【摘要】 将激光器的工作频率稳定在Fabry－Perot标准具的本征模上，当标准具受到轴向应力作用时，应变可利用拍频技术进行测量，应力用力传感器测量即可高精度测得Fabry－Perot材料的弹性模量．更多还原

【Abstract】 The frequency of laser is locked in the eigen mode of Fabry-perot etalon. Thestrain of etalon in the direction of axis will change the frequency of laser. This change can be measuredby frequency beat technique. The force put on the etalon in the direction of axis can be measuredby using the force sensor. So the elastic modulus of the material from which the etalon ismade can be obtained.更多还原