Industry Patents
Patent: 7729054
Optical Diffuser for Producing a Circular Light Field
(Click image for PDF of full patent)
| Patent Number: |
7729054 |
| Title: |
Optical Diffuser for Producing a Circular Light Field |
| Abstract: |
The optical diffuser has a transparent base body with a base body surface,
which is divided into facets. Each facet has an elevation or a depression
correlated or associated with a second curved surface. Respective facets
have correspondingly different geometrical shapes. In some embodiments
the respective apexes (S) of the elevations or depressions are arranged
along a spiral, especially an Archimedean spiral. In other embodiments
the apexes (S) are defined by coordinates (x.sub.s', y.sub.s') derived by
rotation of coordinates (x.sub.p, y.sub.p) of all points (P), which are
defined by an arrangement of facets with regular hexagonal edge contours,
about a center (0, 0) through a twist angle (.delta.). Alternatively the
apexes (S) are defined by coordinates (x.sub.s'', y.sub.s'') derived from
coordinates (x.sub.p, y.sub.p) of all points (P), which are defined by
the arrangement of facets with regular hexagonal edge contours, by random
variations with the help of a Monte Carlo method. The optical diffuser
according to the invention produces a circular soft-edged light field,
which is outstanding for photographic applications.
|
| Country of Issue: |
US |
| First Named Inventor: |
Becker, Kittelamnn, Kurek, Wagener, Zirfas |
| Assignee: |
Schott |
| Continuation or Divisional of: |
7443588 |
| International Classification: |
G02B 13/20 |
| US Classification: |
359/599 |
| Issue Date: |
06-01-2010 |
| Filing Date: |
09-19-2008 |
| Application : |
12/233851 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
7729054 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7729054 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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