Method and apparatus for electromechanical recording of short wa

Details Method and apparatus for electromechanical recording of short wa Method and apparatus for electromechanical recording of short wa

1975-06-30

1977-08-23

Lucas, Jay P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

17910041P, 274 46R, H04R 1702, G11B 300

Patent

active

040443795

ABSTRACT:
An unheated cutting stylus is positioned with respect to a metal master in order to cut a groove having a quiescent groove depth less than one micrometer while relative motion is established between the cutting stylus and the metal master. The cutting stylus is vibrated about the quiescent position thereof in response to a relatively high frequency signal while cutting the groove in order to cut an information track comprising short wavelength modulation (e.g., 0.6 to 1.6 micrometers) of groove depth in the bottom of the groove having a peak-to-peak dimension less than the quiescent groove depth. The cutting stylus vibration is effected by a piezoelectric element which is mounted directly between a pedestal and the cutting stylus by means of bonding materials. The pedestal, the piezoelectric element, and the cutting stylus are shaped to form a cutterhead structure having all external surfaces disposed in anti-parallel relationship to each other.

REFERENCES:
patent: 3528665 (1970-09-01), Redlich
patent: 3582549 (1971-06-01), Hell
patent: 3694570 (1972-09-01), Kotov
patent: 3805100 (1974-04-01), Klemp
patent: 3824352 (1974-07-01), Adler
patent: 3829605 (1974-08-01), Dickopp
patent: 3835262 (1974-09-01), Moritz
patent: 3837656 (1974-09-01), Pradervand
patent: 3865997 (1975-02-01), Halter
patent: 3911476 (1975-10-01), Keizer
patent: 3946149 (1976-03-01), White

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