Multilayered phase difference plate and projector

Details Multilayered phase difference plate and projector Multilayered phase difference plate and projector

2008-03-19

2010-12-21

Font, Frank G (Department: 2872)

Optical: systems and elements

Polarization without modulation

Depolarization

C353S020000, C359S490020, C359S506000

Reexamination Certificate

active

07855834

ABSTRACT:
There is provided a multilayered phase difference plate that serves as a half-wavelength phase difference plate in the range of 400 nm to 700 nm by bonding together a first phase difference plate and a second phase difference plate in a manner that their respective optical axes intersect each other. The multilayered phase difference plate obtains a high incident light polarization conversion efficiency because the respective plate thicknesses of the first and second phase difference plates are within a range such that phase difference deviation amounts become offset by each other.

REFERENCES:
patent: 6856304 (2005-02-01), Hirakata et al.
patent: 7618715 (2009-11-01), Ushino et al.
patent: 2008/0100759 (2008-05-01), Tateno
patent: A-2004-170853 (2004-06-01), None
patent: A-2006-201302 (2006-08-01), None
patent: A-2006-330282 (2006-12-01), None

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