Super-torus astigmatic glasses lens

An astigmatism and toroidal technology, applied in the field of spectacle lenses, can solve the problem of unequal thickness of the edges of astigmatic spectacles, and achieve the effect of improving imaging quality

Inactive Publication Date: 2006-01-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an astigmatism spectacle lens whose astigmatism surface is a toroidal surface, thereby solving the problem of unequal thickness at the edge of the astigmatism spectacle lens and improving its imaging quality

Method used

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  • Super-torus astigmatic glasses lens
  • Super-torus astigmatic glasses lens
  • Super-torus astigmatic glasses lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A toroidal myopia lens with astigmatism, the inner surface is taken as the astigmatism surface, and its requirement is -4.50DC axial 0°+-6.0DC axial 90°, and the outer diameter is Φ70 mm, and the requirement is - The radius of curvature in the direction of 4.50DC is used as the radius of rotation, and the curvature in the direction of -6.0DC is taken as the vertex curvature of the basic curve expressed by the following formula, the formula is

[0020] z = cy 2 1 + 1 - ( 1 + k ) c 2 y 2 a 1 y 4 ...

Embodiment 2

[0026] Embodiment 2: A toroidal hyperopia lens with astigmatism, the inner surface is taken as the astigmatism surface, the requirement is -2.00DC axial 0°+-1.00DC axial 90°, the outer diameter is Φ70 mm, the requirement is - The radius of curvature in the direction of 2.00DC is used as the radius of rotation, and the curvature in the direction of -1.00DC is taken as the vertex curvature of the basic curve expressed by the following formula, the formula is

[0027] z = zy 2 1 + 1 - ( 1 + k ) c 2 y 2 a 1 y 4 ...

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Abstract

A supertoric astigmatic glass piece is characterized by that with light shaft as the shaft Z the astigmatic surface is got by the basic curve rotating round a straight line parallel to shaft Y and crossed with shaft Z. The said basic curve is the curve crossed by the astigmatic surface and Y-Z panel, expressed in a formulary, in which c expresses the curvature of curve top, a1, a2, a3, a4, a5 are factors of curve high-order term, k is the quadratic curve constant. This invention esses up uneven thickness of the edge of glass pieces to be thinner, and increases quality of image, not influencing the measurement to the basic degrees and astigmatic degrees of glass blocks.

Description

technical field [0001] The invention relates to an spectacle lens, in particular to an astigmatism spectacle lens whose astigmatism surface is a toroidal surface. By designing the shape of the astigmatism surface, the uneven thickness around the lens is reduced and the image quality of the lens is better. Background technique [0002] The two orthogonal directions of the astigmatism surface of the traditional astigmatism spectacle lens are circular arcs. Because the curvature radii of the two arcs are inconsistent, the edge of the spectacle lens is unequal in thickness. As the degree of astigmatism deepens, this unequal thickness A sharp increase, which we don't want. Contents of the invention [0003] The object of the present invention is to provide an astigmatism spectacle lens, the astigmatism surface of which is a toroidal surface, so as to solve the problem of unequal thickness at the edge of the astigmatism spectacle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/02
Inventor 郭培基余景池
Owner SUZHOU UNIV
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