Patent ID: 7420892

Claim:
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, converging a returned-back light from said object lens to make it enter said light source; 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 of a rotary body rotating at a position facing to said object lens.