High Stability Rotating Mirror Interferometer

Abstract

The invention discloses a highly-stable rotating-mirror interferometer comprising a first beam splitter, a second beam splitter, a first plane reflecting mirror, a second plane reflecting mirror, a third plane reflecting mirror, a connecting mechanism and a tilt reflecting mirror. The beam splitting film of the first beam splitter is parallel to the first plane reflecting mirror; the second plane reflecting mirror and the third plane reflecting mirror are arranged parallelly to form a parallel reflecting mirror group fixedly connected to a rotary shaft; the parallel reflecting mirror group and the connecting mechanism are fixedly arranged, and the first beam splitter, the first plane reflecting mirror and the connecting mechanism are fixedly arranged; the tilt reflecting mirror is provided with a tilt angle, and the emergent light of the parallel reflecting mirror group vertically enters the tilt reflecting mirror. The incident light and the emergent light are parallel to each other by arrangement of the pair of parallel plane mirrors, system self-stability is improved and detection time is reduced by rotation of the first plane reflecting mirror and plan mirror group, system structure is simple, and processing, mounting and adjusting difficulties and production cost are lowered.

Description

technical field [0001] The invention relates to the technical field of spectrum detection and imaging, in particular to a high-stability time-modulated double-beam interferometer. Background technique [0002] Fourier Transform Infrared Spectrometer (FTIR) is an instrument that uses light interference to measure the spectrum of a target. It has a series of advantages such as multi-channel, high throughput, high signal-to-noise ratio, and high accuracy. It is widely used in industry and agriculture. It has a wide range of applications in production, scientific research, environmental monitoring, food safety, aerospace remote sensing and other fields. [0003] The interferometer is the core component of FTIR, and the performance of the interferometer determines the quality of the measurement results of the instrument. At present, FTIR interferometers are usually based on Michelson interferometers and their deformation structures. The structure is usually composed of three par...

AI Technical Summary

Problems solved by technology

However, this kind of interferometer generally needs to be composed of a rotating mirror and multiple fixed mirrors. The structure is relatively complicated, which increases the difficulty of design and development, and also has a certain impact on portability.

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