Industry Patents
Patent: 6773120
Optical Projection System and Method for Using an Optical Projection System
(Click image for PDF of full patent)
| Patent Number: |
6773120 |
| Title: |
Optical Projection System and Method for Using an Optical Projection System |
| Abstract: |
Optical projection system, comprising a projection lens, illumination
optics in front of the projection lens showing a well-defined F# number,
and at least one light modulator comprising a plurality of reflective
elements, wherein this system shows an optical axis and wherein said
illumination optics allow to project light onto the light modulator and
said light modulator allows to reflect the light in a controllable manner
to different directions, such that ON state light cones, in which light is
projected onto the projection lens, as well as OFF state light cones can
be formed, wherein said projection lens shows an F# number which is
smaller than the F# number of said illumination optics, and wherein the
chief ray of the incident light at the light modulator is chosen such that
the direction of the chief rays of the obtained ON state light cones
differ from the corresponding optical axis, so as to obtain an improved
contrast.
|
| Country of Issue: |
US |
| First Named Inventor: |
Colpaert |
| Assignee: |
Barco |
| Continuation or Divisional of: |
|
| International Classification: |
G03B 21/14 |
| US Classification: |
353/122 |
| Issue Date: |
08-10-2004 |
| Filing Date: |
09-23-2003 |
| Application : |
10/667591 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
6773120 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6773120 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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