Deep pressing mold and process for molded optical elements
US4797144A · kind A · utility
24Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Jul 20, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2215/72
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for molding precision optical quality glass elements having complex and concave surfaces requires the apportionment of relative movement between two opposing mold surfaces. First and second molds are contained within a floating alignment sleeve, thereby defining a mold cavity within which an essentially arbitrarily-shaped glass preform is placed. The first mold is moved in the alignment sleeve until stopped by a calibrated standoff. Thereafter, pressing is continued with the second mold moving in the alignment sleeve until opposing surfaces are completely formed at substantially the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.