Color wheel

Details Color wheel Color wheel

2007-08-23

2010-11-23

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Absorption filter

With support or frame

C359S885000, C359S889000, C353S084000

Reexamination Certificate

active

07839587

ABSTRACT:
A color wheel has one or a plurality of color filter segments made from a first material, typically glass, having a coefficient of thermal expansion that is substantially different from a carrier, which is made from a second material, typically aluminum. An intermediate washer or coating is disposed in between the segment(s) and the carrier, and has a coefficient of thermal expansion either equal to the segment(s) or in between that of the segment(s) and the carrier. The segment(s) is/are adhered to the washer or coating via a rigid or strong adhesive capable to withstand the strong centrifugal forces associated with rotating the color wheel and the filter segments at high speed.

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International Search Report dated Jul. 24, 2007 for application PCT/EP2007/006559.

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