Imaging lens
US8711493B2 · kind B2 · utility
0Cited by
24References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 2013 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Feb 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A four element lens system for use with an imaging sensor includes first, second, third, and fourth lens elements and an optical filter that are arranged sequentially in order from an object side to an imaging side. The lens elements are coated with an anti-reflective film. The lens system further includes an optical filter that is disposed at a distance from the imaging sensor. The lens elements are relatively positioned to each other to satisfy specific conditions. The lens elements further include thickness to diameters ratios that satisfy specific conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.