A small long-wave infrared imaging spectrometer and its imaging method

Abstract

The invention discloses a small-size long wave infrared imaging spectrograph which includes a pre-positioned teleobjective, a collimation objective lens, a variable phase filter system, an imaging optical system, a long wave infrared focal plane detector, an imaging electrical assembly and an interference figure processing module, wherein the variable phase filter system includes a fixed reflector, a moving mirror and a drive electrical machinery. The moving mirror moves along the normal while driven by the drive electrical machinery. The invention also discloses an imaging method of the spectrograph which can collect spectrograph image information as well as acquire the interference figure of the infrared radiation signals of a 2D objective occasion, such that the collection rate of the spectrograph image information is increased. Compared with traditional interference infrared imaging spectrograph, the spectrograph can effectively prevent vibration, has smaller size and more reliable performances.

Description

technical field [0001] The invention belongs to the technical field of infrared spectrum imaging, and in particular relates to a small long-wave infrared imaging spectrometer and an imaging method thereof. Background technique [0002] Infrared imaging spectrometer can provide scene image information and spectral information at the same time, so as to deeply analyze the composition and characteristics of scene targets. It is an important observation, analysis and detection equipment. At present, infrared imaging spectrometers have been widely used in stealth target reconnaissance, dangerous gas detection, environmental pollution monitoring, resource exploration, maritime search and rescue, etc., and are gradually becoming an important market growth point in the field of photoelectric imaging. [0003] Compared with ordinary infrared thermal imaging cameras, infrared imaging spectrometers add spectroscopic components (interferometers, optical filter devices or dispersion devi...

AI Technical Summary

Problems solved by technology

[0003] Compared with ordinary infrared thermal imaging cameras, infrared imaging spectrometers add spectroscopic components (interferometers, optical filter devices or dispersion devices, etc.), which also lead to a substantial increase in its volume and weight, limiting its application range

Especially in the long-wave infrared range, the resolution of optical filters and dispersive devices is low, and the signal energy attenuation is serious; and the time-modulated spectroscopic technology based on the traditional Michelson interferometer also has the problems of large volume, weight and high cost

Images