Optical recording and reproducing disc

Details Optical recording and reproducing disc Optical recording and reproducing disc

1981-04-15

1983-05-24

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Disc

346 76L, 369278, 369280, G01D 1534

Patent

active

043853030

ABSTRACT:
An optical recording and reproducing disc for recording and/or reproducing information by the application of laser beams having a wavelength .lambda. in the range of 0.7 to 1.0 .mu.m, the disc being constituted by a disc-shaped base having at least one spiral guide track thereon with top surfaces parallel to the surface of the base at a height above the base different from the top surfaces of the portions of the base between the spires of the track, which height is in the range of .lambda./12 to .lambda./6, the guide track having a width approximately equal to the effective diameter of the laser beams; and a uniform thickness coating of a light recording material on the top surface of the guide track and the portions of the base between the spires of the guide track, the light recording material being a material the transmittance and/or the reflectance of which is varied by irradiation by the laser beams.

REFERENCES:
patent: 3373997 (1968-03-01), Berndt
patent: 3902010 (1975-08-01), Goshima
patent: 4005259 (1977-01-01), Kaneko
patent: 4037251 (1977-07-01), Bricot

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2148032