Cutting machine for pits on CD master

Details Cutting machine for pits on CD master Cutting machine for pits on CD master

1987-07-29

1989-01-31

Smith, Jerry

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Mechanical modification or sensing of storage medium

310311, G11B 300

Patent

active

048021563

ABSTRACT:
A cutting machine for cutting pits on a laser disc master comprising a disc signal source with a RAM and a series of shift registers; a machine unit having a servo-rotary shaft for mounting a master disc; a servo-horizontally moving shaft perpendicular to the rotary shaft; a deviation sensor mounted on the horizontally moving shaft perpendicular to the master disc; and a diamond cutting tool controlled by a signal-source-controlled piezoelectric driver. It also comprises a computer unit, which includes a disc signal control interface, and machine unit control interfaces. The rotation error of the machine unit can modulate the signal output speed of the signal source.

REFERENCES:
patent: 3842194 (1974-10-01), Clemens
patent: 4035590 (1977-07-01), Halter
patent: 4277796 (1981-07-01), Ross
patent: 4295216 (1981-10-01), Truesdell et al.
patent: 4349902 (1982-09-01), Valachovic et al.
patent: 4434481 (1984-02-01), Toda et al.
patent: 4453242 (1984-06-01), Toda
patent: 4477892 (1984-10-01), Tosima et al.

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