Broadband color filters with arbitrary spectral transmittance using a liquid crystal tunable filter (LCTF)

Kanae Miyazawa; Kazuhiko Kurashiki; Markku Hauta-Kasari; Satoru Toyooka

doi:10.1117/12.464569

6 June 2002 Broadband color filters with arbitrary spectral transmittance using a liquid crystal tunable filter (LCTF)

Kanae Miyazawa, Kazuhiko Kurashiki, Markku Hauta-Kasari, Satoru Toyooka

Proceedings Volume 4421, 9th Congress of the International Colour Association; (2002) https://doi.org/10.1117/12.464569
Event: 9th Congress of the International Color Association, 2001, Rochester, NY, United States

Abstract

We propose an experimental setup for an imaging system using a liquid crystal tunable filter (LCTF) to implement rewritable transparent broad-band color filters with arbitrary spectral transmittances. Holding-time for each transmitting wavelength of the LCTF is controlled corresponding to a computationally designed filter function, and a time-integrated intensity image is taken with a monochrome CCD camera through the LCTF. The averaged norm error between the implemented and the expected filter functions was about 10%. The system can be applied to spectral estimation, spectral based classification and spectral based parametr estimation.

Citation Download Citation

Kanae Miyazawa, Kazuhiko Kurashiki, Markku Hauta-Kasari, and Satoru Toyooka "Broadband color filters with arbitrary spectral transmittance using a liquid crystal tunable filter (LCTF)", Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); https://doi.org/10.1117/12.464569

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