Light source and projector

Details Light source and projector Light source and projector

2011-06-07

2011-06-07

Dowling, William C (Department: 2878)

Optics: image projectors

Reflector

Plural

C362S297000

Reexamination Certificate

active

07954963

ABSTRACT:
A light source device includes a discharge lamp and a reflection mirror having a plurality of concave curved surfaces. Each of the plurality of concave curved surfaces is an ellipsoidal surface. A first focal point of each of the ellipsoidal surfaces is disposed at the light emitting center of the discharge lamp. A second focal point of each of the ellipsoidal surfaces is disposed, when viewed from a predetermined first direction perpendicular to a system optical axis passing through the light emitting center, on the opposite side of the system optical axis to the ellipsoidal surface, and when viewed from a second direction perpendicular to the system optical axis and the first direction, on the side where the ellipsoidal surface is present with reference to the system optical axis.

REFERENCES:
patent: 5532763 (1996-07-01), Janssen et al.
patent: 2007/0053190 (2007-03-01), Janssen
patent: 2007/0058372 (2007-03-01), Sacre et al.
patent: A 07-219046 (1995-08-01), None
patent: A 09-222580 (1997-08-01), None
patent: A 10-050120 (1998-02-01), None
patent: A 2000-133024 (2000-05-01), None
patent: A 2001-242545 (2001-09-01), None

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