Optical element and optical system including the optical element

Patent metadata

Field	Value
Publication number	US-8934183-B2
Application number	US-61476009-A
Country	US
Kind code	B2
Filing date	Nov 9, 2009
Priority date	Nov 12, 2008
Publication date	Jan 13, 2015
Grant date	Jan 13, 2015

Abstract

An optical element is provided, which is small in distortion when at least three optical members including a resin layer sandwiched by the optical members are cemented together, has a high environmental resistance and optical performance, and has an excellent chromatic aberration correction effect. In the optical element, the resin layer is formed on one of light incident/exit surfaces of a first optical member, and a second optical member is cemented to the resin layer by a bonding material. A condition of φg<φr is satisfied where φr indicates an outer diameter of the resin layer and φg indicates an effective region diameter of a surface of the second optical member which is cemented to the resin layer.

First claim

What is claimed is:

1. An optical element comprising:
a first optical member;
a resin layer formed on the first optical member;
a second optical member having a surface cemented to the resin layer; and
a bonding material cementing the second optical member to the resin layer,
wherein the resin layer has a positive optical power and a meniscus shape, and
wherein the following condition is satisfied:
φ g<φr,

where φr indicates an outer diameter of the resin layer…

Assignees

• Maetaki Satoshi
• Canon Kk

Inventors

• Maetaki Satoshi

Classifications

• G02B13/22

  Physics · mapped topic

• G02B1/12 Primary

  Physics · mapped topic

• G02B13/0045

  Physics · mapped topic

• G02B13/009

  Physics · mapped topic

• G02B13/006

  Physics · mapped topic