OPTICAL LAMINATE, POLARIZATION PLATE, AND IMAGE DISPLAY DEVICE

摘要

Provided is an optical laminate which can reduce the occurrence of curling, and exhibits excellent workability when being affixed to a polarizer or a display panel. This optical laminate comprises a hard coating layer on one surface of a triacetylcellulose substrate and is characterised in that when the Martens hardness (N1) of the surface of the hard coating layer, the Martens hardness (N2) of the cross-sectional centre of the hard coating layer, and the Martens hardness (N3) of the centre of the cross section of the triacetylcellulose substrate are each measured by a nanoindentation method with an applied load of 10mN, Martens hardness (N1) is 200-450N/mm2, Martens hardness (N2) is 100-300N/mm2, and Martens hardness (N3) is 150-250N/mm2.