Lens shape measuring method and lens shape measuring apparatus

Details Lens shape measuring method and lens shape measuring apparatus Lens shape measuring method and lens shape measuring apparatus

2009-09-29

2010-12-07

Guadalupe-McCall, Yaritza (Department: 2841)

Geometrical instruments

Gauge

Lens

C033S200000, C033S028000

Reexamination Certificate

active

07845088

ABSTRACT:
A lens shape measuring method includes: bringing a feeler into contact with an outer peripheral surface of a spectacle lens, the outer peripheral surface corresponding to a lens shape of spectacles, the feeler being rotatable about a rotation axis and movable forward and backward relative to the rotation axis in a radial direction, and, while keeping the contact state, moving the feeler along a contact surface of the feeler with the lens shape in a circumferential direction, to measure radii ρi (i=0, 1, 2, . . . n) of the lens shape over an entire circumference of thereof, the radii ρi representing change in distance from a geometric center of the lens shape to the feeler, a measurement region of the lens shape being divided into multiple sub-regions, and within each of the sub-regions, the rotation axis line being moved to a position to cause the feeler to measure the lens shape within the sub-region.

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