Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1994-03-29
1995-10-17
Sugarman, Scott J.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369 13, 369116, 369 4437, 3692752, 369288, G11B 378
Patent
active
054597110
ABSTRACT:
An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.
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patent: 5170390 (1992-12-01), Ohta et al.
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Hirokane Junji
Inui Tetsuya
Katayama Hiroyuki
Mieda Michinobu
Nishitani Yukinori
Chu Kim-Kwok
Sharp Kabushiki Kaisha
Sugarman Scott J.
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