Miniature telephoto lens assembly
US9568712B2 · kind B2 · utility
134Cited by
1References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2016 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Jun 1, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4913
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical lens assembly includes five lens elements and provides a TTL/EFL<1.0. In an embodiment, the focal length of the first lens element f1<TTL/2, an air gap between first and second lens elements is smaller than half the second lens element thickness, an air gap between the third and fourth lens elements is greater than TTL/5 and an air gap between the fourth and fifth lens elements is smaller than about 1.5 times the fifth lens element thickness. All lens elements may be aspheric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.