OPTICAL FILM, POLARIZING PLATE PROTECTION FILM, POLARIZING PLATE INCLUDING THESE FILMS, AND DISPLAY DEVICE INCLUDING THESE FILMS

摘要

The present invention provides a means which enables the achievement of good crack resistance, and durability and adhesiveness under a high-temperature and high-humidity environment of a cyclic polyolefin film for optics application. The present invention relates to an optical film comprising a cyclic polyolefin film and a stress relaxation layer disposed on the cyclic polyolefin film, wherein the stress relaxation film contains Si atoms, O atoms and C atoms, and an average value X_AVE in a thickness direction of a ratio X(%) of a C-C bond to the sum total of peak intensities resulting from C-C, C-SiO, C-O, C=O and C(=O)-O bonds at each measurement position found from a depth profile of a C1s spectral region measured by X-ray photoelectron spectroscopy of the stress relaxation layer is 1-40% inclusive.