Apparatus for manufacturing lenses

Details Apparatus for manufacturing lenses Apparatus for manufacturing lenses

1975-06-26

1978-02-21

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

B24B 4106

Patent

active

040744698

ABSTRACT:
A device is provided for forming aspheric surfaces in an optical lens by distorting the lens blank in a predetermined manner and forming spherical surfaces in the distorted lens. One or both surfaces of the lens may be formed with an aspheric surface. The resultant lens may include a cylindrical correction also produced by distortion or may include substantially continuous bifocal lens. The lens is particularly adapted for application as a contact lens.

REFERENCES:
patent: 3069818 (1962-12-01), Atols
patent: 3079736 (1963-03-01), Kratt
patent: 3079737 (1963-03-01), Kratt
patent: 3153960 (1964-10-01), Allport
patent: 3589079 (1971-06-01), Beasley

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