Ophthalmic lens blocker
US5919080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1997 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An ophthalmic lens blocker for blocking a lens blank onto a support block without touching the block. The lens blocker has a lens blank imaging station for displaying a target image of a prescribed lens and a planar coordinate system associated with this target image. The imaging station has a stand for supporting the lens blank for orienting the lens blank according to references in the planar coordinate system. There is also provided a probing station for measuring a position and curvature of a surface of the lens blank and a lens/block moulding station having a cavity for receiving the support block in a known position and a bonding material dispenser for bonding the lens blank to the support block. The lens blocker further has a lens blank manipulator for moving the lens blank from the imaging station to the probing station and from the probing station to the lens/block moulding station. A central processor unit is also provided for controlling the operation of the lens blocker and for registering the spacial orientation of the lens blank, the spacial position and curvature of the surface of the lens blank, and for associating these coordinates to the known position of the supp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.