Acousto-optic tunable filter imaging spectrometer

An imaging spectrometer and tuning filter technology, which is applied in the field of remote sensing detection, can solve the problems of band pixel registration and complex structure, etc., and achieve good self-calibration characteristics, improved luminous flux, and good wavelength reproducibility.

Inactive Publication Date: 2009-10-21
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an imaging spectrometer with an acousto-optic tunable filter, which solves the technical problems of complex structure of traditional imaging spectrometers and registration between pixels of each band

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  • Acousto-optic tunable filter imaging spectrometer

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Embodiment Construction

[0024] The following is based on Figure 1 ~ Figure 3 A preferred embodiment of the present invention is given to illustrate the structural features, technical performance and functional features of the present invention, but not to limit the scope of the present invention.

[0025] The main technical indicators of the system are as follows:

[0026] ●Spectral range: 1250~2500nm

[0027] ●Spectral resolution: <15nm

[0028] ●Number of bands: 64

[0029] ●Instantaneous field of view: 0.8mrad

[0030] ●Imaging field of view: 12°×12°

[0031] The system includes the following parts:

[0032] 1) Front optics

[0033] The front optical system mainly includes a telescope 1, a field diaphragm 2 and a collimating mirror 3, which are self-designed in this embodiment, and the parameters are as follows:

[0034] Telescope 1: f=36.5mm D=1.5mm

[0035] Field diaphragm 2: 7.68mm×7.68mm

[0036] Collimator 3: f=103.6mm D=3mm

[0037] 2) Acousto-optic tunable filter

[0038] The sh...

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Abstract

The invention discloses an acousto-optic tunable filter imaging spectrometer which is applied to the field of remote sensing. The invention relates to a hyperspectral imaging technology in the remote sensing field and an integrated system, wherein the technology is a novel method by combining an acousto-optic tunable filter taken as a band selector with area array imaging technology; and the system comprises a pre-optical system, the acousto-optic tunable filter, a post-optical system, an area array detector, a radio-frequency signal generator and a data collecting system. The invention can be applied to various remote sensing fields of ground detection, airborne detection, satellite-borne detection and deep space detection, passively receives reflex of an object to obtain an atlas cube of the object to be detected and can flexibly choose observation wave band by an electric tuning way.

Description

technical field [0001] The invention relates to hyperspectral imaging technology, in particular to an acousto-optic tunable filter imaging spectrometer, which is used in the field of remote sensing detection. Background technique [0002] Many minerals and rocks have distinguishable absorption and reflection features. In the mid-1970s, the United States successively carried out indoor spectrometry and field spectroscopic research with remote sensing of geological minerals as the main content, and conducted a large number of aviation experiment flights, and finally determined In order to identify geological minerals, soil characteristics and vegetation information, the best band is (2.08-2.35μm, 1.55-1.75μm). Substance identification by means of spectroscopy has been widely used. The imaging spectroscopy technology organically combines two-dimensional imaging technology and spectral technology, which can not only image the shape of objects, but also provide rich spectral inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
CPCG01J3/1256G01N2021/1793G01J3/2823G01J3/027G01N21/17G01J3/0208
Inventor 王建宇舒嵘何志平龚玉梅林颖
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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