Method of molding optical lenses

Details Method of molding optical lenses Method of molding optical lenses

1986-05-21

1988-04-19

Bashore, S. Leon

Glass manufacturing

Processes

Sequentially forming, reheating, and working

65103, 65104, C03B 2300

Patent

active

047387033

ABSTRACT:
Optical lenses high in configurational accuracy with smooth surfaces are press molded in a carefully finished, polished and properly dimensioned mold preferably in a non-oxidizing atmosphere. The molding operation includes placing a quantity of glass having an internal viscosity of at least about 10.sup.6 poises in such a mold while maintaining the mold at a temperature at least equal to the glass transition temperature and thereafter passing the glass into a lens of predetermined configuration at a pressure of at least 100 Kg/cm.sup.2. Performing procedures are also disclosed.

REFERENCES:
patent: 4046545 (1977-09-01), Sanford et al.
patent: 4168961 (1979-09-01), Blair
patent: 4391622 (1983-07-01), Alting et al.
Kingery et al., "Intro. to Ceramics", 2nd Edition, 1976, pp. 92-93.

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