Color wheel (optics)
![](../I/m/Color_wheel_1895.png)
An 1895 mechanical color wheel, used for experiments with color vision.
A mechanical four-petal RGBW color wheel inside a 1998 DLP video projector.
For the "planar circular chart" with a spectrum of colors, see colour wheel.
A color wheel or other switch for changing a projected hue (e.g., for an optical display) is a device that uses different optics filters within a light beam. Common usage includes continuously-rotating wheels for seasonal home displays (e.g., at Christmas) and controllable color wheels for a particular instrument (e.g., SeaChanger Color Engine for stage lighting), while non-wheel devices include scrollers and semaphore types with lever arms (e.g., on the 1897-1917 Grand Army Plaza fountain).
![](../I/m/The_Childrens_Museum_of_Indianapolis_-_Color_wheel.jpg)
A color wheel lamp, c. 1960, utilized for decorative purposes, in the collection of The Children's Museum of Indianapolis.
This article is issued from Wikipedia - version of the 11/11/2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.