Shaped gradient fabrication in lenses by molding from axial gradient
US5236486A · kind A · utility
28Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Oct 24, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2215/49
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Shaped gradient profiles of index of refraction in lenses are fabricated from axial gradients. While the resulting lens has both radial (or cylindrical) and axial components, and, strictly speaking, is not a pure radial (cylindrical) gradient, nonetheless, the presence of both the radial and axial components or cylindrical and axial components provides lens designers with greater flexibility in lens design than heretofore existed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.