title: Precision molded-glass optics.
abstract: 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 Aim, thickness and diameter tolerances of A+/-10 Am, 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.
authors.affiliation: Corning Glass Works, Research & Development Laboratories, Corning, New York 14831, USA.
authors.forename: R O
authors.initials: RO
authors.lastname: Maschmeyer
authors.forename: C A
authors.initials: CA
authors.lastname: Andrysick
authors.forename: T W
authors.initials: TW
authors.lastname: Geyer
authors.forename: H E
authors.initials: HE
authors.lastname: Meissner
authors.forename: C J
authors.initials: CJ
authors.lastname: Parker
authors.forename: L M
authors.initials: LM
authors.lastname: Sanford