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

摘要

PROBLEM TO BE SOLVED: To provide an optical storage medium and optical information device that can record or reproduce data with high reliability even when using an optical storage medium in which jitter from the shortest marks and spaces is worse than jitter from marks and spaces longer than the shortest marks and spaces.

SOLUTION: The optical information device has an optical pickup head that emits a light beam to the 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 outputted 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.

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