Abstract

Various methods of fabricating aspherical surfaces are described in detail. In the method of successive approaches by tools, the figuring procedures and the measuring apparatus were studied. In order to get higher figuring efficiency, a grinding machine consisting of a turntable and a profile tracer with a tool was developed. For the fabrication of conic sections, the tracing arm was operated with a linkage. A tracing system by means of a cam, however, was found to be most satisfactory for general aspherical surfaces. The grinding of a deformed thin plate was also found to be an effective technique when the desired surface was nearly in plane.

© 1963 Optical Society of America

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