Color wheel (optics)
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Color_wheel_1895.png/220px-Color_wheel_1895.png)
An 1895 mechanical color wheel, used for experiments with color vision.
A mechanical four-petal (red, green, blue, white) color wheel inside a 1998 Digital Light Processing (DLP) video projector.
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).
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/43/The_Childrens_Museum_of_Indianapolis_-_Color_wheel.jpg/220px-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.
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Media related to Color wheel (optics) at Wikimedia Commons
Categories:
- Optics stubs
- Mechanisms (engineering)
- Optical filters