Optical recording and reproducing apparatus including a disc ext

Details Optical recording and reproducing apparatus including a disc ext Optical recording and reproducing apparatus including a disc ext

1987-07-17

1989-01-03

Sikes, William L.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369106, 369116, 369278, 369280, 250205, G11B 390, G01J 132

Patent

active

047962500

ABSTRACT:
An apparatus for recording and reproducing data into/from an optical disc, which includes an optical disc having an optical recording medium into and from which data can be written and erased, a laser diode to write, erase, and read out data into and from the optical disc, and a power setting circuit for sampling and holding a detection output from a photo diode to detect the light emission power of the laser diode, for comparing the value sampled and held with a target value, and for setting the power of laser diode. A light emission power of laser diode in each of the data writing, erasing, and reading modes is controlled by the power setting means. A part of a recording area of the optical disc is provided with an extracting area to sample and hold the detection output from the photo diode.

REFERENCES:
patent: 4344173 (1982-08-01), Straus
patent: 4443870 (1984-04-01), Hazel et al.
patent: 4516242 (1985-05-01), Yokota
patent: 4523089 (1985-06-01), Maeda et al.
patent: 4562567 (1985-12-01), Frankfort et al.
patent: 4660189 (1987-04-01), Tsukamura et al.
patent: 4685097 (1987-08-01), van der Put
patent: 4689795 (1987-08-01), Yoshimoto et al.
patent: 4742505 (1988-05-01), Takeuchi et al.
patent: 4750161 (1988-06-01), Takeuchi et al.

Affiliated with

Also associated with

Rating

Optical recording and reproducing apparatus including a disc ext 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 recording and reproducing apparatus including a disc ext, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical recording and reproducing apparatus including a disc ext will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2173474