Method of making light polarizer
US4591512A · kind A · utility
23Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1985 |
| Grant date | May 27, 1986 |
| Priority date | — |
| Expiry date | Jan 25, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D3/12
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is described a method for making visible range dichroic polarizer material comprising a uniaxially stretched film of polyvinyl alcohol stained with iodine and treated with a borating solution containing a zinc salt. The method comprises the steps of staining a uniaxially stretched sheet of polyvinyl alcohol and further stretching the stained sheet while it is being treated with a borating solution containing a zinc salt. High efficiency visible range dichroic polarizer elements having good neutrality, very high extinction and high transmittance can be made according to the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.