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US 12,607,879 B2Granted
Performance evaluation method for spectacle lens and non-transitory computer-readable storage medium
AssigneeTokai Optical Co., Ltd.
InventorsKeisuke Ota, Hitoshi Miura
Life of this patent
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Abstract
A performance evaluation method for a spectacle lens comprising calculating a change rate of a first component and a change rate of a second component with a computer to calculate at least one of a distortion evaluation value and a shaking evaluation value, the first component being a component in a first direction of a prism refractive index, the second component being a component in a second direction of the prism refractive index, the distortion evaluation value being a value for evaluating a distortion regarding a spectacle lens, the shaking evaluation value being a value for evaluating a shaking regarding the spectacle lens.
Claims6
A method for evaluating and quantifying performance characteristics of a spectacle lens, comprising:
- providing a spectacle lens to be evaluated;
- arranging the spectacle lens in a measurement position corresponding to an orientation for wearing;
- measuring the spectacle lens with a measurement device to produce measurement data;
- and
- providing an evaluation device including a computer having a display, an input, storage means, communications means and control means to evaluate the measurement data;
- wherein the control means sequentially reads a performance evaluation program stored in the storage means, and performs a quantitative evaluation of the performance characteristics of the spectacle lens based on the measurement data obtained by the measurement device by calculating a measured change rate of a first component and a measured change rate of a second component to calculate at least one of a distortion evaluation value and a shaking evaluation value, the first component being a component in a first direction of a prism refractive index, the second component being a component in a second direction of the prism refractive index, the distortion evaluation value being a value for evaluating a distortion regarding a spectacle lens, and the shaking evaluation value being a value for evaluating a shaking regarding the spectacle lens;
- wherein the control means calculates the distortion evaluation value at any point (x, y) of the spectacle lens according to formula (A) stored in the storage means,
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- wherein an X-axis is taken in a horizontal direction (nose-ear direction) as the first direction, and a Y-axis is taken in an up-down direction as the second direction when the spectacle lens is arranged in the measurement position, while Ph is a horizontal prismatic power as the first component that is the prismatic power in the X-axis direction, and Py is a vertical prismatic power as the second component that is the prismatic power in the Y-axis direction;
- wherein the horizontal prismatic power Ph is calculated according to the following formulas,
- Px=(Ato_x−Mae_x)*0.1
- Ato_x=x+{1000+m_CT+CalcUrSag(x,y)}*AtoWx
- Mae_x=x+{1000+CalcOmSag(x,y)}*MaeWx
- wherein the vertical prismatic power Py is calculated according to the following formulas,
- Py=(Ato_y−Mae_y)*0.1
- Ato_y=y+{1000+m_CT+CalcUrSag(x,y)}*AtoWy
- Mae_y=y+{1000+CalcOmSag(x,y)}*MaeWy
- wherein Ato_x and Ato_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis in incident locus LC3, Mae_x and Mae_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis incident locus LC1, m_CT is a thickness at a center of the spectacle lens, and CalcOmSag(x,y) is an amount of sag calculated at a point (x,y) on a front surface of the spectacle lens.
32 more elements
A method for evaluating and quantifying performance characteristics of a spectacle lens comprising:
- providing a spectacle lens to be evaluated;
- arranging the spectacle lens in a measurement position corresponding to an orientation for wearing;
- measuring the spectacle lens with a measurement device to produce measurement data;
- and
- providing an evaluation device including a computer having a display an input storage means, communications means and control means to evaluate the measurement data:
- wherein the control means sequentially reads a performance evaluation program stored in the storage means, and performs a quantitative evaluation of the performance characteristics of the spectacle lens based on the measurement data obtained by the measurement device by calculating a measured change rate of a first component and a measured change rate of a second component to calculate at least one of a distortion evaluation value and a shaking evaluation value, the first component being a component in a first direction of a prism refractive index, the second component being a component in a second direction of the prism refractive index, the distortion evaluation value being a value for evaluating a distortion regarding a spectacle lens, and the shaking evaluation value being a value for evaluating a shaking regarding the spectacle lens,
- wherein the control means calculates the shaking evaluation value at any point (x, y) of the spectacle lens according to formula (B) stored in the storage means,
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- wherein an X-axis is taken in a horizontal direction (nose-ear direction) as the first direction, and a Y-axis is taken in an up-down direction as the second direction when the spectacle lens is arranged in the measurement position, while Ph is a horizontal prismatic power as the first component that is the prismatic power in the X-axis direction, and Pv is a vertical prismatic power as the second component that is the prismatic power in the Y-axis direction,
- wherein the horizontal prismatic power Pa is calculated according to the following formulas,
- Px=(Ato_x−Mae_x)*0.1
- Ato_x=x+{1000+m_CT+CalcUrSag(x,y)}*AtoWx
- Mae_x=x+{1000+CalcOmSag(x,y)}*MaeWx
- wherein the vertical prismatic power Py is calculated according to the following formulas,
- Py=(Ato_y−Mae_y)*0.1
- Ato_y=y+{1000+m_CT+CalcUrSag(x,y)}*AtoWy
- Mae_y=y+{1000+CalcOmSag(x,y)}*MaeWy, and
- wherein Ato_x and Ato_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis in incident locus LC3, Mae_x and Mae_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis incident locus LC1, m_CT is a thickness at a center of the spectacle lens, and CalcOmSag(x,y) is an amount of sag calculated at a point (x,y) on a front surface of the spectacle lens.
31 more elements
A method for evaluating and quantifying performance characteristics of a spectacle lens comprising:
- providing a spectacle lens to be evaluated;
- arranging the spectacle lens in a measurement position corresponding to an orientation for wearing;
- measuring the spectacle lens with a measurement device to produce measurement data;
- and
- providing an evaluation device including a computer having a display, an input, storage means, communications means and control means to evaluate the measurement data;
- wherein the control means sequentially reads a performance evaluation program stored in the storage means, and performs a quantitative evaluation of the performance characteristics of the spectacle lens based on the measurement data obtained by the measurement device by calculating a measured change rate of a first component and a measured change rate of a second component to calculate at least one of a distortion evaluation value and a shaking evaluation value, the first component being a component in a first direction of a prism refractive index, the second component being a component in a second direction of the prism refractive index, the distortion evaluation value being a value for evaluating a distortion regarding a spectacle lens, and the shaking evaluation value being a value for evaluating a shaking regarding the spectacle lens,
- wherein the control means calculates the distortion evaluation value at any point (x, y) of the spectacle lens according to formula (C) stored in the storage means,
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- ∂
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- y
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- C
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- wherein an X-axis is taken in a horizontal direction (nose-ear direction) as the first direction, and a Y-axis is taken in an up-down direction as the second direction when the spectacle lens is arranged in the measurement position, while Ph is a horizontal prismatic power as the first component that is the prismatic power in the X-axis direction, and Pv is a vertical prismatic power as the second component that is the prismatic power in the Y-axis direction,
- wherein the horizontal prismatic power Pi is calculated according to the following formulas,
- Px=(Ato_x−Mae_x)*0.1
- Ato_x=x+{1000+m_CT+CalcUrSag(x,y)}*AtoWx
- Mae_x=x+{1000+CalcOmSag(x,y)}*MaeWx
- wherein the vertical prismatic power Ph is calculated according to the following formulas,
- Py=(Ato_y−Mae_y)*0.1
- Ato_y=y+{1000+m_CT+CalcUrSag(x,y)}*AtoWy
- Mae_y=y+{1000+CalcOmSag(x,y)}*MaeWy, and
- wherein Ato_x and Ato_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis in incident locus LC3, Mae_x and Mae_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis incident locus LC1, m_CT is a thickness at a center of the spectacle lens, and CalcOmSag(x,y) is an amount of sag calculated at a point (x,y) on a front surface of the spectacle lens.
31 more elements
A method for evaluating and quantifying performance characteristics of a spectacle lens comprising:
- providing a spectacle lens to be evaluated;
- arranging the spectacle lens in a measurement position corresponding to an orientation for wearing;
- measuring the spectacle lens with a measurement device to produce measurement data;
- and
- providing an evaluation device including a computer having a display, an input, storage means, communications means and control means to evaluate the measurement data;
- wherein the control means sequentially reads a performance evaluation program stored in the storage means, and performs a quantitative evaluation of the performance characteristics of the spectacle lens based on the measurement data obtained by the measurement device by calculating a measured change rate of a first component and a measured change rate of a second component to calculate at least one of a distortion evaluation value and a shaking evaluation value, the first component being a component in a first direction of a prism refractive index, the second component being a component in a second direction of the prism refractive index, the distortion evaluation value being a value for evaluating a distortion regarding a spectacle lens, and the shaking evaluation value being a value for evaluating a shaking regarding the spectacle lens,
- wherein the control means calculates the shaking evaluation value at any point (x, y) of the spectacle lens according to formula (D) stored in the storage means,
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- ∂
- P
- v
- ∂
- x
- +
- ∂
- P
- h
- ∂
- y
- (
- D
- )
- wherein an X-axis is taken in a horizontal direction (nose-ear direction) as the first direction, and a Y-axis is taken in an up-down direction as the second direction when the spectacle lens is arranged in the measurement position, while Ph is a horizontal prismatic power as the first component that is the prismatic power in the X-axis direction, and Pv is a vertical prismatic power as the second component that is the prismatic power in the Y-axis direction,
- wherein the horizontal prismatic power Pi is calculated according to the following formulas,
- Px=(Ato_x−Mae_x)*0.1
- Ato_x=x+{1000+m_CT+CalcUrSag(x,y)}*AtoWx
- Mae_x=x+{1000+CalcOmSag(x,y)}*MaeWx
- wherein the vertical prismatic power Py is calculated according to the following formulas,
- Py=(Ato_y−Mae_y)*0.1
- Ato_y=y+{1000+m_CT+CalcUrSag(x,y)}*AtoWy
- Mae_y=y+{1000+CalcOmSag(x,y)}*MaeWy, and
- wherein Ato_x and Ato_y are tangents regarding the X-axis and Y-axis respectively, with respect to an optical axis in incident locus LC3, Mae_x and Mae_y are tangents regarding the X-axis and Y-axis, respectively, with respect to an optical axis incident locus LC1, m_CT is a thickness at a center of the spectacle lens, and CalcOmSag(x,y) is an amount of sag calculated at a point (x,y) on a front surface of the spectacle lens.
31 more elements
Dependencies are inferred from the claim text.