Tunable Optical Filter with Variable Bandwidth Based on Cholesteric Liquid Crystal


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An optical tunable filter with variable bandwidth has been demonstrated using two cholesteric liquid crystals. The incident light was first reflected by the first cholesteric liquid crystal and then by the second one. By rotating the two cholesteric liquid crystals simultaneously, the central wavelength can be tuned. By fixing one of the cholesteric liquid crystals and rotating the other one, the bandwidth of the tunable filter can be varied. The central wavelength of the tunable optical filter can be tuned from 513.4 nm to 576.8 nm and the bandwidth is varied from 10 nm to 80 nm. This property will allow it to be widely used in many fields, including optical communications and multispectral and hyperspectral imaging systems.



Solid State Phenomena (Volumes 181-182)

Edited by:

Yuan Ming Huang




S. C. Zhang and Y. H. Huang, "Tunable Optical Filter with Variable Bandwidth Based on Cholesteric Liquid Crystal", Solid State Phenomena, Vols. 181-182, pp. 273-276, 2012

Online since:

November 2011




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