Patent ID: 11971520
Assignee: CANON KABUSHIKI KAISHA
Field: Surface technology, coating (Chemistry)
Classification: CPC G  C | IPC C  G

Claim 11:
12. The optical device manufacturing method according to claim 8, wherein the surface of the base member on which the oxide-containing layer is formed, is formed by a step of alternately stacking, on a substrate, first oxide layers and second oxide layer,
the first oxide layers contain silicon oxide or aluminum oxide and/or having a refractive index of 1.35 or more and less than 1.75, and
the second oxide layers contain a member selected from the group consisting of zirconium oxide, tantalum oxide, niobium oxide and titanium oxide and/or having a refractive index of 1.75 or more and 2.70 or less.