Imaging lens
US7535660B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2007 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jul 31, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging lens is used for forming an image of an object on an image-taking surface of a solid state image sensor element and includes, in order from an object side to an image surface side, a diaphragm, a first lens which is a meniscus lens having a positive power whose convex surface faces the object side, and a second lens which is a meniscus lens having a positive power whose convex surface faces the image surface side, wherein a condition expressed by the following expression is to be satisfied: 1.45≦(r3+r4)/(r3−r4)≦3.4, where, r3: center radius curvature of the object side face of the second lens, and r4: center radius curvature of the image surface side face of the second lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.