Regular paper

[OPTICAL REVIEW Vol. 8, No. 2 (2001) 112-119]

Rewritable Broad-Band Color Filters for Spectral Image Analysis

Kanae MIYAZAWA,¹ Markku HAUTA-KASARI² and Satoru TOYOOKA^1,*

¹Graduate School of Science and Engineering, Saitama University, 255, Shimo-okubo, Urawa, Saitama, 338-8570 Japan, ²Department of Computer Science, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu, Finland

(Received December 14, 2000; Accepted January 4, 2001)

We propose an optical system to implement rewritable transparent broad-band color filters. The filter consists of a linear variable filter and a liquid crystal spatial light modulator in which an expected filter function is written. A time-integrated intensity image was taken while the filter was passing the lens aperture of a CCD camera. The averaged norm error between the implemented and the expected filter functions was about 5.4%. The system was applied to spectral estimation in a two-dimensional color image.

Key words: spectral imaging system, rewritable broad-band color filter, linear variable filter, liquid crystal spatial light modulator

OPTICAL REVIEW HomePage

© 1994-2011 The Optical Society of Japan (An Affiliate of the Japan Society of Applied Physics)
Produced, Developed, and Maintained by The Optical Society of Japan (An Affiliate of the Japan Society of Applied Physics)
Printed in Japan by Komiyama Printing Co., Ltd.

mail to Editorial Office, OPTICAL REVIEW