| 摘要 |
In an optical information recording and/or reproducing apparatus, information is recorded by applying a beam of light to an optical recording medium and/or the recorded information is reproduced by receiving the reflected light of a beam of light applied to the optical recording medium by a photosensor divided into a plurality of sections. The apparatus has a subtractor for subtracting a plurality of signals from the photosensor divided into a plurality of sections, dividing means for dividing a part of a photocurrent from the photosensor into a predetermined frequency component and a predetermined high frequency component, amplifying means for amplifying the signal of the low frequency component and the signal of the high frequency component produced by the dividing means, an adder for adding the both signals amplified by the amplifying means, and a divider for dividing a subtraction signal obtained by the subtractor by an addition signal obtained by the adder to thereby normalize a servo signal.
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