Results achieved in high-precision molding of glass lenses are reported. The work concentrated on a 0.4-N.A. 8-mm diam lens with spherical surfaces. The glass is a specialty glass composition of index (d-line) 1.604 and Abbe number 50. Typical design tolerances which have been achieved in the molded glass lenses include relative surface figure replication of 0.06 µm, thickness and diameter tolerances of ±10 µm, wedge of <10-3 rad, birefringence of less than one one-hundredth wave, and index homogeneity in the sixth decimal place. These results are directly applicable to molding precision glass aspheric lenses of similar tolerances.
© 1983 Optical Society of America
Richard O. Maschmeyer, Chester A. Andrysick, Thomas W. Geyer, Helmuth E. Meissner, Charles J. Parker, and L. Michael Sanford, "Precision molded-glass optics," Appl. Opt. 22, 2410-2412 (1983)