Design method of free-form surface glasses based on wave-front technology

A design method and technology of curved surfaces, applied in the field of vision correction, can solve the problems of failing to give lens fitting results, no correction effect, etc.

Inactive Publication Date: 2013-02-06
天津宇光光学有限公司
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Problems solved by technology

This patent does not solve the above problems: when looking directly, the object can be clearly seen only within the 1° field of view, and there is no correction effect if it deviates from this area; similarly

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  • Design method of free-form surface glasses based on wave-front technology
  • Design method of free-form surface glasses based on wave-front technology
  • Design method of free-form surface glasses based on wave-front technology

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Embodiment Construction

[0039] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] A design method for free-form glasses based on wavefront technology, such as figure 1 shown, including the following steps:

[0041] Step 1: Substitute the length data of each part of the eye axis into the Gull strand-Le Grand eye optical model;

[0042] In this step, use conventional means (such as medical ultrasonic thickness gauge) to measure the length of each part of the eye axis to the eye axis, and obtain the length data of each part of the eye axis: the length of the anterior chamber, lens, and vitreous body in the direction of the eye axis thickness.

[0043] This step is just to substitute the above data into the Gull strand-Le Grand eye optical model;

[0044] Step 2: Use the corneal surface curvature and corneal topography data to replace the cornea in the Gullstrand-Le Grand eye optical model to simulate the corneal surfa...

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Abstract

The invention relates to a design method of free-form surface glasses based on a wave-front technology, which has the technical characteristics that length data of each part of an eye axis is substituted into an eye optical model; a cornea surface curvature and a corneal topography data replace the eye model; wave-front aberration data of actual human eyes is converted into a corresponding value under photopic vision; an individualized eye model which accords with an actual human eye visual property is established; a lens is arranged in front of the individualized eye model; the lens and the individualized eye model are considered as a uniform lens-eye optical system and a certain visual field angle is arranged for the system; a plurality of structures with different angles are arranged for the lens-eye optical system; and the free-form surface glasses according with an individual eye visual property, and the diopter and the structural parameters thereof are calculated. The free-form surface lens obtained by the design method disclosed by the invention, low-order aberration of the eyes can be corrected and high-order aberration can be better corrected; and the design method has the advantages of simplicity and convenience for designing, objectiveness and accuracy, and high precision.

Description

technical field [0001] The invention belongs to the technical field of vision correction, in particular to a design method of free-form glasses based on wavefront technology. Background technique [0002] Since the human eye has a complex refractive system, in addition to low-order aberrations such as defocus and astigmatism, there are also various irregular high-order aberrations, such as spherical aberration, coma, trefoil aberration, etc., which are also Affects the visual quality of the human eye. Studies have shown that high-order aberrations cannot be corrected effectively with sphero-cylindrical lenses alone. In addition, although aspheric lenses have entered the market, the existing aspheric lenses are mainly used to change the physical shape of glasses, and do not have the ability to correct high-order aberrations of the human eye. We have also proposed aspheric glasses that can correct spherical aberration and astigmatism (Chinese Science: Technical Science, 2012...

Claims

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Application Information

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IPC IPC(8): G02C7/02
Inventor 王肇圻孔强李蕊何远清刘永基孔祥鸣
Owner 天津宇光光学有限公司
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