Colored low-polarizing films, colored low-polarizing sheets, and colored low-polarizing lenses, and methods thereof
US9784895B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jan 21, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2029/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A colored low-polarizing film of a desired color is produced by causing a polyvinyl alcohol film to swell with water, stretching, dyeing with an organic dichroic dye, and drying it; a polarizing sheet including the film and transparent sheets attached to both sides of the film by an adhesive; and an injection-molded polarizing lens obtained by causing the sheet to curve to impart spherical or aspherical surfaces to obtain a curved polarizing lens and injecting a transparent resin onto the concave surface of the lens. The dye includes a dichroic organic dye and a coloration organic dye, wherein the dichroic composition includes a combination of dichroic dyes having a dichroic ratio of 13 or higher, wherein the coloration dye composition includes a combination of dyes having an extremely low dichroic ratio, of 4 or less, or substantially having no dichroic ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.