Photographic lens optical system
US8873164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Jan 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens optical system includes first, second, third, fourth, and fifth lenses that are arranged between an object and an image sensor where an image of the object is formed, in order from an object side, wherein the first lens has a positive (+) refractive power and an incident surface that is convex toward the object, the second lens has a negative (−) refractive power and a meniscus shape that is convex toward the object, the third lens has a positive (+) refractive power and both convex surfaces, the fourth lens has a positive (+) refractive power and a meniscus shape that is convex toward the image sensor, and the fifth lens has a negative (−) refractive power and an incident surface and an exit surface, at least one of the incident surface and the exit surface is an aspherical surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.