A stereoscopic image converting apparatus is capable of displaying a stereoscopic image. The thermal bridge extends between the two ends and switches reversibly between conductive and non-conductive states. 5 m in terms of 10-point average roughness Rz, has a minimum distance between peaks of a base foil peak of at least 5 m, has an ordinary temperature tensile strength of not more than 40 kgmm2, and has a drop in ordinary temperature tensile strength after heat treatment at 130 C. The physical access control device is configured to authenticate the plurality of unique identifiers in the encryption message and operate an access control mechanism.