Method for molding optical elements

Details Method for molding optical elements Method for molding optical elements

1992-04-27

1994-03-01

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

264 14, B29D 1100

Patent

active

052904881

ABSTRACT:
A method and apparatus for molding optical elements in which peeling between a glass member and a resin layer and between a mold member and the resin layer will not occur while at the same time it is possible to accurately bring the central axis of the glass member and the central axis of the molding surface into alignment. This is accomplished by a first step of placing the glass member upon a support portion, a second step of positioning the glass member relative to the mold means when a resin material, which has been charged into a space defined by the molding surface and the surface of the glass member, exhibits a viscosity within a predetermined range, a third step of holding the glass member at a predetermined position until the resin material cures to a predetermined ratio of polymerization, and a fourth step of releasing the glass member from the held state after the resin material has cured to the predetermined ratio of polymerization.

REFERENCES:
patent: 3423488 (1969-01-01), Bowser
patent: 3428533 (1969-02-01), Pichel
patent: 4061518 (1977-12-01), Burroughs et al.
patent: 4116753 (1978-09-01), Tojyo et al.
patent: 4155962 (1979-05-01), Neefe
patent: 4159292 (1979-06-01), Neefe
patent: 4235654 (1980-11-01), Dohi et al.
patent: 4623496 (1986-11-01), Verhoeven et al.
patent: 4738516 (1988-04-01), Verhoeven et al.

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