Patent ID: 8094544
Filing Date: 2012-01-10
Classification: G11B

Abstract:
1. An optical information recording medium from which an optical information recording medium reproducing device reproduces information by emitting a reproduction laser beam onto the optical information recording medium, said optical information recording medium compromising: a substrate on which content information is recorded by a plurality of recording marks forming protrusions and recesses and having different lengths including a length equal to or shorter than an optical system resolution limit of the optical information recording medium reproducing device, the plurality of recording marks being formed according to a predetermined modulation system, the optical information recording medium having test reading information stored therein, the test reading information being formed only with recording marks which form protrusions and recesses and each of which is longer than the optical system resolution limit of the optical information recording medium reproducing device, the test reading information including (i) a value of a test reading start power and (ii) a recommended scanning interval for a reproduction laser power, each of which is usable by the optical information recording medium reproducing device to perform a test reading in order to determine a reproduction laser power for reproducing the content information.