| 20090312514 | RETARDATION FILM HAVING UNIFORM IN-PLANE PHASE-DIFFERENCE VALUE AND LAMINATED OPTICAL FILM HAVING POSITIVE DISPERSIBILITY IN WAVELENGTH - The present invention relates to a retardation film having a zero wavelength dispersibility and a uniform retardation, and an optical laminated film having a positive wavelength dispersibility. Here, in the retardation film, a homo polypropylene resin has an isotactic index more than 85 percents and having, and a value subtracting an average in-plain retardation value of the retardation film from the in-plain retardation value at the retardation film is in a range of ±5 nm. In the optical laminated film, another retardation film having a negative wavelength dispersibility is laminated on the above retardation film having a zero wavelength dispersibility. | 12-17-2009 |
