Overcoat structure for optical video disc

Details Overcoat structure for optical video disc Overcoat structure for optical video disc

1977-08-29

1978-07-18

Miller, Jr., George H.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 76L, 358128, G01D 1534, G01D 1510

Patent

active

041019075

ABSTRACT:
An optical recording medium comprises a light reflecting material coated with a light absorbing material which is coated with a transparent barrier layer and overcoated with a relatively thick transparent protective layer. During recording, portions of the light absorbing layer are ablated by a modulated focussed light beam, thereby exposing portions of the reflecting layer while leaving the barrier and overcoat layers intact. Information is recorded in the form of a reflective-antireflective pattern. The overcoat layer suspends dust particles far above the focal plane of the recording lens, thereby reducing their effect on the recording or playback signal. The barrier layer insulates the light absorbing layer and the overcoat layer from chemical and thermal interactions which might result in a decreased signal-to-noise ratio.

REFERENCES:
patent: 3560994 (1971-02-01), Wolff et al.
patent: 3665483 (1972-05-01), Becker et al.
patent: 3740761 (1973-06-01), Fechter
patent: 3889272 (1975-06-01), Lou et al.
patent: 3911444 (1975-10-01), Lou et al.
patent: 3971874 (1976-07-01), Ohta et al.
patent: 4000492 (1976-12-01), Willens
patent: 4023185 (1977-05-01), Bloom et al.
patent: 4069487 (1978-01-01), Kasai et al.

Affiliated with

Also associated with

Rating

Overcoat structure for optical video 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 Overcoat structure for optical video disc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Overcoat structure for optical video disc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-342444