Optical Disk Image Drawing Method

An optical disk image drawing method of forming a visible image on an optical disk that includes a data recording layer formed with a track and storing predetermined information along the track and an image drawing layer on which the visible image is to be formed and which is laminated on the data recording layer, wherein data is capable of being recorded on the data recording layer and visible image is capable of being formed on the image drawing layer by applying a laser beam from a same surface side of the optical disk, the method comprising:

• rotating the optical disk by a spindle motor;
• focusing a laser beam having a reproducing power outputted from an optical pick-up on the data recording layer and tracking the laser beam on the track of the data recording layer;
• reading the predetermined information recorded on the track;
• detecting a predetermined position on the track based on the read predetermined information as a reference position in the rotating direction and in the disk radial direction;
• measuring a position of the spindle motor in a rotating direction and a position of the optical pickup in a disk radial direction with respect to the reference position;
• changing a focus position of the laser beam from the data recording layer to the image drawing layer after the reference position is detected;
• and
• starting forming the visible image on the image drawing layer from a predetermined relative position of the spindle motor in the rotating direction with respect to the reference position and a predetermined relative position of the optical pickup in the disk radial direction with respect to the reference position based on the measured position of the spindle motor in the rotating direction and the measured position of the optical pickup in the disk radial direction.

An optical disk image drawing method of forming a visible image on an optical disk that includes a data recording layer formed with a track and storing predetermined information along the track and an image drawing layer on which the visible image is to be formed and which is laminated on the data recording layer, wherein data is capable of being recorded on the data recording layer and visible image is capable of being formed on the image drawing layer by applying a laser beam from a same surface side of the optical disk, the method comprising:

• rotating the optical disk by a spindle motor;
• focusing a laser beam having a reproducing power outputted from an optical pick-up on the data recording layer and tracking the laser beam on the track of the data recording layer;
• reading the predetermined information recorded on the track;
• detecting a predetermined image drawing operation start position on the track from the read predetermined information;
• changing a focus position of the laser beam from the data recording layer to the image drawing layer at a position of the optical pickup in a disk radial direction where the predetermined image drawing operation start position is detected to start forming the visible image on the image drawing layer;
• and
• sequentially moving the optical pick-up in the radial direction synchronously with the rotation of the spindle motor to proceed to form the visible image after the forming operation of the visible image is started.

An optical disk image drawing method of forming a visible image on an optical disk that includes a data recording layer formed with a track and storing position information along the track and an image drawing layer on which the visible image is to be formed and which is laminated on the data recording layer, wherein data is capable of being recorded on the data recording layer and visible image is capable of being formed on the image drawing layer by applying a laser beam from a same surface side of the optical disk, the method comprising:

• (a) rotating the optical disk by a spindle motor;
• (b) reading the position information recorded on the track by focusing a laser beam having a reproducing power outputted from an optical pick-up on the data recording layer by a focus control and tracking the laser beam on the track of the data recording layer by a tracking control;
• (c) holding the tracking control and changing a focus position of the laser beam from the data recording layer to the image drawing layer at a position in a disk radial direction where the position information representing a predetermined image drawing operation start position is detected and carrying out a forming operation of the visible image to be formed at a position in the disk radial direction from a predetermined position of the spindle motor in the rotating direction;
• (d) setting the laser beam to a reproducing power, returning the focus position of the laser beam from the image drawing layer to the data recording layer and tracking the laser beam on the track of the data recording layer after the forming operation of the visible image at the position in the radial direction is completed;
• (e) holding the tracking control and changing a focus position of the laser beam from the data recording layer to the image drawing layer at a position of the track adjacent to the position in the disk radial direction where the tracking control has been held and carrying out the forming operation of the visible image to be formed at a position in the disk radial direction from a predetermined position of the spindle motor in the rotating direction;
• and
• (f) subsequently repeating the steps (d) and (e) to sequentially move the radial position where the forming operation of the visible image is carried out at a pitch of the track and form the visible image.