Method for realizing super-large vieing-field static polarization Fourier transform imaging spectrum

A technology of Fourier transform and imaging spectrum, which is applied in the field of optical imaging, can solve the problems of interference fringe bending distortion and small field angle (generally only a few degrees), and achieve the effect of large field of view, wide spectral detection range and high detection sensitivity

Inactive Publication Date: 2011-02-02
XI AN JIAOTONG UNIV
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Problems solved by technology

In the above process, due to the limitation of the beam splitter in the second step, the interference fringe will produce bending distortion when the incident angle is large, so the imaging spectrometer based on this imaging spectroscopy method has a small field of view (generally only a few degrees) shortcoming

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  • Method for realizing super-large vieing-field static polarization Fourier transform imaging spectrum
  • Method for realizing super-large vieing-field static polarization Fourier transform imaging spectrum
  • Method for realizing super-large vieing-field static polarization Fourier transform imaging spectrum

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[0019] The principle of the method of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Reference figure 1 In the present invention, the acquisition and display of ultra-large field of view imaging spectral information is achieved through the four steps of collecting light, field of view compensation type light splitting interference, forming interference imaging, demodulation and processing in sequence.

[0021] Reference figure 2 , The imaging spectrometer that realizes the method of the present invention includes a front telephoto system 1, a polarizer 2, a field-of-view compensation type polarization beam splitter 3, an analyzer 4, an imaging lens group 5, and a detector which are arranged in a coaxial order in sequence 6. The detector 6 is connected with a signal acquisition and processing system 7.

[0022] The following takes a dual polarizer group field of view compensation type polarizing beam splitter ultra-large ...

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Abstract

The invention relates to a super-large viewing-field static polarization Fourier transform imaging method which comprises the following steps of: collecting, collimating and eliminating stray light for radiating light emitted by a target source through a front telescope system, and converting the radiating light into linearly polarized light through a polarizer; separating the linearly polarized light into two coherent and parallel partial light beams through a viewing-filed compensating polarization beam splitter; changing the vibration directions of the two partial light beams to be the same through an analyzer; and finally, converging the two light beams onto a detector for imaging and interference through an imaging mirror group to form an interference fringe modulated image containing spectrum information; and acquiring and processing received signals through a signal acquiring and processing system to acquire the image and the high spectral information of a target in a large vision angle.

Description

Technical field [0001] The invention relates to an optical imaging method, in particular to a method for realizing super-large field of view static polarization Fourier transform imaging spectrum. Background technique [0002] Light is the carrier of information. The optical imaging method uses an imager to obtain the shape and shadow image of the target to obtain the spatial information of the target, while the spectrometer obtains the spectral information of the target, thereby obtaining the structure and chemical composition of the substance. In the 1980s, the American Aerodynamics Laboratory (JPL) proposed the concept of imaging spectrometer, which has the dual function of obtaining target image and spectrogram at the same time. It is generally regarded as a revolutionary leap in the development history of modern optical imaging technology. After more than 20 years, it has developed successively. There are many types of imaging spectrometers such as dispersion type, Fourier t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/02G01J3/28G01J3/26
Inventor 朱京平李杰
Owner XI AN JIAOTONG UNIV
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