Precision molded-glass optics |
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Authors: | Maschmeyer R O Andrysick C A Geyer T W Meissner H E Parker C J Sanford L M |
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Affiliation: | Corning Glass Works, Research & Development Laboratories, Corning, New York 14831, USA. |
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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. |
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