To provide an optical element, an optical lowpass filter, and a solid-state imaging device of which quality and capability are hard to deteriorate even if they are continually subject to both of a high-temperature, high-humid environment and a normal environment. The multi-layer apparatus includes a tissue contact layer, a release layer, and a manifold layer. A cooling cavity is arranged on a back side of the yoke. If the fingerprint matches information stored for a media file, and the fingerprint meets at least one validity criterion, a copy of the media file can be associated with the user account even though the user’s copy cannot be read, or potentially even played, by a component of the environment. The presence of the tubular members and spacers minimizes movement of the radioactive source subsequent to deployment, so as not to alter dose distribution for subsequent irradiation. An analytics engine includes data intelligence coupled to the receipt processing and performs analysis of the receipt.