| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical film presenting flat wavelength dispersion and a large negative retardation when the film is stretched and oriented.SOLUTION: The optical film contains a polymer having a repeating unit expressed by formula (1). In the formula, Rand Reach independently represent a hydrogen atom or an organic residue having 1 to 20 carbon atoms, in which the organic residue may include an oxygen atom. |
