Method and device for manufacturing optical elements
US5718850A · kind A · utility
10Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1995 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Oct 24, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Optical material, which was already roughly molded, is deposited into a space defined by a top mold, a bottom mold and a drum mold, and is then heated, pressed and molded, thus providing an optical element. By controlling the rate of plastic deformation of the optical material so as to prevent the material from entering clearance sections between the outside diameter of the top mold or of the bottom mold and the inside diameter of the drum mold, an optical element of high precision with no burr nor strain is provided at low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.