Lens meter

Details Lens meter Lens meter

2007-04-24

2007-04-24

Toatley, Jr., Gregory J (Department: 2877)

Optics: measuring and testing

Lens or reflective image former testing

Reexamination Certificate

active

11066246

ABSTRACT:
A lens meter obtaining 0D-reference-coordinates of target-images not detected in a reference state and measuring even progressive lenses, has a lens rest, an optical system having an optical axis, a light source, measurement targets and a photo-sensor, a part calculating optical characteristics based on coordinates-change of target-images in a measurement state with the lens on the rest and axis from those in a reference state without the lens thereon, and an information memory. The part makes the memory store image-coordinates not detected in the reference state obtained during assembly/adjustment, and based on image-coordinates detected in the reference state after power application and before measurement and stored coordinates, obtains image-coordinates not detected in the reference state after power application and before measurement, and calculates characteristics based on coordinates-change of target-images detected in the measurement state from those detected in the reference state before measurement and obtained image-coordinates.

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