基于线阵CCD的迈克尔逊干涉仪测量金属丝的弹性模量

Measuring Elasticity Modulus of Wire with Michelson Interferometer by Using Linear CCD

对现有迈克尔逊干涉仪予以简单改造,通过在金属丝上持续而均匀加力的变化引起金属丝细微伸长进而带动移动镜移动,从而引起光屏上干涉圆环数目的变化;通过对干涉圆环的自动精确记录就可以实现对金属丝微小伸长量的测量,提出了一种用线阵CCD作为光电传感器件捕捉干涉圆环的光强信号,再将电信号进行模数转换。采取USB接口与微机接口,用C++语言编写程序设计了一种新型的干涉圆环自动计数软件。将这种计数方法与金属丝弹性模量的测量结合起来,可以自动得出金属丝的弹性模量,且提供了一种交互性强的友好图形界面。

Reconstructing the Michelson interferometer,the small increase of the length of wire is due to the force acted on the wire,and the change of the length of wire leads to the move of the reflector set on the Michelson interferometer,consequently leads to the change of the number of interference ring.This paper put forward the method of capturing the light signal of interference ring by using linear CCD as light-electricity sensor,and presented the method of transforming electricity analog signals to digital s...