System and method for inspecting lenses

Details System and method for inspecting lenses System and method for inspecting lenses

G - Physics

01

M

G01M 11/00 (2006.01) G01M 11/02 (2006.01)

Patent

CA 2151355

A system and method for inspecting ophthalmic lenses. The system includes a transport subsystem for moving the lenses into an inspection position, a light sensor, and an illumination subsystem for generating a light beam and conducting the light beam through the lenses in the inspection position and onto the light sensor to form images of the lenses on the light sensor. The system further includes a data value generator to generate a set of data values for each lens image formed on the light sensor, and a processor for analyzing those data values. Preferably, the processor locates the lens image on the light sensor, tests that image to determine if the lens is badly torn, and determines a model for the outer edge of the lens image. The processor may calculate a decentration value for the lens, and test for any irregularities in the peripheral and center zones of the lens.

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