Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1996-11-07
1999-12-07
Henry, Jon
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 15, 349 5, 349 9, 349 95, 349 96, G02B 532, G02F 11335
Patent
active
059992824
ABSTRACT:
An improved color filter and a color image display apparatus employs the filter, the color filter has a hologram device for spectrally diffracting an incident light into plural light beams of different wavelength regions and selectively converging the plural light beams on respective plural picture element electrodes corresponding to the different wavelength regions. The hologram device has such characteristics that S-polarized components of the incident light are diffracted at a maximum diffraction efficiency at a predetermined incident angle of the incident light, and P-polarized components of the incident light are diffracted as such that a difference between the maximum diffraction efficiency of the S-polarized components and the diffraction efficiency of the P-polarized components is not less than 30%, and the diffracted S-polarized components are formed as the plural light beams to be converged on the plural picture element electrodes corresponding to the different wavelength regions.
REFERENCES:
patent: 4807978 (1989-02-01), Grinberg et al.
patent: 5506701 (1996-04-01), Ichikawa
patent: 5727040 (1998-03-01), Ichikawa et al.
Nakagaki Shintaro
Suzuki Tetsuji
Henry Jon
Lieberstein Eugene
Meller Michael N.
Victor Company of Japan Ltd.
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