Method of manufacturing a molded article, manufacturing...

Details Method of manufacturing a molded article, manufacturing... Method of manufacturing a molded article, manufacturing...

2007-05-25

2008-11-04

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S718000

Reexamination Certificate

active

07446950

ABSTRACT:
A method of manufacturing an optical element, such as an objective lens, by heat-softening optical glass and press molding it with high precision in a pressing mold. The method comprises press-molding a molding material with a pressing device, comprising a pair of molds with prescribed shape, to make a molded article, measuring an optical property of the molded article, correcting pressing rate of at least one of the pressing molds based on the optical property thus measured, and further press-molding to make a molded article with the corrected pressing rate. The device has a means of driving one of the pair of pressing molds at a prescribed rate, a means for detecting an optical property, a shape or a number of the molded articles, and a means for controlling driving of the means of driving by correcting pressing rate of the molds based on the detected property, shape or number.

REFERENCES:
patent: 6512640 (2003-01-01), Ota et al.
patent: 6515808 (2003-02-01), Saito
patent: 2004/0100703 (2004-05-01), Kimura et al.

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