Polarizing lens constituted of aromatic polycarbonate
US9063276B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 9, 2011 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Jul 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1048
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a polarizing lens which is excellent especially in terms of impact resistance, appearance, and prevention of eye strain and which has high precision of the surface shape. The polarizing lens is formed by laminating a sheet of an aromatic polycarbonate through an adhesive layer to each surface of a film having polarizing properties, curving the resultant laminate so as to impart spherical or aspherical surfaces thereto to obtain a polarizing sheet, inserting the polarizing sheet into a mold, and injecting an aromatic polycarbonate, wherein the polarizing sheet is obtained through the laminating so that the stretch axis of one of the aromatic-polycarbonate sheets is perpendicular to the absorption axis of the film having the polarizing properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.