Portable wide-spectrum fourier transformation spectrograph

Abstract

The invention discloses a portable wide-spectrum fourier transformation spectrograph and belongs to the technical field of spectral measurement. The spectrograph comprises an optical structure, a linear array CCD (Charge Coupled Device) and a data acquisition system, wherein the optical structure comprises a reflector, a pinhole filter and an improved fresnel double-sided lens; the reflector, the pinhole filter, the improved fresnel double-sided lens and the linear array CCD are sequentially arranged in a light path from the reflector to the linear array CCD; the pinhole filter is positioned on a focus of the reflector; all light beams emitted by the pinhole filter fall on the improved fresnel double-sided lens; the linear array CCD is connected with the data acquisition system; and the data acquisition system processes interferogram data acquired by the linear array CCD by employing an aplanatic difference hyperbolic pattern model and a multi-pixel extraction method to form a spectrum. The spatial size of the spectrograph is greatly reduced, the portability can be realized, the light use efficiency is improved by approximately once, and the spectrograph has an important application in a dim light wide-spectrum detection occasion.

Description

technical field [0001] The invention belongs to the technical field of spectrum measurement, and more specifically relates to a portable wide-spectrum Fourier transform spectrometer. Background technique [0002] Compared with the grating dispersion spectrometer, the Fourier transform spectrometer has the advantages of high luminous flux, high wavelength accuracy and wide spectral measurement range. It is the most powerful and versatile spectroscopic instrument in the near infrared, mid infrared, far infrared and submillimeter bands. Among them, compared with the transmission structure Fourier transform spectrometer, the total reflection structure Fourier transform spectrometer has the outstanding advantages of wider spectral measurement range, no need for infrared lenses, and no chromatic aberration. [0003] At present, most of the Fourier transform spectrometers with total reflection structure are imaging spectrometers, typical representatives such as: "Fourier transform ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the Fourier transform spectrometer with total reflection structure is bulky, not portable, and has limited detection capability for weak radiation spectra, the present invention provides a portable wide-spectrum Fourier transform spectrometer with a large space volume of Miniaturized, it can be portable, and the utilization rate of light energy is nearly doubled, which is an important application in the detection of weak light and wide spectrum

Images