Method and device for checking refractive power distribution and centering

A device for checking the centering of a spectacle lens mounted in a spectacle frame, the device comprising:

• a holder configured to arrange the spectacle lens in a measurement position;
• a display unit configured to display a test structure;
• an image capture unit configured to capture an actual image of the test structure for an imaging beam which passes through the spectacle lens arranged in the measurement position;
• and at least one of:
• a comparison unit configured to compare the captured actual image with a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based, or to compare the captured actual image with a setpoint complement image complementary to a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based;
• or
• a display unit configured to simultaneously display the captured actual image and a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based, or configured to simultaneously display the captured actual image and a setpoint complement image complementary to a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based,
• wherein the holder is configured to hold the spectacle frame in a predefined setpoint measurement position with regard to location and orientation of the spectacle frame.

A method for checking the centering of a spectacle lens mounted in a spectacle frame, the method comprising:

• arranging the spectacle lens mounted in the spectacle frame in a measurement position;
• providing a test structure;
• capturing an actual image of the test structure with an imaging beam which passes through the spectacle lens arranged in the measurement position;
• comparing at least one of:
• the captured actual image with a setpoint image of the test structure which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based, or
• the captured actual image with a setpoint complement image complementary to a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based,
• wherein the measurement position is a predefined setpoint measurement position of the spectacle frame with regard to location and orientation, wherein the predefined setpoint measurement position of the spectacle frame with regard to location and orientation is determined from the coordinates of the centering point of the spectacle lens in the spectacle frame.

A device for checking the centering of a spectacle lens mounted in a spectacle frame, the device comprising:

• a holder configured to arrange the spectacle lens mounted in the spectacle frame in a measurement position;
• a display unit configured to display a test structure;
• an image capture unit configured to capture an actual image of the test structure with an imaging beam which passes through the spectacle lens arranged in the measurement position;
• and at least one of:
• a comparison unit configured to compare the captured actual image with a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based, or to compare the captured actual image with a setpoint complement image complementary to a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based;
• or
• a display unit configured to simultaneously display the captured actual image and a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based, or to simultaneously display the captured actual image and a setpoint complement image complementary to a setpoint image of the test structure, wherein the setpoint image of the test structure is that image which would arise for an imaging beam passing through a spectacle lens arranged in a predefined setpoint measurement position with a predefined setpoint refractive power distribution, wherein the setpoint refractive power distribution is the refractive power distribution which the spectacle lens to be checked should have computationally on account of the design data on which its production is based,
• wherein the holder is configured to hold the spectacle frame in a predefined setpoint measurement position with regard to location and orientation, wherein the predefined setpoint measurement position of the spectacle frame with regard to location and orientation is determined from the coordinates of the centering point of the spectacle lens to be checked.