C-T structure imaging system based on holographic concave grating

Abstract

The invention provides a C-T structure imaging system based on a holographic concave grating. The problems that an existing C-T optical system is complex in structure, large in size, high in cost andlow in energy utilization rate are solved. The system comprises a front optical telescopic unit, a diffraction unit, a detection unit and a data acquisition control unit; the front optical telescopicunit comprises a front lens group, a diaphragm and a collimating lens; the diffraction unit comprises the holographic concave grating; the diaphragm is located on an image side focal plane of the front lens group and coincides with an object side focal plane of the collimating lens; the collimating lens is used for collimating and correcting the incident light; the holographic concave grating is positioned on a reflection light path of the collimating lens and is used for splitting incident parallel light and focusing light with the same wavelength in split light beams to the surface of the detection unit; and the detection unit comprises a detector, and the detector is located on the image side focal plane of the holographic concave grating and used for receiving an optical signal split by the incident direction target and transmitting the optical signal to the data acquisition control unit for processing.

Description

Technical field [0001] The invention belongs to the imaging field, and particularly relates to a C-T structure imaging system based on a holographic concave grating. Background technique [0002] Imaging spectroscopy technology is a detection technology that integrates image information and spectrum information. It is known as a leap in the history of optical instrument development by obtaining a "map data cube" to analyze the detection target, which has far surpassed traditional panchromatic optics. Camera (can only obtain target contour and grayscale features). Due to the large amount of data acquired by imaging spectroscopy technology, it is widely used in many fields, such as aerospace, environmental monitoring, marine environment detection, etc. As the core part of the imaging spectrometer, the optical system determines the spectral range, dispersion rate and resolution of the spectrometer. The traditional cross-type Czerny-Turner (CT) optical path and the basic CT optical...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of relatively complex structure, relatively large volume, relatively high cost and low energy utilization rate in the existing C-T optical system, and proposes a C-T structure imaging system based on a holographic concave grating. The invention further simplifies the structure of the existing C-T optical system, reduces the volume, reduces the cost of small spectrometers, and improves its energy utilization

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