A Design of Optical Filter Based on Conjugate Interference

Zheng Ying Li; Lou Zheng

doi:10.4028/www.scientific.net/AMR.1033-1034.449

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1033-1034A Design of Optical Filter Based on Conjugate...

A Design of Optical Filter Based on Conjugate Interference

Abstract:

In this paper, a conjugate interference filter which could be used in gas sensing is presented .The filter consists of two large spot collimators and a gas etalon which has two separate cells:absorption gas chamber and non-absorption gas chamber. When cascading the broadband light to the filter , only light absorbed by the target gas can pass through the filter and the spectrum of output light matches well with the absorption spectrum of target gas.By changing the target gas in the absorption chamber ,filter for various kind of gases can be implemented. In this paper, acetylene is selected as the target gas and the spectrum of light through the filter completely matches the absorption peak of acetylene after parameter adjustments.

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Periodical:

Advanced Materials Research (Volumes 1033-1034)

Pages:

449-452

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.449

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Online since:

October 2014

Authors:

Zheng Ying Li*, Lou Zheng

Keywords:

Conjugate Interference, Filter, Gas Sensing

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