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Broadband high spectral resolution imaging system for foundation-to-moon observation

An imaging system and wide-band technology, which is applied in the field of imaging spectroscopy and radiation calibration, can solve the problems of discontinuous observation spectrum, low spectral resolution, and small number of spectral segments, so as to improve detection sensitivity, signal-to-noise ratio, hyperspectral The effect of resolution and bandwidth

Active Publication Date: 2015-12-23
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the problems of the existing ground-based lunar observation system using a filter type spectral imager, such as narrow band, small number of spectral segments, discontinuous observation spectrum, and low spectral resolution, the present invention proposes a ground-based lunar observation system. Broadband Hyperspectral Resolution Imaging System

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, the wide-band high-spectral resolution imaging system for ground-based observation of the moon of the present invention mainly includes a coaxial double-mirror telescope, a visible-near-infrared (VNIR) spectral imaging system and an infrared (IR) spectral imaging system.

[0039] Said coaxial double mirror telescope is made up of primary mirror 1 and secondary mirror 2. Quadric coefficient K of primary mirror 1 1 Satisfy: -1≤K 1 ≤-1.5,K 1 The best value is -1.05; the quadratic surface coefficient K of the secondary mirror 2 2 Satisfy: -1.5≤K 2 ≤-5,K 2 The best value is -3.61; the blocking ratio of the secondary mirror 2 to the primary mirror 1 is less than 30%.

[0040] The zoom ratio β of the visible-near-infrared spectral imaging system 1 Satisfy: 0.98≤β 1 ≤1.02. The visible near-infrared spectrum imaging system con...

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Abstract

The invention provides a broadband high spectral resolution imaging system for foundation-to-moon observation, and relates to the technical field of imaging spectrum and radiometric calibration, and can solve the problem that a foundation-to-moon observation system employing an existing optical filter type spectrum imager is narrow in wave band, less in number of spectra sections, discontinuous in spectral observation and low in the spectral resolution. The system comprises a primary mirror, a secondary mirror, an incident slit, a wedge form color separation film, a first VNIR reflector, a VNIR convex raster, a second VNIR reflector, a VNIR plane turnover mirror, a VNIR level selection optical filter, a VNIR focal plane detector, a first IR reflector, an IR convex raster, a second IR reflector, an IR level selection optical filter and an IR focal plane detector. The broadband high spectral resolution imaging system for foundation-to-moon observation utilizes the moon-to-earth motion to adjust the angle of a rotary table to realize broadband and high resolution scanning observation of the whole moon disc. The broadband high spectral resolution imaging system for foundation-to-moon observation utilizes the wedge form color separation film to realize simultaneous detection of the visible near-infrared wave band and infrared wave band, and has the advantages of being wide in wave band, increasing the number of spectra sections, being continuous in spectral observation, and being high in spectral resolution and spectral purity.

Description

technical field [0001] The invention relates to the fields of imaging spectrum technology and radiation calibration technology, in particular to a wide-band high-spectral resolution imaging system for ground-based observation of the moon. Background technique [0002] Quantitative remote sensing is the key direction for the development of remote sensing fields such as atmosphere and ocean. The calibration of space remote sensors is the premise of the quantification of remote sensing information. The reliability of remote sensing data and the depth and breadth of applications depend to a large extent on the calibration accuracy of remote sensors. At the same time, the calibrated data does not depend on the data of the remote sensor, and its radiation value still maintains the physical information of the target structure and composition. If a natural star with known radiation properties is available, it is a very valuable calibration source. The moon is the only natural star...

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Application Information

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IPC IPC(8): G01J3/28
Inventor 薛庆生王淑荣
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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