Patent ID: 6628580
Filing Date: 2003-09-30
Classification: G11B

Abstract:
An optical recording and reproducing apparatus comprising:a focus device operable to illuminate and focus a light beam onto a recording medium on which tracks are formed; a moving device operable to move said focus device in a direction to cross tracks on the recording medium; a tracking error detector operable to generate a tracking error signal in correspondence to a positional relationship between the light beam and a track on the recording medium; a tracking controller operable to drive said moving device to make the light beam scan the track according to the tracking error signal outputted by said tracking error detector; a track jumping device comprising an acceleration device and a deceleration device, said track jumping device being operable to move the light beam from a first track to an adjacent second track on the recording medium, said acceleration device being operable to apply an acceleration signal to said moving device to accelerate the light beam until the light beam reaches a predetermined point between the first and second tracks, said deceleration device being operable to apply a deceleration signal to said moving device to decelerate the light beam accelerated by said acceleration device; and a timer operable to measure a period from a first time when the light beam is started to move by said track jumping device to a second time when the light beam arrives at the predetermined point between the first and second tracks, wherein said deceleration device in said track jumping device is further operable to change an amplitude or period of the deceleration signal based on the period measured by said timer, wherein the deceleration signal outputted by said deceleration device is a pulse signal of a predetermined period, wherein said deceleration device is further operable to change an amplitude of the pulse signal according to the period measured by said timer, and wherein the pulse signal outputted by said deceleration device has an amplitude equal to a standard amplitude times a ratio of a standard moving time to the period measured by said timer.