| 摘要 |
PURPOSE:To improve the visual recognizability by providing a reflection film, which selectively reflects visible rays in the wavelength area of the same color as a dyed plastic lens, on the surface of this plastic lens. CONSTITUTION:The reflection film which selectively reflects visible rays in the wavelength area of the same color as the dyed plastic lens is provided on the surface of the plastic lens. It is preferable that the plastic lens is immersed in the solution of a disperse dye to dye the plastic lens. Though it is preferable that a monochromatic disperse dye is used as the dye, a dye where two or more kind of disperse dye are prepared can be used. it is preferably that the dyeing density is 30-95% at the peak of light absorption. Though a zirconium oxide is preferable as a material for high-refractive index film used in the reflection film, a titanium oxide, a cerium oxide, an indium oxide, a neodymium oxide, a tantalum oxide, or the like can be used as this material. Thus, objects and scenes can be seen in a natural color tone and excellent visual recognizability is attained.
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