OPTICAL INFORMATION DEVICE, OPTICLA STORAGE MEDIUM, OPTICAL STORAGE MEDIUM INSPECTION DEVICE, AND OPTICAL STORAGE INSPECTION METHOD

摘要

ABSTRACT OPTICAL INFORMATION DEVICE, OPTICAL STORAGE MEDIUM, OPTICAL STORAGE MEDIUM INSPECTION DEVICE, AND OPTICAL STORAGE INSPECTION METHOD This optical disc drive has an optical pickup head that emits a light beam to an optical storage medium, detects the light beam reflected from the optical storage medium, and outputs a signal based on the received reflected light; a jitter measuring unit for measuring jitter in signals output from the optical pickup head; and an evaluation unit for determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more. Figure 4.