Method for Calculation of the Magnification and/or Distortion and Method for Production of a Spectacle Lens with Low Magnification and/or Distortion
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Accused Products
Abstract
The invention relates to a method for calculation of the local magnification and/or the local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, with the spectacle lens being designed to correct a refraction deficit of an eye, and having at least one object-side surface and one second eye-side surface, comprising the following steps: Calculation for the predetermined or predeterminable viewing direction of the profile of a main beam which originates from a predetermined or predeterminable infinitesimally small object and, after refraction by the spectacle lens, passes through the rotation point of the eye, through the entrance pupil of the eye or through the principal plane of the eye; determination of the main curvatures and directions of a local wavefront associated with the main beam on refraction by the spectacle lens; calculation of the local magnification and/or the local distortion of the spectacle lens from the determined main curvatures and directions of the local wavefront, the data relating to the profile of the main beam, and the data relating to the spectacle lens.
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Citations
44 Claims
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1-22. -22. (canceled)
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23. A method of calculating local magnification and/or local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, the spectacle lens being configured for correcting a refractive deficit of an eye and having at least a first object-side surface and a second eye-side surface, comprising:
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calculating a course of a main beam for the predetermined or predeterminable viewing direction, which main beam originates from a predetermined or predeterminable infinitesimally small object and, after refraction by the spectacle lens, passes through a rotation point of the eye, through eye entrance pupils or through an eye principal plane; determining main curvatures and directions of a local wave front associated with the main beam on refraction by the spectacle lens; and calculating a local magnification and/or a local distortion of the spectacle lens from the determined main curvatures and local wave front directions, with main beam course data and spectacle lens data. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A computer program product that is designed, when loaded and executed on a computer, for implementing the method of calculating local magnification and/or local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, the spectacle lens being configured for correcting a refractive deficit of an eye and having at least a first object-side surface and a second eye-side surface, comprising:
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calculating a course of a main beam for the predetermined or predeterminable viewing direction, which main beam originates from a predetermined or predeterminable infinitesimally small object and, after refraction by the spectacle lens, passes through a rotation point of the eye, through eye entrance pupils or through an eye principal plane; determining main curvatures and directions of a local wave front associated with the main beam on refraction by the spectacle lens; and calculating a local magnification and/or a local distortion of the spectacle lens from the determined main curvatures and local wave front directions, with main beam course data and spectacle lens data.
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36. A data carrier having a computer program stored thereon, wherein the computer program is designed, when loaded and executed on a computer, to carry out the method of calculating local magnification and/or local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, the spectacle lens being configured for correcting a refractive deficit of an eye and having at least a first object-side surface and a second eye-side surface, comprising:
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calculating a course of a main beam for the predetermined or predeterminable viewing direction, which main beam originates from a predetermined or predeterminable infinitesimally small object and, after refraction by the spectacle lens, passes through a rotation point of the eye, through eye entrance pupils or through an eye principal plane; determining main curvatures and directions of a local wave front associated with the main beam on refraction by the spectacle lens; and calculating a local magnification and/or a local distortion of the spectacle lens from the determined main curvatures and local wave front directions, with main beam course data and spectacle lens data.
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37. A system for calculating a local magnification and/or a local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, the spectacle lens being designed for correcting a refraction deficit of an eye and having at least a first object-side surface and a second eye-side surface, comprising:
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collecting devices for the collection of data relative to the spectacle lens; calculating devices for calculating by means of the data relative to the spectacle lens the course of a main beam for the predetermined or predeterminable viewing direction, the main beam originating from a predetermined or predeterminable infinitesimally small object and, after the refraction by the spectacle lens, extending through the rotation point of the eye, through the entrance pupil of the eye or through the principal plane of the eye; calculating devices for calculating the main curvatures and directions of a local wave front pertaining to the main beam during the refraction by the spectacle lens; and calculating devices for calculating the local magnification and/or the local distortion of the spectacle lens from the determined main curvatures and directions of the local wave front, the data of the course of the main beam and the data relative to the spectacle lens.
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38. A method of producing a spectacle lens while taking into account a magnification and/or a distortion of the spectacle lens, the spectacle lens being designed for a correction of a refraction deficit of an eye and at least having a first object-side surface and a second eye-side surface, the method comprising a calculation or optimization step, the calculating or optimization step taking place such that a performance function F is minimized,
wherein -
F = min ( ∑ i G V , i ( N Ist ( i ) - N Soll ( i ) ) 2 + ( G Z , i ( Z Ist ( i ) - Z Soll ( i ) ) 2 ) ) , and wherein Nactual(i) indicates the actual magnification of the spectacle lens at the i-th evaluation point Ndes(i) indicates the desired magnification of the spectacle lens at the i-th evaluation point Gv,j indicates the weighting of the magnification of the spectacle lens at the i-th evaluation point Zactual(i) indicates the actual distortion of the spectacle lens at the i-th evaluation point Zdes(i) indicates the desired distortion at the i-th evaluation point, and Gz,j indicates the weighting of the distortion at the i-th evaluation point. - View Dependent Claims (39, 41)
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40. A method of calculating local magnification and/or local distortion of a spectacle lens in at least one predetermined or predeterminable viewing direction, the spectacle lens being configured for correcting a refractive deficit of an eye and having at least a first object-side surface and a second eye-side surface, comprising:
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calculating a course of a main beam for the predetermined or predeterminable viewing direction, which main beam originates from a predetermined or predeterminable infinitesimally small object and, after refraction by the spectacle lens, passes through a rotation point of the eye, through eye entrance pupils or through an eye principal plane, determining main curvatures and directions of a local wave front associated with the main beam on refraction by the spectacle lens; calculating a local magnification and/or a local distortion of the spectacle lens from the determined main curvatures and local wave front directions, with main beam course data and spectacle lens data; and minimizing a performance function F, wherein and wherein Nactual(i) indicates the actual magnification of the spectacle lens at the i-th evaluation point Ndes(i) indicates the desired magnification of the spectacle lens at the i-th evaluation point Gv,j indicates the weighting of the magnification of the spectacle lens at the i-th evaluation point Zactual(i) indicates the actual distortion of the spectacle lens at the i-th evaluation point Zdes(i) indicates the desired distortion at the i-th evaluation point, and Gz,j indicates the weighting of the distortion at the i-th evaluation point.
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42. A computer program product that is designed, when loaded and executed on a computer, for implementing a method of optimizing a spectacle lens while taking into account a magnification and/or a distortion of the spectacle lens, the method for the optimization of the spectacle lens comprising a calculation or optimization step which takes place such that the performance function F is minimized,
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F = min ( ∑ i G V , i ( N Ist ( i ) - N Soll ( i ) ) 2 + ( G Z , i ( Z Ist ( i ) - Z Soll ( i ) ) 2 ) ) , wherein Nactual(i) indicates the actual magnification of the spectacle lens at the i-th evaluation point, Ndes(i) indicates the desired magnification of the spectacle lens at the i-th evaluation point, Gv,j indicates the weighting of the magnification of the spectacle lens at the i-th evaluation point, Zactual(i) indicates the actual distortion of the spectacle lens at the i-th evaluation point, Zdes(i) indicates the desired distortion at the i-th evaluation point, Gz,j indicates the weighting of the distortion at the i-th evaluation point.
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43. A data carrier having a computer program stored thereon, wherein the computer program is designed, when loaded and executed on a computer, for implementing a method of optimizing a spectacle lens while taking into account the magnification and/or the distortion of the spectacle lens, the method of optimizing the spectacle lens comprising a calculating or optimizing step, the calculating or optimization step taking place such that a performance function F is minimized,
wherein -
F = min ( ∑ i G V , i ( N Ist ( i ) - N Soll ( i ) ) 2 + ( G Z , i ( Z Ist ( i ) - Z Soll ( i ) ) 2 ) ) , and wherein Nactual(i) indicates the actual magnification of the spectacle lens at the i-th evaluation point, Ndes(i) indicates the desired magnification of the spectacle lens at the i-th evaluation point, Gv,j indicates the weighting of the magnification of the spectacle lens at the i-th evaluation point, Zactual(i) indicates the actual distortion of the spectacle lens at the i-th evaluation point, Zdes(i) indicates the desired distortion at the i-th evaluation point, Gz,j indicates the weighting of the distortion at the i-th evaluation point.
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44. A system for producing a spectacle lens while taking into account a magnification and/or a distortion of the spectacle lens, which is designed for correcting a refraction deficit of an eye and has at least a first object-side and a second eye-side surface, wherein the system comprises:
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collecting devices for collecting target data of a spectacle lens; and calculating and optimizing devices for calculating and optimizing at least one surface of the spectacle lens, the calculation and optimization respectively taking place such that a performance function F is minimized, wherein and wherein Nactual(i) indicates the actual magnification of the spectacle lens at the i-th evaluation point, Ndes(i) indicates the desired magnification of the spectacle lens at the i-th evaluation point, Gv,j indicates the weighting of the magnification of the spectacle lens at the i-th evaluation point, Zactual(i) indicates the actual distortion of the spectacle lens at the i-th evaluation point, Zdes(i) indicates the desired distortion at the i-th evaluation point, Gz,j indicates the weighting of the distortion at the i-th evaluation point.
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Specification