MANUFACTURING APPARATUS AND MANUFACTURING METHOD FOR SPECTACLE LENS
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United States of America Patent
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Jun 9, 2016
app pub date -
Nov 28, 2013
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Nov 28, 2013
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Defining a reference lens common to a left and a right; defining a reference object surface; calculating chief ray passing positions on the reference lens and a prescribed lens through which a chief ray from each point on each of the plurality of object surfaces passes; calculating a ratio between a distance from an intersection between a visual line in a front view and the reference lens to the chief ray passing position on the reference lens and a distance from an intersection between a visual line in a front view and the prescribed lens to the chief ray passing position on the prescribed lens; and correcting a curvature distribution of the prescribed lens by correcting curvature at the chief ray passing position on the prescribed lens corresponding to each point on each of the plurality of object surfaces.
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