Industry Patents
Patent: 7443588
Optical Diffuser for Producing a Circular Light Field
(Click image for PDF of full patent)
| Patent Number: |
7443588 |
| Title: |
Optical Diffuser for Producing a Circular Light Field |
| Abstract: |
The optical diffuser has a transparent base body with a first 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 Archimedian 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 a regular hexagonal edge
contour, 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 the regular hexagonal
edge contour, 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: |
|
| International Classification: |
G02B 13/20 |
| US Classification: |
359/599 |
| Issue Date: |
10-28-2008 |
| Filing Date: |
09-16-2004 |
| Application : |
10/943120 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7443588 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7443588 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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