Spectacle lens evaluation method and evaluation device
First Claim
1. A method of evaluating a spectacle lens, comprising the steps of:
- finding the optical properties of each position on a spectacle lens relating to the principal ray, or beam comprising the principal ray, that passes through the center of rotation of the eyeball from the three-dimensional data of the spectacle lens, the parameters for the state in which the spectacle lens is worn comprising distance from the surface of said spectacle lens on the eye side to the center of rotation of the eyeball as a parameter, and the material parameters of the spectacle lens comprising the index of refraction of said spectacle lens as a parameter; and
evaluating the spectacle lens.
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Accused Products
Abstract
The optimum optical properties of a spectacle lens that correspond with the state in which the spectacle lens is worn by respective wearers are found and evaluated. Three-dimensional shape data of the spectacle lens comprising the determinations of a three-dimensional determination device that determines the surface shape f the spectacle lens, parameters of the state in which the spectacle lens is worn, such as the distance from the center of rotation, and material parameters, such as the refractive index of the spectacle lens, are input to a computer that calculates optical properties of a spectacle lens. An optical model of the state in which the spectacle lens is worn is constructed by the computer based on these input data and optical properties at each position on the spectacle lens relating to the principal ray, or the beam comprising the principal ray, in the direction of the line of vision that passes through the center of rotation of the eyeball is calculated by this optical model and the calculation results are output to a printer, etc.
57 Citations
18 Claims
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1. A method of evaluating a spectacle lens, comprising the steps of:
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finding the optical properties of each position on a spectacle lens relating to the principal ray, or beam comprising the principal ray, that passes through the center of rotation of the eyeball from the three-dimensional data of the spectacle lens, the parameters for the state in which the spectacle lens is worn comprising distance from the surface of said spectacle lens on the eye side to the center of rotation of the eyeball as a parameter, and the material parameters of the spectacle lens comprising the index of refraction of said spectacle lens as a parameter; and
evaluating the spectacle lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 18)
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12. A spectacle lens evaluation device comprising:
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a three-dimensional determination device that determines the surface shape of the spectacle lens;
a computer that calculates the optical properties of the spectacle lens from various data of said spectacle lens; and
an output device that displays the results of evaluating optical properties of the spectacle lens that have been calculated by the computer, wherein the above-mentioned computer has a three-dimensional shape data input part that inputs data relating to the three-dimensional shape of the spectacle lens comprising the determination of said 3-dimensional determination device, an input part that inputs parameters of the state in which the spectacle lens is worn comprising the distance between the surface of said spectacle lens on the eye side and the center of rotation of the eyeball as a parameter, and a material parameter input part that inputs material parameters of the spectacle lens comprising the refractive index of said spectacle lens as a parameter, as well as a processing part that calculates optical properties at each position on the spectacle lens relating to the principal ray, or the beam comprising the principal ray, that passes through the center of rotation of said eyeball based on data from these input parts. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification