Invention Grant
- Patent Title: Method of compiling shape data of a spectacle lens, spectacle lens shape data compiling device and spectacle lens
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Application No.: US14322563Application Date: 2014-07-02
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Publication No.: US09778486B2Publication Date: 2017-10-03
- Inventor: Kazuma Kozu , Takashi Hatanaka
- Applicant: HOYA CORPORATION
- Applicant Address: JP Tokyo
- Assignee: HOYA CORPORATION
- Current Assignee: HOYA CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2009-060293 20090312
- Main IPC: G02C7/02
- IPC: G02C7/02 ; G06F17/50 ; G02C7/06

Abstract:
A spectacle lens capable of obtaining a good vision without feeling of discomfort, even being fitted into a frame having a large front angle, and a method of creating the shape data of the spectacle lens having dioptric power to be fitted into a frame having a lens front angle. The method corrects the shape data of a lens back surface so that the prismatic effect undergone via the lens of initial lens shape by a plurality of rays passing through a rotation center of the eye in a case where a lens front angle is provided is identical or close to the prismatic effect undergone via the lens of initial lens shape by the plurality of rays passing through the rotation center of the eye in a case where no lens front angle is provided.
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