Method for fabricating grin lens elements by spin molding

Details Method for fabricating grin lens elements by spin molding Method for fabricating grin lens elements by spin molding

1990-12-04

1992-06-16

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 17, 264 21, 264 26, 264 401, 264 404, B29D 1100

Patent

active

051223147

ABSTRACT:
A method and apparatus for producing a plastic lens element having a gradient index of refraction is disclosed in which first and second monomer-containing compositions, each having a different index of refraction, are injected into a centrifugal mold. Precise control of the gradient index is achieved by varying the ratio of the two monomers over a predetermined number of steps during the filling process.

REFERENCES:
patent: 3256373 (1966-06-01), Horst
patent: 3718383 (1973-02-01), Moore
patent: 4022855 (1977-05-01), Hamblen
patent: 4451507 (1984-05-01), Beltz et al.
patent: 4666640 (1987-05-01), Neefe

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