Wide-band spectral light source

Abstract

The invention, which is applicable to the technical field of material analysis light source, provides a wide-band spectral light source that is realized based on the concept of combination of multiplespectrums. To be specific, a visible spectrum including a peak spectral line in a spectrum in a first direction of a deuterium lamp is filtered and removed by using a short-wave pass filter piece toobtain blue-light and ultraviolet spectrums; the blue-light and ultraviolet spectrums except the 400-nm part are filtered and removed in a second direction of the deuterium lamp by using a band-pass filter piece to obtain 400-nm blue-light part spectrum. Similarly, the visible part in a spectrum in a first direction of a tungsten lamp is weakened by using a visible attenuation filter piece and theblue-light and ultraviolet spectrums and the visible spectrum are filtered in a second direction of the tungsten lamp by using a long-wave pass filter piece. The spectrums that are obtained in the first direction and second direction of the deuterium lamp and the first direction and second direction of the tungsten lamp are combined by a light combining unit, so that an overall-smooth wide-band spectral light source with the near-infrared light strength doubled is obtained.

Description

technical field [0001] The invention relates to a light source for material analysis, and more specifically relates to a light source with broadband spectrum design characteristics for material spectrum analysis and measurement. Background technique [0002] At present, the broadband light source commonly used for spectral analysis in the market is a deuterium tungsten lamp, that is, the light emitted by the deuterium lamp and the tungsten lamp is combined by using a reflective structure or a transmission structure for spectral analysis and measurement. The spectra of tungsten and deuterium lamps are as figure 1 As shown (the absolute spectral intensity is not calibrated), 101 is the spectrum of the tungsten lamp, 102 is the spectrum of the deuterium lamp, and 103 is the peak spectrum of the deuterium lamp at 656.1nm. figure 1 The medium spectrum is measured by a spectrometer with a CCD as a detector. Wherein the visible light peak in the tungsten lamp spectrum 101 is betw...

AI Technical Summary

Problems solved by technology

The light source can solve the problem that the deuterium lamp spectrum in the broadband spectrum has a sharp peak spectrum at 656.1nm, and the intensity of visible light relative to ultraviolet light and near-infrared light is too large to easily saturate the spectrometer with CCD or CMOS as the detector. It can solve the problem of near-infrared light in the broadband spectrum. The problem of low optical signal-to-noise ratio can also be solved. At the same time, it can also solve the problem that the broadband spectrum has a deuterium lamp spectrum that is relatively weak at 400nm. In addition, it can also solve the problems of excess heat and large volume due to the high power consumption of the two built-in tungsten lamps.

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