An optical pickup apparatus for reading and recording information on recording media includes a semiconductor laser, a collimating lens, a half mirror, a reflecting mirror, and an objective lens. Further included therein are a super-resolution cutoff filter and an aperture control filter, one of which is appropriately selected and set right before the objective lens by a filter switching-over device. When reading the DVD, the super-resolution cutoff filter is set at the optical path, whereas when reading the CD, the aperture control filter is set thereat. The filter switching device is arranged separately from an actuator driving system having the objective lens integrally structured therewith.

 
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< Method of recording/reproducing information on a recording medium with plural phase change recording layers

< Optical pickup, optical information recording/reproducing apparatus using the same, and phase variable wave plate used in the pickup and the apparatus

> Laser diode drive circuit and amplifying circuit for optical disc recording and/or reproducing apparatus

> Optical head device and optical recording and reproducing apparatus having lasers aligned in a tangential direction

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