Lens periphery processing apparatus, method for obtaining processing data, and lens periphery processing method

A method for obtaining processing data of a lens periphery processing apparatus for fitting lenses in an eyeglasses frame, comprising:

• a first step of three-dimensional measurement of the configuration of lens frame portions of said eyeglasses frame;
• a second step of deriving peripheral lengths of the lens frame portions of said eyeglasses frame on the basis of the data obtained in said first step;
• a third step of measuring the lens edge thickness and the lens curve of each lens to be fitted in the frame;
• a fourth step of determining the curve value defined by the locus of the tapered edge on the basis of the data measured in said third step;
• and
• a fifth step of calculating control data of the lens periphery processing apparatus such that the peripheral length of the locus of the tapered edge determined in said fourth step substantially coincides with the peripheral length of the associated lens frame portion of said eyeglasses frame.

A lens periphery processing method for processing peripheries of lenses so as to fit the lenses in an eyeglasses frame, comprising:

• a first step of three-dimensional measurement of the configuration of lens frame portions of said eyeglasses frame;
• a second step of deriving peripheral lengths of the lens frame portions of said eyeglasses frame on the basis of the data obtained in said first step;
• a third step of measuring the lens edge thickness and the lens curve of each lens to be fitted in the frame;
• a fourth step of determining the curve value defined by the locus of the tapered edge on the basis of the data measured in said third step;
• a fifth step of calculating control data of a lens periphery processing apparatus such that the peripheral length of the locus of the tapered edge determined in said fourth step substantially coincides with the peripheral length of the associated lens frame portion of said eyeglasses frame;
• and
• a sixth step of controlling the lens periphery processing apparatus on the basis of the control data obtained in said fifth step.