Multi-LED combination broadband light source device based on multi-edge reflection cone

A broadband light source and reflector cone technology, applied in the field of broadband light source design, can solve the problem that a single LED light source is difficult to take into account the band coverage and low precision at the same time, and achieve the effects of low power consumption, low operating voltage and long service life

Active Publication Date: 2014-03-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Multi-LED combination broadband light source device based on multi-edge reflection cone
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  • Multi-LED combination broadband light source device based on multi-edge reflection cone

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Embodiment Construction

[0017] combine image 3 To illustrate this embodiment, the present invention is based on a multi-LED combined broadband light source device based on a polygonal reflection cone, which includes four 1 ,λ 2 ...λ 4 LED light source, off-axis parabolic quadrangular reflection cone, aspheric single lens. Among them, the center line of the quadrangular pyramid is coaxial with the central axis of the aspheric mirror to ensure that the light beam emitted by each LED is collimated and parallel to the center line of the quadrangular pyramid after being reflected by the corresponding off-axis polishing surface, and then enters the aspheric single lens, and then passes through the aspheric single lens Convergence, the wavelength range of the combined broadband light source is the superimposed combination of the four LED wavelength ranges.

[0018] In spectral analysis, LED combinations with corresponding peak wavelengths can be selected according to the analysis requirements of differe...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V13/04G01N21/31F21Y101/02F21K9/20F21K9/68F21K9/69F21Y115/10
Inventor 秦敏段俊方武江宇卢雪谢品华刘文清
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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