OPTICAL MEMBER, IMAGING APPARATUS, AND MANUFACTURING METHOD OF OPTICAL MEMBER

摘要

PROBLEM TO BE SOLVED: To provide an optical member excellent in low reflectance characteristics and dust-proof characteristics.SOLUTION: An optical member comprises: a substrate 1; and a porous layer 20 having a plurality of holes disposed on the substrate 1. The porous layer 20 comprises a plurality of protrusion parts on a surface, width of the protrusion part is larger than a hole diameter of the hole of the porous layer 20, and distance between the plurality of protrusion parts is 75nm or more and 300nm or less.