Spectacle lens, manufacturing apparatus and manufacturing method for spectacle lens
AssigneeHoya Corporation
InventorTakao TANAKA
Life of this patent
Estimating the term…
Abstract
A spectacle lens is manufactured by measuring an optical surface of a semi-finished lens blank, making a calculation for a shape of a non-optical surface of the semi-finished lens blank based on a measurement result and a prescription, and processing the non-optical surface in accordance with a result of the calculation.
Claims22
1-11. (canceled)
A manufacturing apparatus for manufacturing a spectacle lens suitable for a prescription using a semi-finished lens blank having one surface being an optical surface and another surface being a non-optical surface, comprising:
- an optical surface measuring unit that measures the optical surface of the semi-finished lens blank;
- an shape error calculating unit that makes a calculation for a shape error distribution of the optical surface based on a measurement result of the optical surface and weights the calculated shape error distribution;
- a non-optical surface calculating unit that determines a shape of the non-optical surface by applying the weighted shape error distribution by the shape error calculating unit to a tentative shape of the non-optical surface calculated tentatively based on the prescription;
- and
- a non-optical surface processing unit that manufactures the spectacle lens by processing the non-optical surface so as to be the determined shape.
A manufacturing apparatus for manufacturing a spectacle lens suitable for a prescription using a semi-finished lens blank having one surface being an optical surface and another surface being a non-optical surface, comprising:
- an optical surface measuring unit that measures optical surfaces of a plurality of semi-finished lens blanks satisfying a predetermined common manufacturing condition;
- a shape error calculating unit that makes a calculation for a shape error distribution of the optical surface of a semi-finished lens blank satisfying the predetermined common manufacturing condition based on a measurement result of the optical surfaces of the plurality of semi-finished lens blanks and weights the calculated shape error distribution;
- a non-optical surface calculating unit that, when the semi-finished lens blank satisfying the predetermined common manufacturing condition is used, determines a shape of the non-optical surface by applying the weighted shape error distribution by the shape error calculating unit to a tentative shape of the non-optical surface calculated tentatively based on the prescription;
- and
- a non-optical surface processing unit that manufactures the spectacle lens by processing the non-optical surface so as to be the determined shape.
A spectacle lens manufactured based on a prescription using a semi-finished lens blank having one surface being an optical surface and another surface being a non-optical surface, comprising:
- the optical surface;
- and
- a processed surface having a shape cancelling a shape error distribution of the optical surface calculated based on a measurement result of the optical surface, wherein the shape error distribution to be cancelled is weighted and the processed surface is formed by processing the non-optical surface.
A manufacturing method for manufacturing a spectacle lens suitable for a prescription using a semi-finished lens blank having one surface being an optical surface and another surface being a non-optical surface, comprising:
- measuring the optical surface of the semi-finished lens blank;
- making a calculation for a shape error distribution of the optical surface based on a measurement result of the optical surface and weighting the calculated shape error distribution;
- determining a shape of the non-optical surface by applying the weighted shape error distribution to a tentative shape of the non-optical surface calculated tentatively based on the prescription;
- and
- manufacturing the spectacle lens by processing the non-optical surface so as to be the determined shape.
A manufacturing method for manufacturing a spectacle lens suitable for a prescription using a semi-finished lens blank having one surface being an optical surface and another surface being a non-optical surface, comprising:
- measuring optical surfaces of a plurality of semi-finished lens blanks satisfying a predetermined common manufacturing condition;
- making a calculation for a shape error distribution of the optical surface of a semi-finished lens blank satisfying the predetermined common manufacturing condition based on a measurement result of the optical surfaces of the plurality of semi-finished lens blanks and weighting the calculated shape error distribution;
- when the semi-finished lens blank satisfying the predetermined common manufacturing condition is used, determining a shape of the non-optical surface by applying the weighted shape error distribution to a tentative shape of the non-optical surface calculated tentatively based on the prescription;
- and
- manufacturing the spectacle lens by processing the non-optical surface so as to be the determined shape.
A spectacle lens manufactured based on a prescription using a semi-finished lens blank having one surface being an optical surface and another surface being a non-optical surface, comprising:
- an optical surface having a rotationally asymmetrical shape error distribution;
- and
- a processed surface having a rotationally asymmetric shape cancelling the rotationally asymmetric shape error distribution calculated based on a measurement result of the optical surface, wherein the processed surface is formed by processing the non-optical surface.
Dependencies are inferred from the claim text.