因此在实际测试中，应当优先选择透射光照明，尽可能少用反射照明，而且应尽可能避免背景的干扰。
So, when it comes to practical application, background lighting should be chosen instead of reflection lighting, also interference coming from background should be reduced to minimum level.
本文研究了透射式能见距离测量仪所用激光器的发射能量的优化选择。
Optimized choice of emitting energy of lasers in transmission detection instrument for visual range was studied.
光学性能：根据需要，中空玻璃的基片可选择不同产品灵活组合，以达到需要的太阳光透射率和反射率。
Optical performance: Various glass substrates can be used for IGU to meet the request of sunlight transmission and reflection.
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