Projection optical apparatus

Details Projection optical apparatus Projection optical apparatus

2007-06-26

2007-06-26

Lavarias, Arnel (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S449000, C359S451000, C359S599000, C353S094000

Reexamination Certificate

active

10809510

ABSTRACT:
A projection optical apparatus is provided that is fast and of satisfactory illumination efficiency albeit being of simple construction and compact size including at least three projection optical systems for magnifying and projecting an image appearing on a display device, and further including a concave mirror for projecting exit pupils of the projection optical systems onto a viewer side and a diffusing plate comprising a transmission hologram, which is located near to images projected through the projection optical systems for magnifying the images of the exit pupils of the projection optical system upon projected by the concave mirror. The image of the exit pupil of each projection optical system projected by the concave mirror and magnified through the diffusing plate comprising a transmission hologram is projected in a mutually, at least partially overlapping fashion.

REFERENCES:
patent: 4799739 (1989-01-01), Newswanger
patent: 5757544 (1998-05-01), Tabata et al.
patent: 2003/0137731 (2003-07-01), Takahashi et al.
patent: 06-230738 (1994-08-01), None
patent: 10-115878 (1998-05-01), None
patent: 11-084291 (1999-03-01), None
patent: 2001-281583 (2001-10-01), None
patent: 2004301876 (2004-10-01), None

Affiliated with

Also associated with

Rating

Projection optical apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projection optical apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection optical apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3834344