Apparatus for making an aspherical lens and a method of making an aspherical lens
US5195407A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Jul 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2502
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for forming aspherical lenses is provided in which a holder holds and rotates a predetermined lens workpiece, with a rotation detecting device provided for detecting the rotation angle of the workpiece. The cutting bit is mounted to swing about an axis perpendicular to the axis of rotation of the workpiece holder, with the cutting bit holder also linearly reciprocated. The swing angle and linear extent of the cutting bit or cutting bit holder are also detected, such that the swinging and reciprocating movement can be coordinated and controlled. The method and apparatus is particularly advantageous in forming aspherical and irregular lens shapes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.