Cellulose acetate film having controlled retardation and thickness
US7019130B2 · kind B2 · utility
13Cited by
2References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2001 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133634
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cellulose acetate film is made of a cellulose acetate having an acetic acid content of 59.0 to 61.5%. The film is controlled to have a Re retardation value in the range of 0 to 20 nm, a Rth retardation value in the range of 30 to 70 nm, and a thickness in the range of 10 to 70 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.