Patent ID: 8134905
Filing Date: 2012-03-13
Classification: G11B

Abstract:
1. An information memory apparatus comprising: an illumination unit including a light source; a memory unit including a memory medium, the memory medium having a memory area, a plurality of memory cells being arranged in the memory area, each of the memory cells storing data using a difference in transmissivity for light rays irradiated from the illumination unit or a difference caused in light emission characteristics when light rays irradiated from the illumination unit have been received; a reading unit having an imaging device to take an image of light rays incident via the memory medium; and a computation unit for analyzing data obtained by taking an image in the reading unit, wherein light rays irradiated from the illumination unit has a width covering the memory area in the memory medium in a direction of a third axis perpendicular to a first axis coupling the illumination unit and the reading unit and a rotation axis of the memory medium.