A Method for Polishing SPDT Aspheric Surfaces

Abstract

Single point diamond turning is a cost effective method of making aspheric optics for use in the infrared. Because the technique leaves fine grooves or tool marks in the surface of the turned part, diamond turned aspherics are not generally suited for use in the visible spectral region without post polishing of the turned surface. If this polishing is not done the surface exhibits a rainbow-like scattering that is objectionable in the final optical system.