The technician can manipulate the lens to check the light transmission from every Angle and determine whether a part of the surface requires additional polishing.

技师能够从各个角度熟练控制镜头来检查光传导并判断镜头表面是否需要更多打光。

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The transmission characteristic of hollow duct was described by using a ray-tracing method and compared with the lens duct.

用光线追迹方法描述了空心导管的传输特性，并与透镜导管做了比较。

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The several dynamic focus systems are analyzed. The transmission formulas of laser through them and the way to define the optical lever ratio and the focus of lens are given.

分析了几种不同的动态聚焦系统的特点，给出了激光束通过该系统的变换公式以及光杠杆比和透镜焦距的确定方法。

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The lens of the eye also becomes denser and yellower, decreasing the transmission of light, so that more light is often needed to see.

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