Method of producing durable bonds between an optical preform and

Details Method of producing durable bonds between an optical preform and Method of producing durable bonds between an optical preform and

1992-07-20

1994-05-31

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

264 23, 264 27, B29D 1100

Patent

active

053167023

ABSTRACT:
A method of casting an ophthalmic optic is described. A mold, an optical preform and a polymerizable resin are provided. The resin is disposed between the mold and the optical preform. The preform and the resin interact to produce a contact angle between the resin and preform of from about 20 degrees to about 45 degrees; or the mold and the resin interact to produce a contact angle between the mold and the resin of from about 45 to about 75 degrees; or both. The polymerizable resin is then cured.
Another method of casting an ophthalmic optic is also described. A mold, an optical preform and a polymerizable resin are provided. The optical preform is supplied with a surface having a regular pattern of grooves that comprise a grid formed by intersecting curves or lines imprinted on the surface of the optical preform. The polymerizable resin is provided between the optical preform and the mold such that the polymerizable resin contacts the regular pattern of grooves on the optical preform. The polymerizable resin is then cured.

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Abstract of AU-A-80556/87, Jun. 2, 1988, Sola International Holdings Ltd., Inventor Philip Horley Squires, Filed Oct. 30, 1987.

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