A multi-led combined broadband light source device based on polygonal reflection cones

Abstract

The invention relates to a multi-LED combination broadband light source device based on a multi-edge reflection cone, and relates to the designing field of broadband light sources suitable for the spectrum analysis. The problems that in an existing spectrum analysis, power consumption is high and the service life is short by adopting a xenon arc lamp and other broadband thermal light sources, and a spectrum coverage wave band is too narrow by utilizing a single LED cold light source are solved. A plurality of efficient LEDs with different peak wavelengths are adopted to be combined, an optical system is formed by the efficient LED combination, the off-axis cast surface multi-edge reflection cone and an aspheric surface single lens, the LEDs can be efficiently combined, the combined broadband light source has the advantages that power consumption is small, the service life is long, energy is saved, environmental protection is facilitated, and the spectrum wave band range can be widened according to the demands, the multi-LED combination broadband light source device is suitable for the spectrum analysis application and especially suitable for a broadband light source needed by the differential optical absorption spectroscopy technology, and accuracy measurement of various trace gases can be carried out on multiple spectrum wavebands at the same time.

Description

technical field [0001] The invention relates to the field of broadband light source design for spectral analysis, and is suitable for the broadband light source required for spectral analysis. Background technique [0002] Spectral analysis technology can use different molecules to perform qualitative and quantitative measurements of the characteristic absorption of light radiation in the wavelength band. Information such as the composition and concentration of a substance can be obtained by analyzing its absorption spectrum. This technology is widely used in the fields of atmospheric toxic and harmful gas monitoring and water body monitoring. Typical broadband light sources commonly used in this technology are thermal light sources such as xenon arc lamps and tungsten-halogen lamps. Taking xenon arc lamps as an example, the main shortcomings are: high power consumption, low luminous efficiency, and most of the energy is dissipated in the form of heat; The trigger voltage ...

AI Technical Summary

Problems solved by technology

When analyzing the composition of a substance based on the spectrum, it is usually necessary to select the characteristic absorption peak of the substance. The more characteristic absorption peaks selected, the higher the measurement accuracy. However, when a single LED is used as a light source due to its relatively narrow full width at half maximum, the selected substance to be measured The characteristic absorption peaks of the components are also less, and the accuracy is relatively low; and for different substances to be tested, because the characteristic absorption peaks are in different band ranges, it is difficult for a single LED light source to simultaneously cover the band coverage of the characteristic absorption peaks of various material components scope

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