单缝衍射法测量金属线胀系数装置的研究

摘要

利用夫琅禾费单缝衍射中衍射条纹对缝宽的线性放大作用，设计了单缝衍射法测量金属线胀系数的实验装置。采用可控比例杠杆，使衍射狭缝随金属伸长按一定的比例变宽，扩大了测温范围。%T he apparatus for measuring metal linear expansion coefficient by means of single-slit diffraction was designed according to the theory of single-slit diffraction .The apparatus adopted con-trollable ratio leverage ,so that it could work in a wide temperature range because the width of the sin-gle-slit was proportional to the expansion of the metal .