Lens system installed in mobile communication terminal
US6844989B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2004 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Jan 21, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a lens system installed in a mobile communication terminal, comprising: a first lens including at least one aspherical plane and having a positive refractivity; a perforated iris separated from the first lens by a designated distance for preventing unnecessary incident light from being incident onto an optical system; a second lens separated from the perforated iris by a designated distance, including at least one aspherical plane and having a positive refractivity; and a third lens separated from the second lens by a designated distance, including at least one aspherical plane and having a negative refractivity, wherein the first lens, the perforated iris, the second lens and the third lens are arranged sequentially from a subject, and the perforated iris is located between the first lens and the second lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.