The manufacturing method of large base curved free-form surface sunglasses

Abstract

The invention provides a manufacture method of large-base-curve free-form surface sunglasses; the made sunglasses are highly comfortable and have perfectly matched base curve with that of a glasses frame; a multifocal lens is constructed from the prospective of gradient focal power so that the lens includes three regions, wherein the center of the lens is a center fixed-focus region, a gradient region is circularly formed from the center fixed-focus region to the perimeter, and a circular fixed-focus region is arranged outside the gradient region, wherein focal power of the gradient region of the lens is gradient from the outer edge of the center fixed-focus region to the inner edge of the edge fixed-focus region according to a set focal power polynomial along a meridian and horizontal axis of the lens; a three-dimensional right-angle coordinate system is established by using the human eye center as an origin; rises of all points on the rear surface of the gradient region are calculated sequentially from inside to outside for the gradient region according to the principle that tangent planes of edge points of adjoining gradient regions are superposed; finally, a rear surface of the lens is generated according to the rise data of all points of the rear surfaces of the fixed-focus regions and gradient region.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a method for manufacturing large base curved free-form surface sunglasses. Background technique [0002] Sunglasses are used to eliminate unnecessary radiation bands that may damage the eyes, reduce the intensity of ambient light entering the eyes; provide clear and comfortable functional vision; maintain normal color vision, and can quickly and accurately identify traffic lights; maintain Amount of dark adaptation or night vision. In addition to reducing the radiation intensity of visible light, sunglasses can also reduce ultraviolet and infrared radiation. When people choose sunglasses, they should not only consider the external style of the sunglasses, but also pay attention to their internal quality, and choose sunglasses correctly according to different environments and uses, so as to avoid improper choices that affect vision health and personal safety. [0003] Myo...

AI Technical Summary

Problems solved by technology

The advantage of choosing to wear a layer of sunglasses on top of myopia glasses is that it is simple, but the disadvantage is that the lenses are heavy

The double-layer lens is cumbersome, and it is easy to shift or fall off during strenuous exercise

The advantage of wearing a pair of sunglasses with optical power is that it is relatively light, beautiful, and easy to fix. The disadvantage is that for high myopia, the edge of the sunglasses with this height is thicker, and the base curvature of the lens cannot perfectly match the curvature of the frame. Moreover, the edge prism aberration of the lens is large and the comfort is not high

The edge of the large-base curved lens produced by the traditional method is relatively thick, which seriously affects the aesthetics of the glasses, and is not easy for the wearer to accept. Moreover, due to the large curvature, the edge of the lens will produce serious prism phenomenon and aberration, and there will be blurred vision when wearing it. Clear and vomiting, dizziness and other phenomena

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