Plastic lens
US5995304A · kind A · utility
17Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jun 5, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A plastic lens has a flange provided with a reflecting plane, so that its inclination upon assembling can be detected and adjusted efficiently and accurately. This plastic lens has the flange at an outer periphery of an optically functioning portion. A surface of the flange surrounding the optically functioning portion is a reflecting plane perpendicular to an optical axis of the optically functioning portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.