Patent ID: 6839180

Claim:
A combiner manufacturing method comprising the steps of: masking a polarizer plate with a mask having a first masking section and a second masking section, the first masking section having an opening slightly smaller than the polarizer plate, the second masking section having a masking pattern-which is constituted by a plurality of circles or stripes that are spaced from each other such that a masking ratio of the masking pattern becomes gradually smaller inwardly from an inner periphery of the opening of the first masking section, sequentially layering an undercoat layer, a reflecting coat layer, an overcoat layer, and a top coat layer on the polarizer plate through coating processes to define a polarizing and reflecting member, arranging the polarizing and reflecting member as an insert at a predetermined position in a cavity of a molding die for forming the combiner, injecting a molten thermoplastic resin base material in the molding die before cooling the base material for solidification, and, and removing the mask and providing a gradation print layer on a portion of the polarizer plate which has been covered by the mask in the masking step.