OPTICAL MEMBER, IMAGE PICKUP APPARATUS, AND METHOD FOR MANUFACTURING OPTICAL MEMBER

摘要

To provide an optical member having a porous glass layer on a substrate and rarely causing ripples.;The optical member has a porous glass layer on a substrate. The porous glass layer includes a first porous glass layer and a second porous glass layer in this order on the substrate. The first porous glass layer has a uniform porosity. The second porous glass layer has a higher uniform porosity than the first porous glass layer.

主权项

1. An optical member, comprising: a substrate; and a porous glass layer disposed on the substrate,
wherein the porous glass layer includes a first porous glass layer and a second porous glass layer in order on the substrate, the first porous glass layer comprising a region having a uniform porosity, the second porous glass layer comprising a region having a higher uniform porosity than the first porous glass layer.