摘要
分析了在洛埃镜干涉装置中等效双狭缝间距变化对干涉条纹密度的影响。导出了钢丝因受力引起的绝对伸长量与干涉条纹密度变化之间的关系 ,并通过它计算了钢丝的杨氏弹性模量。结果表明 ,激光干涉法不仅比光杠杆法测量的量要少 ,而且用该方法通过测微目镜测条纹的位置要比光杠杆法通过望远镜对标尺读数精确 。
In the Loyd's mirror experiment. The change of the slit separation to effect of density of interference fringes is analyzed. The relation between the absolute extension of the forced steel wire and the change of density of interference fringes could be deduced and it could calculate Young's elastic modulus of steel wire. It is verified through practice the method is feasible and more accurate than the method of light lever.
出处
《光学技术》
CAS
CSCD
2002年第2期183-184,共2页
Optical Technique
关键词
杨氏弹性模量
激光干涉
干涉条纹
洛埃镜
钢丝
young's elastic modulus
laser interference
interference fringes
lloyd's mirror
