Abstract: A system is provided. The system includes an information storage medium including a substrate and a plurality of pit trains formed on the substrate at a track pitch between 0.64 and 0.67 micrometers. The system further includes a pickup head having a numerical aperture of around 0.6 and a wavelength of around 650 nanometers. The system has a tangential tilt margin between 0.54 and 0.68 degrees, and a radial tilt margin between 0.68 and 0.83 degrees when a jitter of the system is about 10%.

Abstract: A high-density information storage medium has a shorter length of information bits and a smaller pitch of track. The storage capacity is increased by shortening the track pitch and data bit length and increasing the storage density. The medium of the invention can be made by current CD manufacturing facilities, and can be read through general DVD devices.