Projection apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 10, 1996
Grant Date -
N/A
app pub date -
Apr 3, 1995
filing date -
May 10, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A projection apparatus includes a light source having a light emitting portion having a finite size, a concave reflecting mirror for condensing light from the light source, a condenser lens unit for converting the beam of light from the concave reflecting mirror into a substantially collimated beam of light, a light valve for reflecting the beam of light from the condenser lens unit and spatially modulating the beam of light on the basis of predetermined image information, and a projection optical system for imaging the spatially modulated beam of light on a predetermined surface, a lens unit for condensing the beam of light from the light valve in the inside off-illumination area of the beam of light formed by the concave reflecting mirror and the condenser lens unit being disposed between the light valve and the projection optical system, a light dividing element for directing the beam of light from the condenser lens unit to the light valve and for directing the beam of light condensed by the lens unit to the projection optical system being disposed between the condenser lens unit and the light valve.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully