Infrared interference imaging spectrometer based on biplane right angle reflectors

Abstract

The invention provides an infrared interference imaging spectrometer based on biplane right angle reflectors. The infrared interference imaging spectrometer comprises a rotary platform, a beam splitter, a first right angle reflector, a second right angle reflector, an imaging object lens, a surface array detector and a control and information processing module. The beam splitter, the first right angle reflector, the second right angle reflector, the imaging object lens and the surface array detector are respectively installed on the rotary platform. The control and information processing module controls the rotary platform and the surface array detector and receives signals of the surface array detector. According to the invention, a static Michelson interference principle is utilized, one right angle reflector is dislocated in a direction perpendicular to an optical axis, and transverse cutting and light splitting of light beams are realized. Under a push-scan or rotation-scan mode, a space and spectrum information "data cube" is obtained.

Description

technical field [0001] The invention relates to the technical field of imaging spectroscopy, in particular to a static, high-throughput infrared interference imaging spectrometer based on double-plane right-angle mirrors. Background technique [0002] Interferometric imaging spectroscopy technology, compared with traditional dispersion spectroscopy imaging spectroscopy technology, has the advantages of high throughput and high signal-to-noise ratio, especially suitable for infrared bands with weak target radiation at room temperature, in the fields of industrial and agricultural production, environmental monitoring, material identification, etc. There are a wide range of applications. [0003] In 1991, the French Department of Space and Strategic Systems developed a Michelson interferometric time-modulated Fourier transform imaging spectrometer [DSimenoni.Newconceptforhigh-compactimagingFouriertransformspectrometer(IFTS)[C].SPIE,1991,1479:127-138]. The imaging spectrometer ...

AI Technical Summary

Problems solved by technology

However, the optical path of the spectrometer is too long, and the size of the field of view is limited, and the scene in one field of view needs to be scanned for a complete cycle to turn to the next field of view. Image motion compensation correction is required for large-area push-broom

[0006] To sum up, the moving mirror linear scanning and rotating mirror scanning principles of the time-modulated Fourier transform imaging spectrometer so far have their own characteristics, but they all have problems such as poor stability, complicated process, and limited field of view; while the space-time mixed modulation type The window-sweep static infrared Fourier transform imaging spectrometer system has the problem that the effective aperture of the corner reflector does not match the beam projection

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