Light path structure of scanning and imaging spectrometer

A technology of scanning imaging and spectrometer, which is applied in the field of spectrometer, can solve the problems of large aberration, impossibility, high spectral resolution and imaging resolution, etc., and achieve the effect of reducing aberration and reducing off-axis angle

Inactive Publication Date: 2011-02-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The aberration of this type of structure is large, and it is impo

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  • Light path structure of scanning and imaging spectrometer
  • Light path structure of scanning and imaging spectrometer
  • Light path structure of scanning and imaging spectrometer

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Embodiment Construction

[0023] In the following, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. figure 2 Shown is a schematic diagram of an optical path structure of a scanning imaging spectrometer according to an embodiment of the present invention. The optical system of the spectrometer includes a) scanning mirror 1, b) aperture 2, c) telescopic objective lens 3, d) slit 4, e) collimating objective lens 5, f) plane grating 6, g) focusing objective lens 7 , h) detector 8 .

[0024] The incident light reflected by the scanning mirror 1 passes through the diaphragm 2 and then is reflected and focused by the telescopic objective lens 3 to the slit 4, and then reflected by the collimating objective lens 5 to the plane grating 6 for splitting, and then focused by the focusing objective lens 7 to the detector 8 image on the photosensitive surface.

[0025] Depend on figure 1 It can be seen that the traditional crossed C...

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Abstract

The invention relates to a light path structure of a scanning and imaging spectrometer, comprising a scanning mirror (1), a diaphragm (2), a telescope objective (3), a collimator objective (5), a raster (6) and a focusing objective (7). The scanning mirror (1) is used for reflecting incident light from a target, the diaphragm (2) is used for selecting light in a certain FOV (Field Of View) to enter the spectrometer, the telescope objective (3) is used for focusing light passing through the diaphragm in a silt (4), the collimator objective (5) is used for reflecting light passing through the silt to the raster (6) which is used for splitting light, and the focusing objective (7) is used for focusing the split light on the photosurface of a detector (8) for spectroscopic imaging. Spectral data in a two-dimensional space can be acquired through the scanning of the scanning mirror (1) on spectral dimensions. The spectrometer adopts all-reflective type optical elements, and all the reflecting elements are respectively coated with a high-reflectivity film. The light path structure is structurally characterized in that the space is shared by a telescopic imaging light path and a spectroscopic imaging light path, an off-axis angle between the optical elements is reduced on a basis of keeping the original system size and the spectral resolution and the imaging resolution of the spectrometer are greatly improved.

Description

technical field [0001] The invention relates to a spectrometer, in particular to an optical path structure of a scanning imaging spectrometer. Background technique [0002] Imaging spectroscopy technology originated from multispectral remote sensing technology in the early 1970s, and developed with the needs of earth observation applications. It is an emerging field that combines imaging technology and spectroscopy technology. The imager obtains the image information of the target, pursues high-definition and studies its spatial characteristics; the spectrometer separates the radiation of the target into spectral radiation of different wavelengths, pursues high spectral resolution, and then measures and analyzes the target. The crystallization of the fusion of these two technologies-imaging spectrometer can obtain hyperspectral images of specific bands of the target to be measured, and has the advantage of integrating the spectrum. [0003] Dispersion-type imaging spectrome...

Claims

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Application Information

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IPC IPC(8): G01J3/02G01J3/28
Inventor 唐义吴雁刘健鹏倪国强张止戈
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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