Lens optical film products

Abstract

The invention discloses a lens optical film product, at least comprising plastic layers and a color changing layer wherein the color changing layer is attached between the two plastic layers. One of the polarization layer, UV absorbing material layer or dye layer or the three arbitrary combination can be attached between the between the two plastic layers. The color changing layer is sandwiched between the two plastic layers using the attaching technique, rather than the color changing layer is coated on the plastic layers using staining technique, so as to avoid unevenly dyeing and prevent the color changing layer from falling off. Moreover the color changing layer is attached with the plastic layer after independently moulding, thus the color changing time can be well controlled to prevent the color changing time from being slow.

Description

technical field [0001] The invention relates to an optical product, especially a lens optical film product. Background technique [0002] Spectacle lenses are a typical optical product, and in this field, manufacturers always hope to increase the performance of the product, such as color-changing performance, polarizing performance, UV protection performance, and more colors. All of the above characteristics are realized by adding corresponding film layers. However, there are certain difficulties in its manufacturing and handling, and the cost is high, and the above characteristics may weaken or even disappear after being scratched or worn for a long time. [0003] Afterwards, some early manufacturers used color-changing dye technology on the surface of plastic lenses (TAC layer), such as patents such as U.S. Pat. No. 5,130,353 or U.S. Pat. No. 5,185,390. Other compounds that can cause discoloration, so that a layer of discoloration layer 2' is coated on the surface of the...

AI Technical Summary

Problems solved by technology

However, for this manufacturing process of coating the color-changing layer 2' outside the TAC layer 1', the problem of uneven dyeing often occurs due to the uneven thickness of the dyed particles. To keep the lens from changing color for a long time, it is necessary Precise control of dye uptake and is more difficult and costly to practice

In addition, when there is a difference in the required discoloration time, the requirement cannot be met, and the discoloration time is slow

[0004] Furthermore, general lenses need to have a certain standard of UV protection, and some lenses also need to add polarized light and other properties. Easy to fall off

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