Lens meter
US6657710B2 · kind B2 · utility
12Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Aug 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/0235
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A lens meter capable of easily measuring optical characteristics of far and near viewing sections of a multifocal lens to obtain optical characteristics of a multifocal lens. The lens meter comprises a first measurement optical system having a first measurement optical axis, for measuring optical characteristics of a far viewing section of a multifocal lens, and a second measurement optical system having a second measurement optical axis which is different from the first measurement optical axis, for measuring optical characteristics of a near viewing section of the multifocal lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.