根据光散射和反射的理论，测量仪参数被选择以优化系统。

The proper parameters according to the theory of light scattering and reflection are chosen to optimize the measurement instrument.

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根据光散射和反射的理论，测量系统参数被选择以优化系统。

The measuring system parameters according to the theory of light scattering and reflection are chosen to optimize the system.

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对光管进行部分镀高反膜尽可能消除散射光对光吸收系数测量的影响，从而提高了系统的精度。

The system also could decrease the effect of scattering light on absorption coefficient measurement by partly plating highly reflective membrane, so that we can improve the precision of the system.

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