Illumination system for ophthalmic lens inspection
US5812254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/0207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for providing diffuse illumination in the inspection of ophthalmic lenses for use in conjunction with a computer-based lens inspection apparatus. Below a package containing an ophthalmic lens in deionized water is an optical diffuser made of flashed opal and below that a light source such as a strobe light. The strobe lamp firing is initiated by the image processing system which is in turn triggered by a signal generated by the arrival of a package containing a lens to be inspected. In the preferrerd embodiment, an arc tube is employed wherein light output diminishes by darkening only in one end of the tube, that end placed outside the reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.