A high-throughput and high-stability coherent dispersion spectroscopy imaging device

Abstract

The invention provides a high-flux high-stable coherent dispersion spectrum imaging apparatus. The apparatus comprises a common optical path interference spectral optical path, a dispersion spectral optical path and a photoelectric detector which are successively arranged. The common optical path interference spectral optical path adopts a common optical path Sagnac interferometer with an asymmetric structure so that a light beam which is returned by a beam splitting surface in the common optical path Sagnac interferometer is not superposed with an incident light beam and is parallel to and separated from the incident light beam in a space. On an optical path before secondary light splitting, a light path adjusting structure, corresponding to the light beams which are parallel to each other and are separated from each other in the space, is arranged so that two paths of first-grade light beams finally generate a light path difference so as to interfere light beam emission. One path of interference light beam is converged to a slit and the slit becomes an incident image plane position of the dispersion spectral optical path. Another path of the interference light beam, which is the light beam finally returned by the beam splitting surface in the common optical path Sagnac interferometer, is converged and then enters into the dispersion spectral optical path.

Description

technical field [0001] The invention belongs to the technical field of spectral imaging, and relates to a method and device for coherent dispersion spectral imaging. Background technique [0002] Spectral imaging technology, sometimes also called imaging spectroscopy technology, combines spectral technology and imaging technology, and covers a variety of disciplines such as spectroscopy, optics, computer technology, electronic technology and precision machinery. It can simultaneously obtain two-dimensional spatial information and One-dimensional spectral information. Spectral imaging technology is widely used in military affairs, medicine, industry, agriculture, resources and environment, atmospheric detection, astronomy, etc., and its development is in the ascendant. [0003] Dispersion type and interference type are two main types of light separation in spectral imaging technology. Generally, these two spectroscopic methods are used separately. In rare cases, such as us...

AI Technical Summary

Problems solved by technology

However, in the traditional common optical path (symmetrical structure) spectroscopic technology, no matter in vacuum, air or other media, the route of the target light traveling in it is coincident and the same, and no optical path difference can be generated.

The traditional coherent dispersion method has not yet been applied to the common optical path technology

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