Optical Device, Imaging Device And Manufacturing Method Of Imaging Device
OwnerKenichiro Hiratainventor
Life of this patent
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Abstract
Provided is an optical device and the like which can suppress a decrease in optical performance even under high-temperature heating environments, such as a ref low process. Since at least one of compound lenses 10 and 110 made of heat-resistant resin includes an antireflection structure 51 as a fine asperity structure layer on an inside surface facing a space, even if a subsequent heat treatment is performed, a decrease in optical performance of the lens due to wrinkling can be prevented unlike a case in which an antireflection film is provided. The antireflection structure 51 is covered, for example, by a thin protective layer 52.
Claims18
An optical device, comprising:
- a lens;
- an optical member which faces the lens via a space;
- and
- a sealing member which airtightly seals the space disposed between the lens and the optical member,
- wherein the lens is made of heat-resistant resin and has a fine asperity structure layer which is an antireflection layer on an inside surface facing the space, the asperity structure layer being made of substantially the same material as that of a base of the lens and the asperity structure layer and the base of the lens being formed integrally.
A manufacturing method of an imaging device which includes a lens and an optical member which faces the lens via a space, the method comprising:
- a process to form a fine asperity structure layer which is an antireflection layer made of heat-resistant resin on an inside surface of the lens to face the space;
- a process to fix the lens and the optical member while airtightly sealing the space disposed between the lens and the optical member by a sealing member;
- and
- a process to heat-treat the fixed lens and the optical member.
Dependencies are inferred from the claim text.