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 percent and having, and a value subtracting an average in-plane retardation value of the retardation film from the in-plane 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.
Hwaseung Industries Co. Ltd
Y Y B B B G B B
Y10T Y10T B29K B29K B29C G02B B29C B29C
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Young Joong Byung Woo Ki Sung Ju Han Ho Young
Kim Kim Ju Kim Lee