Please choose either an autocollimator or a laser interfeometer (homodyne or heterodyne).
Carry out a research on the working principles, detailed description of key components of the equipment you have chosen and industrial application. You need to also search related YouTube videos.
Write a brief research report on it. To get A, your report should have at least 5 related photos, links of 3 YouTube videos as well as the working principles, detailed descriptions of key components of the equipment and an industrial application summary. I expect a 7-10 pages long report including photos you have identified.