Lens and production method therefor
US6529339B2 · kind B2 · utility
2Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Aug 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens made of at least one of a resin and glass includes a lens effective diameter area, a peripheral area formed integral with the lens effective diameter area and located at a periphery of the lens effective diameter area, and at least one marker area located in the peripheral area and formed on a circle whose center is a center of the lens effective diameter area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.