Variable lead optical tracing machine

Details Variable lead optical tracing machine Variable lead optical tracing machine

G - Physics

02

B

340/134.4, 88/96

G02B 26/12 (2006.01)

Patent

CA 1077755

ABSTRACT OF THE DISCLOSURE 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.

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