| 摘要 |
An optical information recording/reproducing apparatus performs at least one of recording and reproducing of information by applying an optical spot to a record medium having a plurality of guide tracks and a plurality of information tracks. The apparatus has an optical detection device disposed at a position to which an imaging spot of a light reflected from the record medium is applied and having a plurality of optical detection portions arranged in a line in the direction intersecting at substantially right angles an image of at least one guide track so as to detect the light reflected from the optical detection portions and output a signal, an address position specifying circuit for specifying the address positions of a plurality of optical detection portions for scanning the optical detection device, a detector output selecting circuit for selecting the output of a plurality of optical detection portions in accordance with the output from the address position specifying circuit, a detection region setting circuit for setting a guide track detection region having a predetermined width for detecting a guide track, a track position detection circuit for detecting the address positions of optical detection portions corresponding to at least one guide track on the basis of the output from the detector output selecting circuit and the detection region setting circuit, and a track error generating circuit for generating a track error signal on the basis of the output from the track position detection circuit.
|
