| abstract |
An optical film that uses a polylactic acid film, has good dimensional stability during heating, and can be suitably used as an optical film, particularly a retardation film, particularly an optical compensation film for a VA mode liquid crystal display. To provide a polylactic acid film. A crystal melting peak in a specific temperature range, a specific stereogenicity, a retardation in a plane direction (Re) and a retardation in a thickness direction (Rth) are in a specific numerical range, A polylactic acid film having a specific heat shrinkage rate. [Selection figure] None |