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Production method of progressive additional high-grade resin lens

A progressive multifocal, resin lens technology, applied in glasses/goggles, optics, instruments, etc., can solve the problems of inability to reflect technical indicators, insufficient product design capabilities, and lag in research on progressive multifocal lens technology. The effect of improving the output qualification rate and reducing the cost of mold use

Inactive Publication Date: 2014-01-01
林金松
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Problems solved by technology

[0003] Due to the lag in research on progressive multi-focal lens technology in my country, the lack of product design capabilities, the precision of mold processing technology cannot be guaranteed, and the technical indicators of theoretical design cannot be reflected in products.

Method used

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Embodiment Construction

[0011] The production method of the progressive multi-focal high-grade resin lens is characterized in that it comprises the following steps:

[0012] 1. MDA-based progressive design: Sampling according to the refractive index of the product, ADD luminosity, channel length, and the inner or outer surface of the applied lens: the inner or outer surface of the lens is sampled as: spatially decomposed wavefront images in the central and peripheral areas The area where the difference reaches ± 20 from far to near; the distance between the posterior apex and the center of eye rotation is 27 mm, and the inclination of the visual field is 12 degrees; 2.0 mm; the beginning position of the progressive area above the MRP is 2.0 mm; the end position of the progressive area below the MRP 12.0 mm.

[0013] 2. Design of CNC machining and cutting scheme: CNC machining, cutting and grinding allow certain focal power changes in the far and near vision areas, which widens the gradient area of ​​...

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Abstract

The invention relates to a production method of a progressive additional high-grade resin lens. The method is characterized by comprising the steps of: 1) progressive design of MDA; 2) design of a numerical control processing cutting scheme; and 3) temperature deformation self-leveling. The digital grinding process involved in the invention ensures that a lens die can realize a theoretical design precision, the self-leveling process greatly enhances the die surface strength, the service life of the die can be 5 times that of an original ordinary lens die, and the use cost of the die is lowered by 50%. The qualified rate of the output formed by the die is greatly improved.

Description

technical field [0001] The invention relates to a production method of a progressive multi-focus high-grade resin lens. Background technique [0002] Progressive Additional Lens (Progressive Additional Lens), also known as a progressive lens, an ideal progressive lens must meet at least three basic requirements: 1. The effective visual area as large as possible (far-sighted area, near-sighted area, and gradient area); Possibly high near vision area (that is, the gradient area should be as short as possible); three easy-to-adapt aberrations (soft aberration changes). The superior product performance of progressive multi-focal lenses has attracted more and more attention of Chinese consumers, especially high-performance, high-grade, high-precision products have attracted much attention. According to the survey, there are currently 400 million people wearing glasses in our country. Among the young students, 80% of college students, 65.5% of middle school students and 17.5% of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06
Inventor 林金松
Owner 林金松
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