Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1998-09-14
2000-02-29
Mack, Ricky
Optical: systems and elements
Optical modulator
Light wave temporal modulation
G02B 2600
Patent
active
060316551
ABSTRACT:
A spatial light modulator is formed of a pair of transparent substrates, and a photoconductor layer, an optical modulation layer and a color filter layer disposed in lamination between the substrates. The photoconductor layer is designed to have a spectral sensitivity characteristic including an average sensitivity to blue light, an average sensitivity to green light and an average sensitivity to red light, of which a maximum and a minimum provide a ratio. S.sub.MAX /S.sub.MIN therebetween of at most 10, and a spectral transmittance characteristic including an average transmittance in a wavelength range of 420-480 nm, an average transmittance in a wavelength range of 520-560 nm and an average transmittance in a wavelength range of 600-660 nm, of which a maximum and a minimum provide a ratio T.sub.MAX /T.sub.MIN of at most 10. As a result, it becomes possible to provide a compact picture-forming and display apparatus of a see-through type by disposing a white writing light source and a white reading light source on a same side of the spatial light modulator.
REFERENCES:
patent: 4052208 (1977-10-01), Martinelli
patent: 4916470 (1990-04-01), Kovac et al.
patent: 5731797 (1998-03-01), Akiyama et al.
Canon Kabushiki Kaisha
Mack Ricky
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