Rotary optical system for guiding and converging divided light beams to a tape recording medium

An optical pickup device for reading out information from an optical recording medium on which information is recorded on tracks repetitively formed in a longitudinal direction thereof, said device comprising:

• a stationary optical system for emitting a light beam;
• and
• a rotary optical system rotatable around a rotary axis, said rotary optical system comprising:
• an objective lens for converging the light beam on a recording surface of the recording medium and for receiving the light beam reflected by the recording surface, said objective lens moving along the tracks of said recording medium so that the light beam converged on the surface traces the tracks;
• a dividing means for dividing the light beam reflected by the recording surface into a plurality of light beams;
• a guiding means for guiding the light beam from said stationary optical system to the objective lens and for guiding the light beam reflected by the recording surface to said dividing means;
• and
• a light receiving means for receiving the light beams divided by said dividing means to produce a tracking error signal, said objective lens, said dividing means, said guiding means and said light receiving means being arranged so as to be integrally rotated along with said rotary optical system.