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Office using gradual-change multi-focus lens

A lens and prism technology, applied in the field of optical lenses, can solve problems such as unsatisfactory visual effects and inability to meet the needs of middle distances

Active Publication Date: 2009-01-28
上海三联(集团)有限公司吴良材眼镜公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of glasses has unsatisfactory visual effects when viewed at medium and short distances, and cannot meet the increasing needs of medium distances such as watching computer screens and handling office affairs.

Method used

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  • Office using gradual-change multi-focus lens
  • Office using gradual-change multi-focus lens
  • Office using gradual-change multi-focus lens

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] The main aberration of the lens is spherical aberration. For a thin lens, the longitudinal spherical aberration can be determined by the following formula:

[0022] l'-l' m =1 / 8.y 2 l' 2 f 2 (au 2 +buv+cv 2 +d)

[0023] In the formula, l' represents the focal length of light near the central axis of the lens; l' m Indicates the focal length of the edge light of the lens; y indicates the diameter of the lens; F indicates the diopter of the lens; u is the form factor, and a, b, c, d, v are conjugate (or divergent) factors;

[0024] The form factor can be calculated by the following formula:

[0025] u = R 1 + R 2 R 1 - R 2

[0026] In the formula, R 1 is the radius of the ou...

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Abstract

The invention provides a morphing multi focus glass, and the traditional multi focus glass is designed for far. The morphing multi focus glass provided by the invention includes the middle distance area on the top of glass, the close distance area on the bottom of glass, the morphing area between the middle distance area and the close distance area, and the disturbance area on the two sides of glass. The diopter of middle distance area F middle=F1+F2, F1 is the diopter of outcurve, F2 is the diopter of incurve, the diopter of close distance area F close=F middle +ADD, ADD is adding luminosity, and the diopter of outcurve is 2.00Ds. The diopter of middle distance area adds certain diopter according to the adding luminosity, the glass also includes triple prism bottom downward, and the addition factor of triple prism is 0.33D / Add. The morphing multi focus glass is special designed for middle and close distance, and it has wide video and wide screen, and fits for processing the business work.

Description

technical field [0001] The present invention relates to an optical lens, in particular to a progressive multi-focal lens suitable for office use. Background technique [0002] When people reach middle age, due to the decline in the accommodation function of the eye lens, it will be difficult to see close-up objects. From an optical point of view, the variable focus of the eyeball optical system moves forward, which cannot cope with the best reading distance of 0.33 meters. At this time, it is necessary to obtain an external convex lens to change the convergence of light so that the visual focus is within the normal range. This is the effect of ordinary reading glasses. [0003] However, such a phenomenon occurs when wearing traditional reading glasses. When the user reads, he needs to wear the reading glasses, but when looking at a distance temporarily, he needs to take off the reading glasses to see clearly. When the user needs to frequently change the viewing distance (s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/10G02B5/04
Inventor 王兆岗林培任何志聪李豫南蓝金康陆建龙俞铭元洪燕
Owner 上海三联(集团)有限公司吴良材眼镜公司
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