Full-waveband window-free wavelength standard light source and wavelength calibration method

Abstract

The invention discloses a full-waveband window-free wavelength standard light source and a wavelength calibration method and relates to the field of wavelength standard light sources. The light sourcecomprises a wide spectrum light source, an achromatic lens pair, a pinhole, a first collimating lens, an optical etalon, a semi-reflective semi-transparent beam splitter, a second collimating lens and an atomic spectrum line light source which are sequentially arranged. The wide spectrum light source is combined with the achromatic lens pair and the pinhole to emit spatially filtered continuous spectrum light beams, the continuous spectrum light beams are filtered by an optical etalon to generate light beams of a comb-shaped spectrum, and then the light beams of the comb-shaped spectrum and light beams emitting known atomic spectral lines are combined by using the semi-reflective semi-transparent beam splitter to obtain light beams with the known atomic spectral lines in the comb-shaped spectrum.

Description

technical field [0001] The invention relates to the field of wavelength standard light sources, in particular to a full-band wavelength standard light source without empty windows and a wavelength calibration method. Background technique [0002] At present, the standard light source used for wavelength calibration of the spectrometer usually adopts light sources with atomic emission lines such as neon lamps, mercury lamps, argon lamps, etc. (Wang Pengcheng et al., Acta Metrology, 2007, Vol. Page), these standard light sources contain a limited number of spectral lines and uneven distribution, often leaving empty windows in some bands. When using these atomic spectral line lamp sources for spectral calibration, due to the limited number of standard spectral lines and uneven distribution, it is difficult to accurately grasp the wavelength deviation trend of each position on the spectral axis, although better calibration can be obtained near the spectral line position , and i...

AI Technical Summary

Problems solved by technology

However, the wavelength of these spectral lines depends on the cavity length of the etalon, is affected by processing accuracy, and is easily changed by factors such as temperature and stress, so it is difficult to become a constant wavelength standard light source

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