Method for grinding and polishing lenses on same machine
US4733502A · kind A · utility
42Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Sep 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S451/921
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The method of both the surface grinding, or fining, and the polishing of a lens are accomplished on the same surfacing machine spindle, precisely reproducing the curvature and alignment from fining to polishing, thereby resulting in improved surface quality and optical properties. The fine grinding and polishing are accomplished using plain water by sequentially securing to and releasing from the lap, via a high shear-low peel strength adhesive, (a) a fixed abrasive fining pad, and then (b) a polishing pad consisting of a water soluble matrix containing the polishing particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.