Tracking Method and Device for Use with an Optical Recording Medium
Номер патента: CA2177546A1
Опубликовано: 01-12-1996
Автор(ы): Kazuo Noda
Принадлежит: Nippon Conlux Co Ltd
Опубликовано: 01-12-1996
Автор(ы): Kazuo Noda
Принадлежит: Nippon Conlux Co Ltd
Реферат: During recording of data on a recording medium, tracking is performed using auxiliary beams to refer to guide tracks as done in the conventional three-beam method. During reproduction of data from the recording medium, tracking is performed using a main beam to refer to a data pit recorded in a recording track in accordance with the push-pull method. In addition, there are provided two tracking control circuits based on the three-beam method and push-pull method, and the use of tracking control signals based on the three-beam and push-pull methods that are output from the two circuits is selected via a switch.
Method and apparatus for correcting angular deviation of optical recording medium
Номер патента: US4774400A. Автор: Fumio Kimura. Владелец: Computer Services Corp. Дата публикации: 1988-09-27.