Image, spectrum and polarization state integration acquisition device and detection method

Abstract

The invention discloses an image, spectrum and polarization state integration acquisition device and detection method, along an incident light propagation direction, a front telescoping system, an achromatic lambda / 4 wave plate array, a polarizer, a Savart polariscope, an analyzer, an imaging lens array and an area array CCD are arranged in sequence in a main optical axis direction, four kinds of modulation is performed on spectrum and polarization information through the achromatic wave plate array, then four intensity spectrum interference images after modulation are obtained through a polarized interferometer formed by the polarizer, Savart polariscope and analyzer, and a target image, and spectrum and polarization state information are precisely restored through Fourier transformation. The defects that the restored spectrum resolution is seriously reduced in measurement of a Stokes vector spectrum by a channel spectrum technology and error distortion exists in the restored spectrum are overcome. A polarization spectrum information restoration result has immunization to Gaussian noise and Poisson noise existing in an instrument, the signal-to-noise ratio of acquired interferogram data is improved, and the problems of low signal-to-noise ratio and poor timeliness in spectrum element time-sharing detection by a conventional measurement method are solved.

Description

Technical field [0001] The invention belongs to the field of imaging technology, and relates to an acquisition device and a detection method, in particular to an achromatic An integrated acquisition device and detection method for image, spectrum and polarization state of wave plate array. Background technique [0002] Imaging technology can describe the morphological characteristics of the target, spectroscopy technology describes the interaction of substances with light of different wavelengths, and polarization technology can describe the scattering and reflection characteristics of substances. In the process of target detection and cognition, the image, spectrum and polarization state of the same target can provide complementary and multiple information. Obtaining this information can help analyze the rich physical and chemical characteristics of the target, so as to achieve a more comprehensive, accurate and scientific target. Cognition, imaging spectral polarization techno...

AI Technical Summary

Problems solved by technology

However, the interference image obtained by using CSP technology needs to perform channel filtering of the optical path difference dimension when restoring the polarization spectrum information. This process reduces the optical path difference corresponding to each channel to 1 / 7~1 / 3. According to the principle of Fourier transform spectroscopy, the resolution of the restored spectrum will be reduced to 1 / 7~1 / 3 of the spectral resolution of the spectrometer, which seriously affects the resolution of the restored spectrum; and, when detecting narrow-band spectra or obvious characteristic peaks In the wide-band spectrum, there is a serious crosstalk phenomenon among the obtained channelized interferograms, which cannot be removed by filtering algorithms, resulting in distortion or even errors in the restored polarization spectrum, which has become a major obstacle restricting the development and application of this technology

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