Optical lens vibration control for optical information recording and/or reproducing apparatus

Claim 1

An optical information recording and/or reproducing apparatus comprising: an optical head including an optical means of converging and radiating a light beam onto an optical information recording medium, a finely moving means, said finely moving means controlling a movement of the optical means in a direction intersecting tracks of the recording medium so that a position of a spot light radiated onto the recording is made finely movable, and an optical system leading the light beam from a light source generating light beams to the optical means and leading the light returning from the recording medium to a photodetector; a coarsely moving means making the optical head movable in the direction intersecting the tracks of the recording medium; starting means for starting a coarse access; control means responsive to the starting means and a sensing means, said control means for controlling the coarsely moving means; said sensing means for sensing until the optical head is located close to a desired track; a clamping means for clamping said optical means when the coarse access of the optical head is made close to an objective track by the coarsely moving means, the clamping means clamping the optical means until a clamping releasing signal is input thereto from a track crossing velocity monitoring means, the clamping of the optical means the being released; and said track crossing velocity monitoring means for detecting whether or not the track crossing velocity, at which the spot light radiated on to the recording medium crosses the tracks of the recording medium, is below a predetermined value so that, when the track crossing velocity is below the predetermined the coarsely moving means, the optical means clamping releasing signal will be output to the clamping means.