Abstract: A reader/writer apparatus for an optical memory card for reading and/or writing data with respect to the optical memory card having a data storing face, which apparatus comprises a card holder including a carriage carrying and holding the card inserted and transporting the card to a reading or writing position and a feeding mechanism for driving the carriage. The reader/writer of the present invention may further comprise an optical waveguide holder holding an optical waveguide, which is connected, at a base end thereof, to the light emitting and receiving section of a reading head, so that another end of the optical waveguide may oppose a data recording face of the optical memory card. The waveguide holder is moved independently of the movement of the car holder. The reader/writer apparatus of the present invention may further comprise a regulating member for regulating the angular position of the card.

Abstract: A reader-writer apparatus for an optical memory card for reading and/or writing data with respect to the optical memory card having a data storing face, which apparatus includes a card holder including a carriage for carrying and holding the card inserted thereon and transporting the card to a reading or writing position and a feeding mechanism for driving the carriage. The reader/writer in another aspect of the present invention includes an optical waveguide holder holding an optical waveguide, which is connected at a base end thereof to the light emitting and receiving section of a reading head, so that another end of the optical waveguide may oppose a data recording face of the optical memory card. The waveguide holder is moved independently of the movement of the card holder.

Abstract: Method and a device for reading out optically recorded data from an optical recording medium having data recording regions defined by reference lines in stripe and plural data tracks arranged in parallel to each other and perpendicular to said reference lines. According to the present inventions, a drastic change in the position of a reference line at a given order within the sensing field is monitored from among plural reference lines covered by the field. If there is any drastic change, the order of the reference line for reading is modified so that the data track to be read can be accurately followed even if the field of the reading sensor is deviated in the direction of the data tracks. It also enables correct data reading by checking whether the position of the reference lines included in the field of the reading sensor is within the preset tolerance.