Optical: systems and elements – Light interference – Produced by coating or lamina
Reexamination Certificate
2005-05-31
2005-05-31
Nguyen, Thong (Department: 2872)
Optical: systems and elements
Light interference
Produced by coating or lamina
C359S577000, C359S583000, C398S081000, C398S147000
Reexamination Certificate
active
06900940
ABSTRACT:
A VIPA plate having a configuration where a translucent reflection film and a total reflection film are respectively arranged on one side and the other side of a transparent parallel plate can be used as a wavelength dispersion compensator by using a special mirror and a lens. However, the transparency characteristic of the wavelength dispersion compensator using such a VIPA plate is a periodical characteristic which is asymmetric with a central wavelength in a wavelength regime. Accordingly, not parallel light but converged or diverged light having angular dispersion is input to an etalon plate, so that a filter whose transparency characteristic is an asymmetric periodical characteristic which is reverse to the VIPA plate is configured for the central wavelength in the wavelength regime. With this filter, the transparency characteristic of the wavelength dispersion compensator using the VIPA plate is optimized.
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G. R. Fowles, ‘Introduction to Modern Optics’, Dover Publications, New York, pp. 86-103, 1968.*
Japanese Published Patent Application No. 2000-511655A (Reference AL) corresponds to U.S. Appl. No. 5,930,045 (Reference AA).
Japanese Published Patent Application No. 2000-514323A (Reference AL) corresponds to U.S. Appl. No. 5,969,865 (Reference AB).
Japanese Published Patent Application No. 11-72756 has an English abstract attached thereto.
Japanese Published Patent Application No. 7-49469 has a partial English translation attached thereto.
Izumi Hirotomo
Kawahata Yuichi
Mitamura Nobuaki
Lavarias Arnel C.
Nguyen Thong
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