求翻译：光限制(optical limiting）是一种基于非线性光学效应的特殊的光开关特性，其原理如下：在弱光入射时，透射光强随入射光强的增加而线性地增加，具有很高的线性透射率；当入射光强增加到一定值时，透射光维持在一个较低的水平，不随入射光强的增加而增加，这时透射率变成零。光限制开关的特性曲线与普通开关的特性曲线的比较见图6.1。具有光学限制特性的开关器件称为光限制器（optical limiter）。其功能 类似于电子学的限幅二极管。是什么意思？

Optical confinement (optical limiting) is a special optical switching based on nonlinear optical effect, the principle is as follows: in low light incidence, the transmitted light intensity linearly increased with the increase of light intensity, with high linear transmission rate; when light intens

Optical restriction (optical limiting) is a non-linear optical effects based on the specific characteristics of the optical switch, its operation is as follows: In low-light into a beam, with light transmission into the light intensity increases linearly with a very high increase in linear transmiss

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Light limit (optical limiting) is a based on Nonlinear optical effect of special of light switch characteristics, its principle is as follows: in weak light incident Shi, transmission light strong with incident light strong of increased and linear to increased, has is high of linear transmission rat

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