Optical layered body and production method therefor

The present invention provides an optical layered body. The optical layered body comprises in order: a protective film, a polarizing plate, one or more retardation layers, and an adhesive layer, wherein the protective film satisfies the following formula: first elastic modulus-second elastic modulus>=300MPa. In the formula, the first elastic modulus is a tensile elastic modulus in a direction orthogonal to the absorption axis of the polarizing plate at a temperature of 23 DEG C and a relative humidity of 55% RH, and the so-called second elastic modulus is The tensile elastic modulus in a direction parallel to the absorption axis of the polarizing plate at a temperature of 23 DEG C and a relative humidity of 55% RH. 本发明提供一种光学层叠体，其依次包含保护膜、偏振板、一层以上的相位差层、以及粘合剂层，保护膜满足下式：第一弹性模量－第二弹性模量≥300MPa。式中，所谓第一弹性模量，是在温度23℃、相对湿度55％RH下的与偏振板的吸收轴正交的方向上的拉伸弹性模量，所谓第二弹性模量，是在温度23℃、相对湿度55％RH下的与偏振板的吸收轴平行的方向上的拉伸弹性模量。