Patent ID: 7436746

Claim:
A till detection and adjustment system adapter for use in an optical disk drive comprising: a) a reproducing part for reproducing RF data signals at high speed from said optical disk by emitting a light beam onto said optical disk while simultaneously driving the optical disk at a speed higher than the speed at which recording is made in the optical disk wherein reproduction is carried out at high reproduction speed from the optical disk in which data bits having a plurality of different pulse widths are recorded; b) a tilt detecting part for detecting data signals having a narrow pulse width from the RF data signals reproduced at said high reproduction speed, wherein the RF data signal thus reproduced at the high reproduction speed, a data signal which is obtained from the data bits having the narrowest pulse width, from among the data bits recorded in the optical disk, is detected; and c) an adjustment part for adjusting the mechanical configuration of said optical disk in response to only the data signals detected by the tilt detecting part (b) to minimize the detected tilt.