Eyeglass frame and lens tracing apparatus and method

Details Eyeglass frame and lens tracing apparatus and method Eyeglass frame and lens tracing apparatus and method

G - Physics

01

B

G01B 5/008 (2006.01) B24B 9/14 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2283495

Apparatus for tracing the perimeter shape of a the lens holding aperture of an eyeglass frame, or an eyeglass lens includes a holder to releasably hold an eyeglass frame or lens for tracing measurement. A tracing stylus has a 3 axis movement control apparatus to move the stylus around an axis of rotation and in a vertical and a horizontal direction of a plane rotatable about the axis of rotation. The stylus is urged into horizontal contact with the frame or lens to be traced by a horizontal axis motor dynamically controlled to optimized the contact force between the tracing stylus and frame or lens during the trace process. Control of the vertical movement axis of the stylus optimally provides a weightless behaviour of the stylus permitting it to move vertically responsive to external vertical forces.

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