A method of manufacturing a color wheel with filter sectors. A resist film
formed on a disk-like substrate of the color wheel is shaped into a mask
pattern by photo processing, a metal mask which has openings configured
similar to the filter sectors but having a slightly larger area than
those is set on the substrate, and optical interference filters of a
dielectric multi-layer film are formed by an evaporation method or a
sputtering method, whereby the optical interference filters are formed so
as to cover very limited portions of the mask pattern so that at lift-off
process, resist remover can penetrate into the mask pattern from most
portions of the mask pattern thus enabling the mask pattern to be removed
easily and quickly.