Recording medium, optical disk apparatus and method of information recording

An optical disk apparatus for recording data from an optical disk where lands and grooves are formed alternately, said apparatus comprising

• an irradiator means for irradiating a first light beam spot to a target track on the optical disk where the grooves, which are wobbled on the basis of address information, and non-wobbled DC grooves are formed alternately while each of the lands is interposed therebetween, and one of the group consisting of the lands and the grooves constitutes data recording tracks, said irradiator means further irradiating second and third light beam spots to the diametrical two sides of the first light beam spot;
• a light beam receiver means for receiving the reflections of said first, second and third light beam spots from said optical disk, to thereby obtain first, second and third signals;
• and
• a calculator means for calculating an address signal on the basis of said second and third signals.

An optical disk apparatus for recording data from an optical disk where lands and grooves are formed alternately, said apparatus comprising:

• an irradiator means for irradiating a light beam spot to a target track on the optical disk where the grooves wobbled on the basis of address information and the non-wobbled DC grooves are formed alternately while the lands are interposed therebetween, and one form the group consisting of the lands and the grooves constitutes data recording tracks;
• a light beam receiver means for receiving the reflection of said light beam spot from said optical disk;
• and
• a calculator means for calculating, on the basis of the output of said light beam receiver means, the address of the position where data are recorded.

A method of reproducing information from an optical recording medium using an optical disk apparatus having wobbled and non-wobbled DC grooves arranged alternately, each pair of grooves having a land interposed therebetween, comprising the steps of:

• irradiating a target track on the optical disk with a first light beam spot;
• irradiating two diametrical sides of the first light beam spot with a second and a third light beam spots;
• receiving the reflections of said first, second and third light beam spots from said optical disk, to thereby obtain first, second and third signals;
• and
• calculating an address signal on the basis of said second and third signals.

A method of reproducing information from an optical recording medium using an optical disk apparatus having wobbled and non-wobbled DC grooves arranged alternately, each pair of grooves having a land interposed therebetween, comprising the steps of:

• irradiating a target track on the optical disk with a light beam spot;
• receiving the reflection of said light beam spot from said optical disk;
• and
• calculating, on the basis of the received reflection of said light beam, the address of the position where data are reproduced.