Abstract: An LPF performs low-pass filtering for a light reception signal responsive to return light received by an optical pickup. A comparator makes a comparison between the level of the signal output from the LPF and a predetermined threshold value and outputs a high or low pulse signal MIR. A system control section determines the pulse signal MIR for each predetermined dot region. If the pulse signal MIR output from the comparator is high, the system control section writes “1” into buffer memory; if the pulse signal MIR is low, the system control section writes “0” into the buffer memory. The pixel string data recorded in the buffer memory is transferred to a host and an image responsive to pixel string data is displayed on a display.

Abstract: An optical disk has inner and outer information areas respectively in inner and outer portions thereof in each of which a groove is formed at a predetermined width. A planar mirror surface is provided without forming a groove, in an area lying between the areas. When a laser beam is applied to the area to form a visible image, visible-image information, capable of representing the position, shape and size of an area occupied by the visible image, is formed and recorded in the area. When additionally forming a visible image, the image area information is read from the area to display on an edit screen an optical disk and an area of a visible image already formed on the surface of the disk. The user is allowed to determine a newly-recording visible image and its position by use of the edit screen.

Abstract: An LPF performs low-pass filtering for a light reception signal responsive to return light received by an optical pickup. A comparator makes a comparison between the level of the signal output from the LPF and a predetermined threshold value and outputs a high or low pulse signal MIR. A system control section determines the pulse signal MIR for each predetermined dot region. If the pulse signal MIR output from the comparator is high, the system control section writes “1” into buffer memory; if the pulse signal MIR is low, the system control section writes “0”into the buffer memory. The pixel string data recorded in the buffer memory is transferred to a host and an image responsive to pixel string data is displayed on a display.

Abstract: A system control unit writes image data received from a host apparatus into a first storage regions. Next, the system control unit produces duplication data from the image data written in the first storage region, and then, writes these produced duplication data into a second storage regions. Furthermore, the system control unit furthermore produces duplication data from the image data written in the second storage region, and writes these produced duplication data into a third storage region. As a result, 1 piece of the image data and 2 pieces of the duplication data can be prepared on a buffer memory. The optical disk drawing apparatus draws an image on a drawing layer of an optical disk by employing these image data and duplication data.

Abstract: A pertinent amount of Image data of an image to be drawn on a surface of an optical disc is intermittently transmitted from a computer to an optical disc image drawing apparatus. The optical disc image drawing apparatus stores the transmitted image in a buffer memory and successively reads the stored image data in a constant speed to performing the drawing operation on the surface of the optical disc. The computer counts the total amount of image data of transmission is completed and calculates a drawing radial position, which corresponds to the counted total amount with a currently drawing radial position. The computer displays a picture of the drawing image on a display so that the currently drawing radial position calculated above can be visually recognized.

Abstract: An optical disk has inner and outer information areas respectively in inner and outer portions thereof in each of which a groove is formed at a predetermined width, A planar mirror surface is provided without forming a groove, in an area lying between the areas. When a laser beam is applied to the area to form a visible image, visible-image information, capable of representing the position, shape and size of an area occupied by the visible image, is formed and recorded in the area. When additionally forming a visible image, the image area information is read from the area to display on an edit screen an optical disk and an area of a visible image already formed on the surface of the disk.