Industry Patents
Patent: 4894760
Additive Color-Mixing Light Fixture Employing a Single Moveable Multi-Filter Array
(Click image for PDF of full patent)
| Patent Number: |
4894760 |
| Title: |
Additive Color-Mixing Light Fixture Employing a Single Moveable Multi-Filter Array |
| Abstract: |
An improved color-mixing light fixture that produces a beam suitable for
entertainment lighting and varies the apparent color of the beam produced
by additively mixing varying proportions of light having two or more
different spectral energy distributions is disclosed. The disclosed
fixture employs a single light source and a single light beam that
provides at least one plane at which light energy passing through any
given point is evenly distributed across the beam where it reaches the
subject, and disposes a filter array having at least three filter segments
each having a different bandpass characteristic spaced around an effective
center in that plane. Rotation of the filter array about its effective
center adjusts the relative proportion of the colors produced by the
filter segments and displacement of it in that plane relative to the beam
adjusts the relative proportions of filtered and unfiltered light.
|
| Country of Issue: |
US |
| First Named Inventor: |
Callahan |
| Assignee: |
|
| Continuation or Divisional of: |
4797795 |
| International Classification: |
F21V 9/00 |
| US Classification: |
362/293 |
| Issue Date: |
01-16-1990 |
| Filing Date: |
09-28-1988 |
| Application : |
250316 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
4894760 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
4894760 at Google Patents |
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after the patent has issued - they take a while to get new patents in their systems.
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