Variable lead optical tracing machine with scanning and vari-foc

Details Variable lead optical tracing machine with scanning and vari-foc Variable lead optical tracing machine with scanning and vari-foc

1977-10-25

1978-12-05

Henry, Jon W.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 69, 250202, G01B 2717

Patent

active

041282973

ABSTRACT:
This application relates to circular scanning line tracers or edge tracers and has particular reference to means for producing adjustable lead. In tracing apparatus having a circular scan, the scanner scans in advance of the point of rotation of the tracing mechanism by an amount referred to as the lead. This lead ideally varies depending on the tracing velocity. It is proposed to apply a vari-focal lens to the optics to provide a scanning circle of adjustable diameter to vary the lead.

REFERENCES:
patent: 2930894 (1960-03-01), Bozeman
patent: 3268731 (1966-08-01), Brouwer et al.
patent: 3479513 (1969-11-01), Simpson et al.
patent: 3496437 (1970-02-01), Layden
patent: 3499155 (1970-03-01), Turbett
patent: 3704372 (1972-11-01), Parker et al.
patent: 3704373 (1972-11-01), Bradwell et al.
patent: 4072301 (1978-02-01), Brouwer

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