Optical head device, and optical recording/reproducing device

An optical recording/reproducing apparatus, comprising:

• a rotary driving means for a rotary recording medium for optically or magneto-optically recording and/or recording/reading data;
• a flying head type optical head apparatus comprising a fixed arm;
• a suspension, an end of which is fixed to said fixed arm and the other end is a free end;
• a slider attached to the free end of said suspension;
• an object lens mounted on said slider;
• an optical means fixed to said fixed arm and having a light source and a light receiving system with the fixed arm disposed between said object lens and said optical means;
• a collimator lens positioned between said fixed arm and said object lens along an optical axis connecting said light source and said object lens via said collimator lens, for converging a light from said light source to make it enter said object lens;
• and a first collimator lens moving means for moving said collimator lens along said optical axis between said fixed arm and said object lens;
• wherein the slider mounted with said object lens, attached to the free end of said suspension floats due to a wind pressure caused by rotation of said rotary recording medium rotating at a position facing to said object lens;
• and
• a control apparatus for performing tracking control on said optical head apparatus, comprising a collimator lens position control means for controlling a position of said collimator lens by driving said first collimator lens moving means based on a focus error signal.