Optical disk apparatus for selectively recording and reproducing

Details Optical disk apparatus for selectively recording and reproducing Optical disk apparatus for selectively recording and reproducing

1993-05-24

1995-01-03

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358310, 358335, H04N 584

Patent

active

053791207

ABSTRACT:
An optical apparatus digitizes a first signal, reproduce or records and reproduce the digital information compressed in a band up to a specified bit rate A1 at a specified rotating speed K or specified linear velocity V, digitizes a second signal, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A2 at a rotating speed of about K.times.A2/A1, or a linear velocity of about V.times.A2/A1, and thereby reproduce or records and reproduces information of plural signals, or reproduces or records and reproduces information of plural compression rates by using only one apparatus. It also digitizes a first signal, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A1 in n optical channels, digitizes a second piece of information, reproduces or records and reproduces the digital information compressed in a band up to a specified bit rate A2 in about n.times.A2/A1 optical channels, and thereby reproduces or records and reproduces information of plural signals, or reproduces or records and reproduces information of plural compression rates using only one apparatus without notably varying the rotating speed or linear velocity. It further enters the light emitted from a semiconductor laser into a nonlinear optical device (SHG), and reproduces the information on a disk surface or records and reproduces the information on a disk surface using the secondary harmonics delivered from the nonlinear optical device.

REFERENCES:
patent: 4963991 (1990-10-01), Honjo
patent: 5065259 (1991-11-01), Kubota et al.
patent: 5115323 (1992-05-01), Tachibana et al.
patent: 5162922 (1992-11-01), Takemura
patent: 5172366 (1992-12-01), Chikuma

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