合束镜是一种半透反射镜，它将两种（或多种）波长的光线分别通过透射和反射的方法合成到一条光路上。
The green laser is a semi-reflection mirror. It combines the light beams of two (or more) wavelength into one direction by transmission and reflection.
合束镜是一种半透反射镜，它将两种（或多种）波长的光线分别通过透射和反射的方法合成到一条光路上。
The green laser is a semi-reflection mirror. It combines the light beams of two (or more) wavelength into one direction by transmission and reflection.
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