Patent ID: 7333278
Filing Date: 2008-02-19
Classification: G02B,G09G,Y10S

Abstract:
1. A method for manufacturing a color wheel which comprises a disk-like substrate made of a light-transmittable material, and plural kinds of filter sectors formed on the substrate and functioning either to selectively transmit or to selectively reflect lights having respective different wavelength bands, the method comprising the steps of: forming, on the substrate, a mask pattern to demarcate predetermined filter sectors of a kind functioning to either transmit or reflect light having a specific wavelength band; setting, over the substrate having the mask pattern formed thereon, a masking jig which has openings dimensioned slightly larger than the predetermined filter sectors; forming, on the substrate with the masking jig set thereon, predetermined filters to constitute the predetermined filter sectors; taking off the masking jig from the substrate having the predetermined filters formed thereon; and removing the mask pattern from the substrate with the masking jig taken off therefrom.