ApplicationNo. 380677 filed on 07/14/1989
US Classes:369/111, Spiral or helical track235/470, With scanning of record720/695, Optical storage medium support (i.e., turntable or spindle motor)720/745Optical card record
ExaminersPrimary: McElheny, Donald Jr.
Attorney, Agent or Firm
Foreign Patent References
International ClassG11B 017/028
Foreign Application Priority Data1986-05-13 JP
AbstractThis specification discloses a card-like optical information recording medium comprising a card-like base body, and concentric circular or spiral information tracks provided on the base body and capable of optically recording and/or reproducing information thereon. The specification also discloses an apparatus for recording and/or reproducing information on such card-like optical information recording medium which comprises a turn table rotatable with the card-like medium being placed thereon, a clamp mechanism for positioning and fixing the card-like medium on the turn table, and an optical head for applying a light beam to the card-like medium while moving radially of the rotation, thereby effecting recording and/or reproduction of information concentrically or spirally.