Precision molded-glass optics.
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.
Maschmeyer
R O
RO
Corning Glass Works, Research & Development Laboratories, Corning, New York 14831, USA.
Andrysick
C A
CA
Geyer
T W
TW
Meissner
H E
HE
Parker
C J
CJ
Sanford
L M
LM