Universal lens polishing tool, polishing apparatus and method of polishing
US4768308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1986 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Dec 17, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/043
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A universal polishing tool comprises a rigid cup having a circular rim to which is attached a relatively thin resilient polishing pad. In accordance with a method for using the tool, the tool is rotated about the axis of a support shaft causing the resilient polishing pad to move with respect to the surface which is being polished. The universal polishing tool is dynamically positioned as a function of time with respect to the surface being polished. The orientation and position as a function of time are determined by a control algorithm according to the geometry of the tool and the particular surface being polished and are controlled by means of a controllable positioning device. In the case of a spherical surface or a rotationally symmetric aspheric surface, the lens is rotated about its axis of symmetry during the polishing operation. In the case of a toric surface, the lens is oscillated about an axis which is normal to its center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.