Compact Fresnel two-sided mirror full reflection large visual field interference imaging optical spectrometer light path structure

A technology of interference imaging and double-sided mirror, which is applied in the field of imaging spectrum, can solve the problems that have not yet been involved in the realization of collimation and interference integrated optical structure total reflection Fourier transform imaging spectrometer, so as to improve the utilization rate of light energy and improve the image quality , the effect of shortening the volume

Inactive Publication Date: 2009-02-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Although we have proposed a total reflection Fourier transform imaging spectrometer using Fresnel double-sided mirrors in Chinese patent 200510055609.X, we have not yet involved in the...

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  • Compact Fresnel two-sided mirror full reflection large visual field interference imaging optical spectrometer light path structure
  • Compact Fresnel two-sided mirror full reflection large visual field interference imaging optical spectrometer light path structure
  • Compact Fresnel two-sided mirror full reflection large visual field interference imaging optical spectrometer light path structure

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Embodiment

[0023] Such as figure 2 As shown in Fig. 1, the optical path structure of the compact Fresnel double-sided mirror total reflection large-field interferometric imaging spectrometer is mounted on the satellite platform to sample ground targets. image 3 Among them, the Y direction is the orbiting direction (slit length direction), the X direction is the satellite running direction, and the Z direction is the satellite height direction. The corresponding ground width in the Y direction is 50km, and the satellite orbit height is 750km.

[0024] The reflective front telescope 1 adopts an off-axis aspheric single mirror or combined optical path structure, with an equivalent focal length of about 250mm and an effective aperture of φ100mm. The slit 2 is located near the focal point of the image space of the reflective forward telescope 1, so the image of the measured object is formed on the incident surface of the slit. The exit light from the slit 2 is projected into the compact m...

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Abstract

An optical path structure for a compact Fresnel double mirror total-reflection large-field interference imaging spectrometer belongs to the technical field of earth-observation imaging spectrometers. The invention is composed of a reflective pre-posed telescope, an incident slit, a compact collimation structure, a Fresnel double mirror, an off-axis cylindrical reflector and a focal plane detector. The reflective pre-posed telescope enables the target to be imaged on a one-dimensional slit; the image of the slit is projected onto the compact collimation structure; the Fresnel double mirror structure is added in the collimation optical path, so that the light beam is collimated and cut into two beams of coherent parallel light with a certain intersecting angle at the same time; and the two light beams are focalized through the off-axis cylindrical reflector and finally projected to the surface of the focal plane detector so as to form one-dimensional interference fringe distribution and another one-dimensional gray image distribution. The invention is characterized by total reflection, compact collimation and interference structure, wide field of view, high luminous flux and small size of optical structure; and the structure can be applied to the aviation and spaceflight remote sensing earth observation field.

Description

technical field [0001] The invention relates to an optical path structure of a compact Fresnel double-sided mirror total reflection large field of view interference imaging spectrometer, belonging to the technical category of imaging spectrometers in the field of earth observation; in particular, it relates to imaging spectrometer technology with high resolution and large field of view, belonging to Imaging spectroscopy technology field. Background technique [0002] Fourier Transform Imaging Spectrometer belongs to Imaging Interferometer. Compared with traditional dispersive imaging spectrometers, Fourier transform imaging spectrometers have the characteristics of high luminous flux, high spectral resolution, and high signal-to-noise ratio, so they are especially suitable for Hyper Spectral Imaging in the field of aerospace and earth observation. From the perspective of optical principles, Fourier transform imaging spectrometers can be divided into two categories: temporal...

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Application Information

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IPC IPC(8): G01J3/453G02B27/00
Inventor 廖宁放梁敏勇赵达尊方俊永张丹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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