Layout display device of the spectacle lens, eyeglass lens processing data calculation method, and eyeglass lens grinding apparatus

摘要

PROBLEM TO BE SOLVED: To provide a layout display device for a spectacle lens capable of eliminating determination mistake of a worker when the spectacle lens adapted for a so-called spectacle frame with high curve is manufactured by grinding machining.;SOLUTION: A middle point of an opening reference straight line STL obtained by connecting both ends of a projection frame obtained by projecting respective frames 1, 2 from a direction perpendicular to a horizontal plane to the horizontal plane including mutually parallel visual axis lines Vs is defined as a geometric center P1, and an angle that the opening reference straight line STL forms relative to a straight line vertical to the visual axis line Vs in the horizontal plane is defined as a warping angle '. In the state that the opening reference straight line STL is turned by the warping angle ' in a direction perpendicular to the visual axis line Vs making the middle point as reference, a frame shape obtained by projecting the respective frames 1, 2 to a perpendicular plane perpendicular to the horizontal plane is displayed as a ball-like shape line Fs. The layout display device includes a layout screen 6 for displaying the geometric center P1 and a pupil position Pi' of the projection frame after turning corresponding to a pupil position Pi before turning of the projection frame.;COPYRIGHT: (C)2011,JPO&INPIT