第9章 激光测振技术.pdf

激光测振技术 激光干涉基础 S O E 两束光波 2 E 1 E  A cos(2ft ) 1 1 1 E  A cos(2ft  ) 2 2 2 H 合成光波 E E E A cos(2 ft  ) A cos(2 ft  ) 1 2 1 1 2 2 Shanghai Jiaotong University - Engineering Mechanics Experimental Ceneter 激光干涉基础 光强分布 E  E E  A cos(2ft ) cos(2   A ft  ) 1 2 1 1 2 2 2 2 2 2 2 I  E  A cos (2ft )  A cos (2ft  )  1 1 2 2 2A cos(2ft )A   1 1 2 cos(2 ft  ) 2 2 2 2 2  A cos (2 ft  )  A cos   (2ft  )  1 1  2 2 A A cos(4 ft   ) A A cos(  ) 1 2 1 2 1 2 1 2 低频分量，且与物体表面的状态有关 Shanghai Jiaotong University - Engineering Mechanics Experimental Ceneter 激光测量的类型 激光全息方法 云纹干涉 电子散斑干涉技