Optical laminate with a mark, and method for manufacturing an optical laminate with a mark

Abstract

The present application provides an optical laminate with a mark, a manufacturing method thereof, and an inspection method of the optical laminate, which are less likely to cause reading errors at the time of reading the mark. The manufacturing method of the optical laminate with a mark includes a step of preparing an optical laminate (100) in which a plurality of optical films (11-17) are stacked, and a step of irradiating a laser beam (LB) to a surface of the optical laminate (100) perpendicular to a stacking direction of the optical films to impart a mark (M). The optical laminate (100) has, in a direction perpendicular to the stacking direction of the optical films, a region (A) having at least one interface having a cohesive force greater than 0 gf / 25 mm and less than 30 gf / 25 mm, and a region (B) having no interface having a cohesive force greater than 0 gf / 25 mm and less than 30 gf / 25 mm. In the step of irradiating the laser beam, the laser beam is irradiated to a surface of the region (B) perpendicular to the stacking direction of the optical films to impart the mark (M).

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