Optics: image projectors – Lamp control – Lamp position adjustable
Reexamination Certificate
2007-05-15
2007-05-15
Perkey, W. B. (Department: 2851)
Optics: image projectors
Lamp control
Lamp position adjustable
C353S102000, C362S277000
Reexamination Certificate
active
10934365
ABSTRACT:
Exemplary embodiments of the present invention provide a lighting unit including a lamp device adjusted by a general-purpose measuring device at high working efficiency, and yet allowing efficient utilization of light from a light source. In a light source device, since a first fly's eye has a concave entrance surface having a predetermined curvature, luminous flux entering the first fly's eye optical system and passing through the entrance surface is collimated to be parallel with an optical axis. Accordingly, illumination lights entering respective liquid crystal light valves are precisely superposed while allowing the angles of incidence of respective partial luminous fluxes entering the respective liquid crystal light valves to fall within a predetermined angle range, thereby enhancing utilization efficiency of the illumination lights.
REFERENCES:
patent: 6246526 (2001-06-01), Okuyama
patent: 6467911 (2002-10-01), Ueyama et al.
patent: 2002/0080612 (2002-06-01), Ozawa et al.
patent: 2005/0128435 (2005-06-01), Yamauchi et al.
patent: A 02-230229 (1990-09-01), None
patent: 11-212023 (1999-08-01), None
patent: A 2000-162542 (2000-06-01), None
Oliff & Berridg,e PLC
Perkey W. B.
Seiko Epson Corporation
Sever Andrew
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