A surface contour measuring machine is described which can measure general aspheric or axi-symmetric aspheric surfaces repeatably to .000005 inches or better in most cases. The computer system which controls the measuring machine and which performs the data analysis is discussed. Aspheric production applications are shown in which the measuring machine plays a vital role.
"A High Accuracy Surface Contour Measuring Machine", Proc. SPIE 0171, Optical Components: Manufacture and Evaluation, (4 April 1979); doi: 10.1117/12.957049; https://doi.org/10.1117/12.957049