight, it will produce polarization characteristics that are closely related to its own properties. The polarization characteristic of matter refers to the change of the polarization state of light when it is reflected or emitted, which can usually be expressed by Jones vector method, Stokes vector method, and Poincar sphere method. The Stokes vector was first proposed by Stokes in the process of studying polarized light in 1852. A column vector containing four parameters is used to describe the intensity and polarization information of light. The four parameters are the average value of light intensity time, which can be Measured with different ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/447G01V8/10G01N21/21G01B11/24
CPCG01B11/24G01J3/447G01N21/21G01V8/10
Inventor 杨敏徐文斌孙振远李军伟郑崇修鹏孙宪中刘菁
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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