Illuminator method and device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 1, 2010
Grant Date -
Feb 14, 2008
app pub date -
Aug 10, 2007
filing date -
Apr 18, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A first toroidal ray guide defines an axis of revolution and has a toroidal entrance pupil adapted to image light incident on the entrance pupil at an angle to the axis of revolution between 40 and 140 degrees, and it also has a first imaging surface opposite the entrance pupil. A second toroidal ray guide also defines the same axis of revolution and has a second imaging surface adjacent to the first imaging surface. Various additions and further qualities of the ray guides, which form optical channels, are disclosed. In a method light emanating from a source at between 40-140 degrees from an optical axis is received at an entrance pupil of a ray guide arrangement that is circularly symmetric about the optical axis. Then the received light is redirected through the ray guide arrangement to an exit pupil in an average direction substantially parallel to the optical axis.
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Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- F21V Class
- 1.22 % this patent is cited more than
- 15 Age
