Industry Patents
Patent: 7712924
Optical Device for Adjusting the F-Number of an Elliptical Lamp
(Click image for PDF of full patent)
| Patent Number: |
7712924 |
| Title: |
Optical Device for Adjusting the F-Number of an Elliptical Lamp |
| Abstract: |
An optical device for effectively adjusting the F-number of an elliptical
lamp is provided, the elliptical lamp for producing a focused light beam
at a given focal point having a given cone angle. The optical device
comprises a light interaction portion for optically interacting with the
focused light beam when the light interaction portion is in general
longitudinal alignment with a light emitting aperture of the elliptical
lamp, the light interaction portion for triggering optical adjustment of
a cone angle of at least a high cone angle portion of the focused light
beam to a smaller cone angle. The optical device further comprises a
light egress portion, coupled to the light interaction portion, for
enabling exit of the focused light beam from the optical device with an
effective cone angle smaller than the given cone angle, after the cone
angle of the at least the high cone angle portion of the focused light
beam has been adjusted to the smaller cone angle.
|
| Country of Issue: |
US |
| First Named Inventor: |
Ma |
| Assignee: |
Christie Digital Systems |
| Continuation or Divisional of: |
|
| International Classification: |
F21V 19/02 |
| US Classification: |
362/285 |
| Issue Date: |
05-11-2010 |
| Filing Date: |
12-26-2007 |
| Application : |
12/003492 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7712924 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7712924 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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