Method and apparatus for making polarized sunglasses
US9128302B2 · kind B2 · utility
0Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Mar 6, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the manufacture of gradient polarized sunglasses an optical retarder is used in front of a portion of a polarized lens to destroy the linear polarization of incoming light to render that portion of the sunglass lens non-polarized, thus to permit viewing of polarized displays through that non-polarized portion of the polarized sunglass lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.