Recording-medium driving device

A recording-medium driving device comprising a cylindrical recording medium and a pickup opposing the recording medium,

• wherein the recording medium includes an outer cylindrical member having optical transparency and positioned at an outer peripheral surface, an inner cylindrical member positioned at an inner peripheral surface, and an optical recording material layer, with which a portion between the outer cylindrical member and the inner cylindrical member is filled, and wherein an interference pattern, formed as a result of light interference, is recorded as data in an internal portion of the optical recording material layer,
• wherein the optical pickup opposes the outer peripheral surface of the recording medium, and the optical pickup includes a light source, a light-converging lens that applies light, emitted from the light source, as reference light to the optical recording material layer, and an image pickup member that reads reproduction light reflected from the recording medium towards an outer side of the outer peripheral surface and diffracted at the interference pattern.

A recording-medium driving device comprising a cylindrical recording medium and a pickup opposing the recording medium,

• wherein the recording medium includes an outer cylindrical member positioned at an outer peripheral surface, an inner cylindrical member having optical transparency and positioned at an inner peripheral surface, and an optical recording material layer, with which a portion between the outer cylindrical member and the inner cylindrical member is filled, and wherein an interference pattern, formed as a result of light interference, is recorded as data in an internal portion of the optical recording material layer,
• wherein the optical pickup opposes the inner peripheral surface of the recording medium, and the optical pickup includes a light source, a light-converging lens that applies light, emitted from the light source, as reference light to the optical recording material layer, and an image pickup member that reads reproduction light reflected from the recording medium towards an inner side of the inner peripheral surface and diffracted at the interference pattern.