DeepSData
← Back to library中
Library ／ Gardening ／ Optical recording medium, master for optical recording medium manufacture, recording and reproducing apparatus, and recording and reproducing method
Source reports Expired

Optical recording medium, master for optical recording medium manufacture, recording and reproducing apparatus, and recording and reproducing method

US-7298690-B2

Abstract

To make a magneto-optical disk to have higher track density and enable stable tracking servo to be performed thereon. On an magneto-optical disk, a first groove Gv 1 , a second groove Gv 2 , and a third groove Gv 3 are formed so as to be adjacently arranged. The first groove Gv 1 and the second groove Gv 2 are deep grooves, and the third groove Gv 3 is a shallow groove. Data is recorded on six recording tracks of these three grooves and three lands between respective grooves. A CTS signal is obtained by a sum signal (A+B+C+D) of a photo-detector 6 , and a push-pull signal is obtained by a difference signal (A+D)−(B+C) of a photo-detector 8.

Patent figures（8）

US-7298690-B2 figure 1
1
US-7298690-B2 figure 2
2
US-7298690-B2 figure 3
3
US-7298690-B2 figure 4
4
US-7298690-B2 figure 5
5
US-7298690-B2 figure 6
6
US-7298690-B2 figure 7
7
US-7298690-B2 figure 8
8

Source status & events

No source-status events are recorded.

Related patents (same category)

Method and apparatus for environmental control according to perceived temperatureUS-9078400-B2Planting of plant materialUS-8938910-B2Apparatus for producing EMPUS-8785840-B2Method for detecting a malfunction in an automated irrigation systemUS-8443822-B2Water storage device for growing a lawn surfaceUS-8371066-B2Handle assembly for power toolUS-8347510-B2Root evaluationUS-8341880-B2Moulded body for improving cultivation conditions for plantsUS-8336254-B2
Notice

This page is for reference only, not legal advice

A source status is not a legal conclusionPatent status may change through fee payment, reinstatement, family rights, or jurisdiction. Check current authoritative records and obtain professional advice.
Obtain FTO clearance before useBefore any make, import, or sell decision, obtain a Freedom-to-Operate analysis from a qualified patent professional.