Optical apparatus and method of manufacturing optical apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 10, 2003
Grant Date -
Aug 9, 2001
app pub date -
Sep 11, 1998
filing date -
Sep 12, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical apparatus uses an array of light-emitting elements (LEDs or ELs) and a focusing optical system. Light emitted from the light-emitting elements of the array is directed to the focusing optical system within narrowed solid angles, thereby raising overall light utilization efficiency, with the help of recesses, each shaped as an inverted conical frustum, centered at respective light-emitting elements, to collect light from the light-emitting elements and deliver it to the focusing system within narrower solid angles, as both direct light and indirect light reflected from the slanting side walls of the recesses. The side walls of the recesses can have a reflecting film to further enhance overall light utilization efficiency. Lenses can be formed integrally with the array, to further help focus the light delivered to the focusing optical system.
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