When the angle of incidence is 45 degrees, the beam-combination mirror is designed to transmit long wavelength laser beams and the diode beams reflected at 90 degrees will be used to calibrate it.
合束镜设计用于45度入射时，传输长波的激光束，并利用90度反射的二激光光束来校准它。
When the angle of incidence is 45 degrees, the beam-combination mirror is designed to transmit long wavelength laser beams and the diode beams reflected at 90 degrees will be used to calibrate it.
合束镜设计用于45度入射时，传输长波的激光束，并利用90度反射的二激光光束来校准它。
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