Method and device for processing lens
AssigneeHoya Corporation
InventorsKeigo Hasegawa, Yoshihiro Kikuchi, Shigeru Takizawa
Life of this patent
Estimating the term…
Abstract
The optical surface of a lens (21) held and rotated by the rotating shaft (12) of a lathe is cut or ground into an aspherical surface from a direction perpendicular to the axis of the rotating shaft (12) and the axial direction of the rotating shaft (12) while a processing locus (t) which is concentric or spiral about the rotating shaft (12) as the center is formed. In processing, the lens (21) is arranged in a grinding region (20) at a position spaced apart from the turning center (Zo) of the processing locus (t).
Claims14
A lens processing method of processing an optical surface of a lens held and rotated by a rotating shaft of a lathe into an aspherical shape by a processing tool from a direction perpendicular to an axis of the rotating shaft and an axial direction of the rotating shaft while a processing locus which is either concentric or spiral about the rotating shaft as the center is formed, comprising
- the step of arranging the lens, wherein in the step of arranging the lens, lens shape information on a spectacle lens is obtained in advance, and the lens is arranged such that the rotating shaft is positioned at least outside a lens shape region of the lens.
A lens processing method of processing an optical surface of a lens held and rotated by a rotating shaft of a lathe into an aspherical shape by a processing tool from a direction perpendicular to an axis of the rotating shaft and an axial direction of the rotating shaft while a processing locus which is either concentric or spiral about the rotating shaft as the center is formed, comprising
- the step of arranging the lens, wherein the step of arranging the lens comprises the step of obtaining lens shape information on a spectacle lens in advance and arranging the lens such that the rotating shaft is positioned at least outside a lens shape region of the lens.
Dependencies are inferred from the claim text.