Industry Patents
Patent: 5825548
Cross-Fading Color Filter and System
(Click image for PDF of full patent)
| Patent Number: |
5825548 |
| Title: |
Cross-Fading Color Filter and System |
| Abstract: |
A color filter plate includes a continuously-variable dichroic filter
coating constituting a variable band-pass or variable band-reject filter
having a spatially-modulated variable-density pattern formed in the
coating, and provides continuously-variable hue and saturation
characteristics along separate gradient axes. A color filter assembly
includes a variable band-pass and a variable band-reject filter mounted in
a co-planar arrangement, providing a continuous range of color filtration
for spectral and non-spectral colors. A color filter mechanism includes a
color filter assembly having either a rectangular arrangement or a
circular arrangement of co-planar, continuously-variable band-pass and
band-reject filters mounted in a motorized carriage. One mechanism
provides two-axis translation of the rectangular color filter assembly
while another mechanism provides translation and rotation of the circular
color filter assembly. A light projection system comprising a lamp with a
reflector and a lens includes a color filter mechanism having co-planar,
continuously-variable band-pass and band-reject filters supported by a
motorized carriage mounted in a region where the beam diameter is small.
|
| Country of Issue: |
US |
| First Named Inventor: |
Bornhorst, Hutton |
| Assignee: |
Vari-Lite |
| Continuation or Divisional of: |
|
| International Classification: |
G02B 5/28 |
| US Classification: |
359/578 |
| Issue Date: |
10-20-1998 |
| Filing Date: |
09-11-1997 |
| Application : |
927917 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
5825548 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5825548 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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