Optics: measuring and testing – Lens or reflective image former testing
Reexamination Certificate
2007-10-09
2007-10-09
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
Lens or reflective image former testing
C356S128000
Reexamination Certificate
active
11113070
ABSTRACT:
A lens meter for measuring refractive power distribution of a progressive power lens and displaying its distribution map, has a lens rest having an aperture, an optical system including an axis, a source projecting a light bundle along the axis, a plate having targets and a two-dimensional image sensor detecting images by the bundle passing through the lens, aperture and plate, a part calculating the distribution within a measurement region from detection results, a part detecting a lens-position in a two-dimensional direction orthogonal to the axis, a device guiding movement on the rest to shift the measurement region and obtaining the distribution within an analysis region including distance, progressive and near portions, a part storing the distribution in the measurement region in association with the detected position, a display part, and a part controlling to display the distribution map within the analysis region based on the stored distribution and position.
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Hayashi Akihiro
Kajino Tadashi
Ohtsuki Kan
Nidek Corporation
Oliff & Berridg,e PLC
Ton Tri
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