Industry Patents
Patent: 5775799
Lighting Device Incorporating a Zoomable Beamspreader
(Click image for PDF of full patent)
| Patent Number: |
5775799 |
| Title: |
Lighting Device Incorporating a Zoomable Beamspreader |
| Abstract: |
A zoomable beamspreader is disclosed having two lenses arranged in closely
spaced, confronting relationship, with each lens incorporating an array of
alternating positive and negative lens segments. One of the two lenses is
controllably movable relative to the other, in a direction substantially
perpendicular to an optical axis, between a non-spread position, in which
the positive and negative lens segments of one lens are aligned with the
respective negative and positive lens segments of the other lens, and a
spread position, in which the positive and negative lens segments of one
lens are aligned with the respective positive and negative lens segments
of the other lens. The two lenses can take any of several alternative
forms, including a one-dimensional array of cylindrical lens segments, for
providing a zoomable beamspread along just one dimension, and a
two-dimensional array of spheric or aspheric lens segments, for providing
a zoomable beamspread along both dimensions.
|
| Country of Issue: |
US |
| First Named Inventor: |
Forkner |
| Assignee: |
Cunningham |
| Continuation or Divisional of: |
|
| International Classification: |
F21V 5/00 |
| US Classification: |
362/268 |
| Issue Date: |
07-07-1998 |
| Filing Date: |
03-26-1997 |
| Application : |
824264 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
5775799 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5775799 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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