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A high-resolution real-time polarization spectrum analysis device and method

A polarized spectrum, high-resolution technology, applied in the field of optical detection and spectral analysis, can solve the problems of difficult to obtain, high spectral resolution, etc., and achieve the effect of high resolution and good anti-vibration ability

Active Publication Date: 2021-10-08
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this device can realize the integrated detection of target image, spectrum and full polarization information without movement and without electronically controlled modulation components, it is based on double-beam interference to achieve spectral analysis, and the spectral resolution is several nanometers, so it is difficult to obtain high spectral resolution

Method used

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  • A high-resolution real-time polarization spectrum analysis device and method
  • A high-resolution real-time polarization spectrum analysis device and method

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Embodiment 1

[0032] Embodiment 1, a high-resolution real-time polarization spectrum analysis device.

[0033] like figure 1 As shown, the high-resolution real-time polarization spectrum analysis device provided by the present invention includes a combined slit array 1-1, a collimating mirror 1-2, a grating 1-3, a focusing mirror 1-4 and a photodetector 1-5.

[0034] Combining the slit array 1-1 as the diaphragm of the entire polarization spectrum analysis device, the light is spatially filtered, so that the beam width is incident on the collimating mirror 1-2 according to the required width (the collimating mirror 1-2 is the standard in the present invention) Straight reflector), and the combined slit array 1-1 contains a polarizer, which has the effect of polarization filtering on the incident light wave; the collimator 1-2 collimates the light and then enters the grating 1-3, and the grating 1-3 The light is split, and the split beam is then imaged on the photodetector 1-5 through the f...

Embodiment 2

[0051] Embodiment 2, a high-resolution real-time polarization spectrum analysis method.

[0052] Using the polarization spectrum analysis device in embodiment 1 to carry out polarization spectrum analysis to a beam of light, the specific steps are as follows:

[0053] a. Set up the high-resolution real-time polarization spectrum analysis device described in Example 1.

[0054] b. Let the incident light enter the combined slit array, the light filtered by the combined slit array enters the collimating mirror, the collimating mirror collimates the light and then enters the grating, the grating splits the light, and the split beam is then focused The mirror is imaged on the photodetector, and the light of different wavelengths is sequentially separated on the photodetector along the direction of the spectral dimension.

[0055] c. Decode the imaging spectrum, restore the spectral information corresponding to each column of slits from the superimposed spectral information; then o...

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Abstract

The invention provides a high-resolution real-time polarization spectrum analysis device and method. The high-resolution real-time polarization spectrum analysis device includes a combined slit array, a collimating mirror, a grating, a focusing mirror and a photodetector. The arrayed polarizer in the combined slit array is composed of four polarizers with different polarization states, which form four polarization channels, and each column of the array slit has a different coding form, so that the back-end The imaging spectrum of the slits encodes the spatial position information of each column of slits; decoding is performed later, and the spectral information corresponding to each column of slits is restored from the superimposed spectral information. Each polarization channel corresponds to the spectrum of one or more columns of slits. Through the correspondence between the polarization channel and each column of slits, the high-resolution spectral distribution and polarization information (polarization state, degree of polarization) of the measured light can be obtained. Realize the real-time measurement and analysis of the spectrum and polarization information of the light field.

Description

technical field [0001] The invention relates to the technical fields of spectrum analysis and optical detection, in particular to a high-resolution real-time polarization spectrum analysis device and method. Background technique [0002] Spectral measurement technology is used to detect the target spectrum and obtain chemical properties such as the material composition of the target; polarization measurement technology is used to detect the polarization information of the target and obtain physical properties such as the refractive index, dielectric constant and surface roughness of the target. Any target on the earth's surface and in the atmosphere, in the process of reflection, scattering, transmission and emission of electromagnetic radiation, will produce characteristic polarization information, absorption or reflection spectrum information determined by their own properties and basic laws of optics. Different objects or different states of the same object (such as rough...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/21
Inventor 郝鹏宁丽珍
Owner HEBEI UNIVERSITY
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