Rotary Fourier transform interference imaging spectrometer

Abstract

The invention discloses a rotary Fourier transform interference imaging spectrometer, which includes a front collimation objective, a cube corner reflector, a beamsplitter, a rear imaging objective, a detector and a control and processing module, aims to reduce the light energy loss of a target, and has the characteristics of high luminous flux and detection sensitivity. The traditional rectilinear motion scanning manner of a moving mirror is substituted by the rotary scanning manner of the beamsplitter or the cube corner reflector, so as to avoid series of technical difficulties brought by precise rectilinear scanning of the moving mirror; a lateral shear interferometer based on the Michelson interference principle is adopted, and the characteristic of common path is obtained, so that the interference effect cannot be influenced even if the beamsplitter slightly shakes during the rotation; a planemirror in the traditional Fourier transform imaging spectrometer is substituted by the cube corner reflector, so that the problem brought by the inclined planemirror is avoided; therefore, the stability, reliability and vibration and impact resistance of the instrument are improved, and the structure of the spectrometer is more compact.

Description

technical field [0001] The invention relates to the field of spectral imaging, in particular to a high-throughput and high-stability rotary Fourier transform interference imaging spectrometer. Background technique [0002] 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. It expands the field of spectral research, has received widespread attention from all over the world, and has developed rapidly. It is widely used in the fields of physical evidence identification, agricultural production, resource exploration, environmental monitoring, disaster prevention and mitigation, material identification, and public safety. [0003] The Fourier transform spectrometer based on time modulation has higher spectral resolution and sensitivity, but it requires high stability of the measurement platform. In order to achieve high-precisi...

AI Technical Summary

Problems solved by technology

The two spectrometers using this principle cannot make the sagnac structure into a solid body, the angle between the beam splitter and the two mirrors is strictly limited, it is not easy to install and adjust, the structure is not compact, and the stability is poor

[0008] To sum up, so far, the linear moving mirror scanning and rotating mirror scanning principles of time-modulated Fourier transform spectrometers have their own characteristics, but they all have poor stability, high requirements for rotating mirror materials, and images that cannot be directly obtained. , and low luminous flux, difficult to install and adjust, not compact structure and other problems

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