Patent ID: 6618214
Filing Date: 2003-09-09
Classification: G02B,H04N

Abstract:
A color wheel comprising:a substantially disc-shaped carrier having a central axis, a first principal surface, and a periphery, the carrier being rotatable around said central axis; and a substantially disc-shaped filter assembly having a first principal surface and having said central axis as its central axis, wherein a loop-shaped groove is formed at a predetermined distance from said periphery on the first principal surface of the said carrier, the first principal surface of said carrier includes a bonding zone inside of said loop-shaped groove, an adhesive is applied on the bonding zone to glue together the first principal surface of the substantially disc-shaped carrier and the first principal surface of the substantially disc-shaped filter assembly, a loop-shaped groove is formed around the carrier bonding zone or the filter bonding zone and is at a predetermined radial distance from the periphery so that an excessive portion, if any, of the adhesive can flow into said loop-shaped groove.