Optical: systems and elements – Single channel simultaneously to or from plural channels
Reissue Patent
2007-12-25
2007-12-25
Dang, Hung Xuan (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
C359S490020, C359S490020
Reissue Patent
active
09987953
ABSTRACT:
A polarizing conversion device in accordance with the invention includes a first optical element for condensing an incident beam and forming a plurality of intermediate beams spatially separated from one another, and a second optical element for spatially separating each intermediate beam into two polarized beams and aligning the polarization directions of the polarized beams, thereby obtaining the same type of polarized beams. In the second optical element, a shading plate is placed to prevent light from directly entering a section corresponding to a reflecting plane of a polarizing separation unit array. Since the ability of separating the intermediate beam into two polarized beams is thereby enhanced, it is possible to perform conversion into the same type of polarized beams polarized in the same direction, with high efficiency.
REFERENCES:
patent: 2748659 (1956-06-01), Geffcken et al.
patent: 3788740 (1974-01-01), Shogren
patent: 4560999 (1985-12-01), Tokuhara
patent: 5164854 (1992-11-01), Takanashi et al.
patent: 5184248 (1993-02-01), de Vaan et al.
patent: 5387991 (1995-02-01), Mitsutake et al.
patent: 5528720 (1996-06-01), Winston et al.
patent: 5555186 (1996-09-01), Shioya
patent: 5566367 (1996-10-01), Mitsutake et al.
patent: 5751480 (1998-05-01), Kitagishi
patent: 5978136 (1999-11-01), Ogawa et al.
patent: 6154320 (2000-11-01), Itoh et al.
patent: 59-127019 (1984-07-01), None
patent: A-61-90584 (1986-05-01), None
patent: A-3-256025 (1991-11-01), None
patent: 04-230705 (1992-08-01), None
patent: A-5-72417 (1993-03-01), None
patent: A-5-107505 (1993-04-01), None
patent: A-6-18714 (1994-01-01), None
patent: 06-018714 (1994-01-01), None
patent: A-6-202046 (1994-07-01), None
patent: A-7-294906 (1995-11-01), None
patent: A-8-114765 (1996-05-01), None
Hashizume Toshiaki
Itoh Yoshitaka
Dang Hung Xuan
Spector David N.
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