OPTICAL STORAGE MEDIUM, INFORMATION RECORDING DEVICE, AND INFORMATION RECORDING METHOD

摘要

An optical storage device capable of reducing interlayer crosstalk caused by a laser beam directed toward a servo layer (guide layer) is provided. An optical storage medium of an embodiment is equipped with: a cover layer; and a recording layer group which comprises multiple recording layers and multiple intermediate layer provided between the multiple recording layers. Sum (S1) of thickness (C1) of the cover layer and thickness (C2) of layers located between a first recording layer, which is closest to the cover layer, and a reflective recording layer, by which a laser beam passed through the cover layer is reflected first, does not match with sum (S2) of the thicknesses of one or more layers located between the reflective recording layer and a target recording layer.