Industry Patents
Patent: 7440205
Variable Intensity Dimmer
(Click image for PDF of full patent)
| Patent Number: |
7440205 |
| Title: |
Variable Intensity Dimmer |
| Abstract: |
A dimming system (300) for dimming electromagnetic radiation intensity of
a radiating unit, such as e.g., an optical system. The dimming system
(300) is adjusted to provide a constant electromagnetic radiation
intensity over the cross-section of the impinging electromagnetic
radiation beam by providing at least two dimming units (320, 330) each
having a spatially variable position-dependent dimming behavior, such
that the degree of dimming for the whole cross-section can be chosen to
be a fixed selectable dimming factor. The dimming units (320, 330) may be
based on spatially variable position-dependent dimming devices based on
transparent substrates having a coating with a position-dependent varying
transmission/reflection coefficient, on spatially variable
position-dependent diffusing devices or on polarizer devices.
|
| Country of Issue: |
US |
| First Named Inventor: |
Malfait, Defever |
| Assignee: |
Barco |
| Continuation or Divisional of: |
|
| International Classification: |
G02B 5/22 |
| US Classification: |
359/890 |
| Issue Date: |
10-21-2008 |
| Filing Date: |
09-14-2004 |
| Application : |
10/939492 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7440205 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7440205 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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