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A highly stable and large optical path difference common optical path interference spectroscopic device and its application system

A spectroscopic device and a common optical path technology, applied in the field of spectral imaging, can solve the problems such as the large optical path difference that has not yet been seen, and achieve the effect of stable interference fringes and high stability

Active Publication Date: 2019-01-22
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, in traditional common optical path situations where optical path difference needs to be generated, the typical situation is to use a Sagnac interferometer based on a two-reflector type, and there is no solution for using a three-reflector Sagnac interferometer to generate a large optical path difference.

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  • A highly stable and large optical path difference common optical path interference spectroscopic device and its application system
  • A highly stable and large optical path difference common optical path interference spectroscopic device and its application system
  • A highly stable and large optical path difference common optical path interference spectroscopic device and its application system

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Embodiment Construction

[0035] see figure 1 , the highly stable and large optical path difference common optical path interference spectroscopic device adopts a Sagnac spectroscopic interferometer with asymmetric structure. The Sagnac spectroscopic interferometer with asymmetric structure can adopt a solid or split structure. A beam splitter and two reflective surfaces, or a transflective beam splitter and three reflective surfaces. By adjusting the spatial position of the reflective surface in the Sagnac interferometer, it is ensured that the beam returned by the beam splitter (returning to the incident direction of the light source) and the incident beam no longer coincide, but are separated in parallel in space, so that it is convenient for the beam to change the medium or path to change the optical path length.

[0036]The target light enters the common optical path Sagnac interferometer with asymmetric structure as parallel or converging light; the target light is divided into one transmitted b...

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Abstract

The invention provides a high-stability large-optical-path-difference co-optical-path interference light-splitting device and an application system thereof. A co-optical-path Sagnac interferometer which is utilized in the high-stability large-optical-path-difference co-optical-path interference light-splitting device has an asymmetric structure. Namely spatial position of a reflecting surface in the co-optical-path Sagnac interferometer is set so that a light beam which returns from a beam splitting surface in the co-optical-path Sagnac interferometer is not superposed with an incident light beam and is spatially separated parallelly. The beam splitting surface performs first light splitting for obtaining a first-grade light beam and performs second light splitting for obtaining a second-grade light beam. An optical path adjusting structure which corresponds with the spatially parallelly separated light beams is arranged in the optical path before second light splitting so that the optical path difference between two first-grade light beams is finally generated, thereby realizing interference to the emergent beams. Based on the high-stability large-optical-path-difference co-optical-path interference light-splitting device, the invention further provides a high-flux high-stability coherent dispersion spectrum imaging system.

Description

technical field [0001] The invention belongs to the technical field of spectral imaging, and relates to a highly stable and large optical path difference common optical path interference spectroscopic device. 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] Interferometric spectroscopic technology is a main spectroscopic type in spectral imaging technology. The interference type can be divided into non-common o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/45
CPCG01J3/45G01J2003/451
Inventor 魏儒义李立英孙剑邹纯博张学敏段战军耿波
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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