Spectral imaging system adopting variable-diameter fiber field-of-view divider to realize large field of view

A field of view divider and spectral imaging technology, applied in the field of imaging spectroscopy, can solve the problems of increased space size, increased detector cost, unavailability of technology, etc., and achieves the effect of easy downscaling and strong designability

CN108731807AActive Publication Date: 2018-11-02CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-02

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Abstract

The invention discloses a spectral imaging system adopting a variable-diameter fiber field-of-view divider to realize a large field of view. The spectral imaging system comprises a front telescopic optical system, the variable-diameter fiber field-of-view divider and a spectral light splitting system, wherein the front telescopic optical system is used for completing collection of large field-of-view spectral information at a focal plane thereof; the variable-diameter fiber field-of-view divider comprises multiple sets of input terminal fields of view, multiple sets of output terminal fields of view and a variable-diameter fiber bundle; a large-size linear field of view of the front telescopic optical system is divided to multiple sets of the input terminal fields of view and regrouped inthe multiple sets of output terminal fields of view, and the multiple sets of output terminal fields of view are connected with the spectral light splitting system; and the spectral light splitting system is used for performing image field of view splicing on spectral imaging bands of the multiple sets of output terminal fields of view, so as to form the complete large field-of-view imaging spectral information. The spectral imaging system can perform optical division and regrouping on the large field of view to form small field of view groups, reduces the requirements of the large-size linearfield of view for the size of a spectral detecting system, and facilitates the miniaturization of the light splitting element and detector elements as well as the integration of the spectral imagingsystem.
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Description

Technical field

[0001] The invention relates to the technical field of imaging spectroscopy, in particular to a spectral imaging system that adopts a variable-diameter optical fiber field of view splitter to realize a large field of view. Background technique

[0002] With the continuous improvement of informatization in today's society, space remote sensing information has become an important social and economic resource. The completion of many monitoring tasks related to the national economy and people's livelihood in the fields of aerial surveying and mapping, environmental monitoring, resource detection, etc. must be based on space remote sensing information. Conventional satellites and high-altitude aerial remote sensing have played an important role in earth observation, but many emergency dynamic surveys and monitoring that require high resolution and fast time cannot meet the application requirements. From the perspective of application requirements, increasing the field...

Examples

Embodiment Construction

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0021] See figure 1 The embodiment of the present invention provides a spectral imaging system that uses a variable-diameter optical fiber field of view splitter to achieve a large field of view. The system includes: a front telephoto optical system 10, a variable-diameter optical fiber field of view splitter 20, and a spectrum splitting system 30.

[0022] The front telephoto optical system 10 is used to complete the collection of large-field spectral information at its focal plane.

[0023] The variable-diameter optical fiber field of view divider 20 includes a large field of view at the...