1) time after time reflection amplification
多次反射放大
2) multiple reflections
多次反射
1.
The effects of such factors as the multiple reflections,the vertex angles and the diameters of the keyhole on the intensity distribution of .
在假设小孔为圆锥形的基础上,按照几何光学理论,通过跟踪光线在小孔内的多次反射轨迹,对激光深熔焊接小孔内等离子体的反韧致辐射吸收进行了详细研究。
2.
On the assumption of conical keyhole and using geometrical optics theory, a detailed study on Fresnel absorption and multiple reflections on the keyhole wall in deep penetration laser welding of metals was made by tracing a beam light.
在假设小孔为圆锥形的基础上,按照几何光学理论,通过跟踪光线在小孔内的多次反射轨迹,研究了激光在圆锥形小孔孔壁上的多次反射吸收。
3.
The results indicate that multiple reflections are favorable to the increase of depth.
结果表明,由于前沿存在多次反射,使得切割深度增加。
3) Multiple reflection
多次反射
1.
Through multiple reflections of a laser beam between a CD and a parallel mirror, a laser beam displacement caused by the CD vibration can be enlarged, so that the measurement of the amplitude is simplified.
该方法通过激光束在光盘与平面镜之间的多次反射 ,将光盘振动引起的光偏移量放大 ,从而简化了光盘振幅的测量。
6) multiple echo method
多次反射法
1.
Based on analysis of the microstructures and micro-defects of W-Cu alloy prepared by sintering and infiltration process, a multiple echo method have been carried out to do ultrasonic examination for W-Cu alloy.
在分析了CuW材料的组织及缺陷特点后,认为多次反射法比较适合,据此对探头频率、对比试块的结构、探伤灵敏度等参数和评价方法进行了研究。
补充资料：多次反射
多次反射
超声学术语。又称“多重反射”“多重回声”。超声脉冲在反射界面与换能器表面之间往返多次反射的现象。在声像图和回声图上可显示为2、3…多次距离相等、逐渐减弱的图像或回波波高。换能器与反射界面愈靠近，反射的重复次数愈多；界面声阻抗失配愈大，则反射信号愈强。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条