Method of molding chalcogenide glass lenses
US5346523A · kind A · utility
15Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Mar 31, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/15
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An infrared transmitting chalcogenide glass lens having precision optical surfaces of different curvature radii is molded. A pair of molds having different curvature radiuses from each other, and a bushing which controls the thickness of the lens is provided. A block of chalcogenide glass is placed within the cavity. The upper mold, the lower mold and the block of glass are heated with the mold having a smaller curvature radius being at a higher temperature than the other mold. The glass is then pressed, cooled, and the resulting lens is removed from the mold assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.