High-density read-only optical disk

Abstract

A high-density read-only optical disk. In the optical disk, plural grooves continuously forms a waveform manner along each track, providing plural information pits to the grooves and making possible to reproduce the information from the track pits which are narrower than the track pits of the optical disk having only information pits for every track.

Description

technical field [0001] The present invention relates to an optical disc system for recording digital audio and video data in the form of pits on an optical disc and reading the data with a laser beam, in particular, to a substrate having a surface structure for increasing data recording density CD-ROM. Background technique [0002] In optical recording and reading technology, data is read from an optical disc by using a laser beam according to the difference in intensity of reflected light. The intensity of the reflected light is variable, that is, the recording of data on the disc, in the case of a general CD (Compact Disc) or DVD (Digital Video Disc), is done by utilizing the optical interference between the pit and the reference plane In the case of magneto-optical disks, this recording is accomplished by changing the deflection direction of the magneto-optical recording material; in the case of phase-change optical disks, it is accomplished by the difference in the inte...

AI Technical Summary

Problems solved by technology

Therefore, data recorded on high-capacity optical discs with a p value of 0.6 or 0.5 μm cannot be tracked with first-generation DVD players having predetermined λ and NA values

[0010] Even though tracking is possible, data is read from adjacent tracks, which introduces noise and data reading errors known as crosstalk

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