Patent ID: 11960079
Assignee: ASAHI KASEL KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 20:
21. A method of manufacturing a wire grid polarizing plate having a fine metal wire region, comprising:
a fine metal wire forming step of forming a plurality of fine metal wires extending in a predetermined direction on a substrate to form the fine metal wire region; and
a step of forming a plurality of different fine metal wires that are directly adjacent to each other, each having a structure different from that of peripheral fine metal wires on the substrate to be included in the fine metal wire region at a same time as, or at a different step from, the fine metal wire forming step, so that the plurality of different fine metal wires are formed within the fine metal wire region and provide Han an abnormal structure region for emitting diffracted light in reflection observation, wherein the diffracted light is a line that corresponds to a polarizing direction of the surface having the fine metal wire region.