Photographic lens
US6650485B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Aug 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact photographic lens for a digital camera is disclosed. The photographic lens has only two lens elements, yet provides excellent imaging even at the periphery of the image field. The photographic lens of the invention and an image sensor, together, fit within a volume of about 10 cm3. The lens is formed of, in order from the object side, a biconvex lens element having two aspherical surfaces, and a positive meniscus lens element having two aspherical surfaces. The convex surface of the meniscus lens element is positioned on the image side, and various conditions are satisfied in order to provide the photographic lens with a short overall length while favorably correcting various aberrations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.