Abstract: An optical pickup actuator includes a lens holder on which a plurality of object lenses to use in recording/reproducing information onto/from different kinds of optical media are mounted, a tilting unit tilting the lens holder, and a controller controlling the tilting unit to tilt the lens holder about one of the object lenses that is appropriate to use in recording/reproducing information onto/from a kind of optical medium to be used.

Abstract: Provided is a tilt compensation method and apparatus that effectively compensates for a tilt of an information storage medium. The tilt compensation method includes calculating a tilt value at more than one local point of the information storage medium using a focus-on-drive (FOD) sensitivity function and a tilt sensitivity function of a pickup of a recording and/or reproducing apparatus which records data onto and/or reproduces data from the information storage medium, obtaining a skew component of the pickup, obtaining an abnormal component caused by a sensitivity difference of the pickup with respect to the information storage medium; and compensating for the calculated tilt value using the obtained skew and abnormal components.

Abstract: An optical pickup actuator includes a lens holder on which a plurality of object lenses to use in recording/reproducing information onto/from different kinds of optical media are mounted, a tilting unit tilting the lens holder, and a controller controlling the tilting unit to tilt the lens holder about one of the object lenses that is appropriate to use in recording/reproducing information onto/from a kind of optical medium to be used.

Abstract: Disclosed are an optical recording/reproducing apparatus for a CLV error recovery and a method thereof that can recover from a CLV error in a short time.