【摘 要】
：
一、何谓光致色变光致色变一词是1950年由Y Hirsh—berg最先使用的。以波长λ_1的光照射某物质,使其色彩发生可逆的显著变化,其逆过程可以由波长λ_2的光或自然热效应完成,
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一、何谓光致色变光致色变一词是1950年由Y Hirsh—berg最先使用的。以波长λ_1的光照射某物质,使其色彩发生可逆的显著变化,其逆过程可以由波长λ_2的光或自然热效应完成,这种现象即为光色互变现象。如果照射光的λ_1是紫外域波长,则λ_2一般为可见域波长。相反,如果λ_1是可见光波长,则λ_1就是紫
First, what is photochromic? The term photochromic was first used by Y Hirsh-berg in 1950. Irradiation of a substance with a wavelength of λ_1 causes its color to undergo a reversible and significant change. The reverse process can be accomplished by light or natural thermal radiation at a wavelength of λ_2. If λ_1 of the illumination light is the UV-domain wavelength, λ_2 is generally the visible-region wavelength. Conversely, if λ_1 is the wavelength of visible light, λ_1 is violet
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