A Liquid Crystal Tunable Spectral Filter: Visible And Infrared Operation

W. Gunning; J. Pasko; J. Tracy

doi:10.1117/12.959943

21 July 1981 A Liquid Crystal Tunable Spectral Filter: Visible And Infrared Operation

W. Gunning, J. Pasko, J. Tracy

Proceedings Volume 0268, Imaging Spectroscopy I; (1981) https://doi.org/10.1117/12.959943
Event: 1981 Los Angeles Technical Symposium, 1980, Los Angeles, United States

Abstract

The large optical anisotropy of liquid crystal molecules is employed to realize an efficient, voltage tunable Fabry-Perot filter. Tuning has been demonstrated in both the visible and middle infrared. The small voltages required to tune over one free spectral range (FSR) result in a device having greater potential for designing filters having a larger range of FSRs, and therefore bandpass widths, than is possible for the solid electro-optic Fabry-Perot described in previous work.1 We show that for many commercially available liquid crystal materials, infrared operation is possible over wide regions where molecular absorptions do not occur.

Citation Download Citation

W. Gunning, J. Pasko, and J. Tracy "A Liquid Crystal Tunable Spectral Filter: Visible And Infrared Operation", Proc. SPIE 0268, Imaging Spectroscopy I, (21 July 1981); https://doi.org/10.1117/12.959943

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