Optical system
US7764445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Aug 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system is mounted in a mobile communication terminal and a personal digital assistant (PDA) for a monitoring camera and a digital camera. The optical system includes: a first optical element formed in a meniscus shape entirely convex toward an object and having a positive refractive power; and a second optical element having an object-side surface convex toward the object and an image-side surface formed of a plane, wherein the second optical element includes: a fourth optical element having an object-side surface entirety convex toward the object on the optical axis; and a fifth optical element having an object-side surface in contact with an image-side surface of the fourth optical element, and an image-side surface and an object-side surface formed of planes respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.