Method and apparatus for forming sunglass lenses with a predetermined gradient
US9372353B2 · kind B2 · utility
3Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2014 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Oct 17, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2009/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for forming sunglass lenses with a predetermined optical gradient, namely a polarized gradient, transmissivity gradient or color gradient in which an ink jet printer is used to print a gradient pattern on an oriented sheet, with the ink jet printer being provided with a dye, in one embodiment a dichroic dye and in another embodiment an iodine dye. The printed oriented sheet is incorporated into a lens to provide the lens with the associated gradient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.