摘要
当用两块平板玻璃制作出的空气劈尖顶角发生变化时 ,应用 CCD可观察到劈尖表面移动的干涉条纹。移过某一点的干涉条纹数决定劈尖项角的变化。若劈尖项角的变化是由金属受热膨胀引起的 ,则可导出金属受热膨胀的绝对伸长量与移过的条纹数之间的关系 ,并通过它计算金属的线胀系数。通过对黄铜棒的测量 。
When the angle of an air wedge which is formed by two flat glass plates is changed,the moving interference fringes would be observed by means of CCD.The number of interference fringes through a certain point is determined by the variation of wedge angle which is due to the expansion of the heated metal.The relation between the absolute extension of the heated metal and the number of moving fringes could be determined and it could determime the metal's coefficient of linear expansion.The experiment measuring yellow copper verifies the feasibility of the method.
出处
《光学技术》
CAS
CSCD
2001年第4期383-384,共2页
Optical Technique
关键词
干涉
干涉条纹
线胀系数
CCD
金属
interference of light
interference fringes
linear expansion coefficient
CCD
