Optical recording method and medium

摘要

When information is recorded in an optical recording medium having a recording layer by irradiating a laser beam thereto through an optical system, the recording is carried out under the conditions: »/NA ‰¤ 680 nm and n·Tw ‰¤ 22 ns wherein the laser beam has a wavelength », the optical system includes an objective lens having a numerical aperture NA, the window margin is Tw, and a signal length corresponding to the shortest recorded mark is n·Tw. The method provides for a high transfer rate and minimizes the jitter.