Patent ID: 7539090

Claim:
An optical information apparatus, comprising: an optical pick-up head including: a light source emitting a light beam; a condensing unit receiving a beam from the light source and condensing the beam onto an optical recording medium; a beam splitter receiving the beam reflected from the optical recording medium and splitting the beam; and a photodetector receiving the beams split by the beam splitter and outputting signals in accordance with amounts of the received light beams; wherein the photodetector has a plurality of light-receiving portions, a tracking error signal generator generating a tracking error signal for irradiating a desired track with a beam; a focus error signal generator generating a focus error signal for irradiating a desired focus position with a beam; a recording/non-recording detector detecting whether or not information is recorded at a position of the beam condensed on the optical recording medium; and an amplitude controller controlling an amplitude of the tracking error signal with a coefficient k, wherein the amplitude controller is controlled by using a signal generated from the recording/non-recording detector and a signal generated from the focus error signal generator.