Imaging system having a folded optical axis
US8717413B2 · kind B2 · utility
4Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2009 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jun 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging system having a folded optical axis that is accomplished through the effect of a first lens group, a prism, and a second lens group wherein a second surface of the prism is a mirror wherein the folded imaging system exhibits a horizontal field of view (HFOV) greater than 160 degrees and a vertical field of view (VFOV) greater than 80 degrees. Further aspects include a conjugate ratio of the lenses to be substantially 5.47 and a ratio of the entire lens focal length to the focal length of the first lens to be substantially −0.309.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.