Optical disk exclusively used for reproduction wherein guide gro

Details Optical disk exclusively used for reproduction wherein guide gro Optical disk exclusively used for reproduction wherein guide gro

1988-01-05

1988-12-06

Cardillo, Raymond F.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369278, 369279, 369 32, G11B 7013

Patent

active

047899794

ABSTRACT:
An optical disk exclusively used for reproduction has an optically detectable guide groove in which signals have previously been recorded. One type of optical disk exclusively used for reproduction is interchangeable with an optical disk which allows both recording and reproducing operations or enables information recorded thereon to be erased. If such an optical disk is not provided with a guide groove in an unrecorded region remaining between a data managing information region and a data recording region, problems may arise when the optical head of an optical disk apparatus is positioned in the unrecorded region at the time of starting the operation of the apparatus and when the optical head effects retrieval between the data managing information region and the data recording region. Therefore, the unrecorded region is cut by employing a method which is different from the method of cutting the data managing information region and the data recording region, thereby eliminating the above-described problems, allowing the recorded information to be read out at an increased speed and enabling a master disk for optical disks to be cut at high efficiency.

REFERENCES:
patent: 4094013 (1978-06-01), Hill et al.
patent: 4290122 (1981-09-01), Bates et al.
patent: 4341952 (1982-07-01), John et al.
patent: 4428075 (1984-01-01), Hazel et al.
patent: 4443870 (1984-04-01), Hazel et al.
patent: 4486870 (1984-12-01), Pettigrew et al.

Affiliated with

Also associated with

Rating

Optical disk exclusively used for reproduction wherein guide gro does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disk exclusively used for reproduction wherein guide gro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk exclusively used for reproduction wherein guide gro will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1497344