Patent ID: 6984161
Filing Date: 2006-01-10
Classification: B24B

Abstract:
1. A lens grinding processing apparatus comprising: an apparatus main body; a pair of lens rotating shafts provided rotatably and adjustably in said apparatus main body for relatively approaching and separating on a same axis to hold an eyeglass lens; a shaft rotating driving device for rotating and driving said pair of lens rotating shafts; lens retaining members fixed to opposed end sections of said pair of lens rotating shafts respectively capable of slanting adjustably for slantably holding said eyeglass lens between said pair of lens rotating shafts; a drilling device for drilling a hole for a point frame into the eyeglass lens held between said lens retaining members; a grinding stone, rotatably provided, and capable of relatively approaching to and separating from said lens rotating shafts; a shaft-to-shaft distance variable device for changing a shaft-to-shaft distance between said lens rotating shafts and said grinding stone by relatively approaching and separating said lens rotating shafts and said grinding stone; and an arithmetic control circuit for adjusting the shaft-to-shaft distance between said lens rotating shafts and said grinding stone by controlling said shaft rotating driving device and the shaft-to-shaft distance variable device in motion based on information (θi, ρi); and a lens shape measuring device for measuring a lens thickness which is along a lens shape of said eyeglass lens based on the lens shape information (θi, ρi), wherein said arithmetic control circuit restricts a movement of said lens shape measuring device to slant the eyeglass lens held between said lens retaining members, and drills the hole for fixing the point frame by said drilling device.