The grinding of aspheric molds in hard materials on a CNC lathe is discussed, as well as a stylus technique to measure the shape of these molds. Optical measurements of N.A. = 0.45 lenses replicated with these molds give a rms OPD of <0.030 wavelength at 780 nm.
© 1985 Optical Society of America
Derk Visser, Tom G. Gijsbers, and Rob A. M. Jorna, "Molds and measurements for replicated aspheric lenses for optical recording," Appl. Opt. 24, 1848-1852 (1985)