Goggles' lenses
US5094520A · kind A · utility
26Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1991 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Feb 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An axiosymmetric eccentric spherical polycarbonate lens (2) for goggles (1), comprising inner (7) and outer (8) spherical surfaces defined by centers of curvature 0.sub.1 and 0.sub.2 and by radii R.sub.1 and R.sub.2, respectively, 0.sub.1 and 0.sub.2 being both located on the lens's axis of symmetry (5), at a distance D from each other, the lens being more distal from 0.sub.1 than from 0.sub.2, the length of R.sub.2 being about 1.025-1.035 R.sub.1, and that of D about 0.0510-0.0564.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.