Photochromic ophthalmic lens of organic materials

Details Photochromic ophthalmic lens of organic materials Photochromic ophthalmic lens of organic materials

1980-02-26

1981-11-17

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

264 11, 350354, 351177, 425808, B29D 1102, G02B 523, G02C 710

Patent

active

043008216

ABSTRACT:
An ophthalmic lens made of organic material has at least one layer of photochromic mineral glass within its mass to impart photochromic properties to the lens. This layer has a fibrous structure and may comprise a piece of woven fabric produced from fibres of photochromic mineral glass possessing a refractive index and a coefficient of chromatic dispersion which are equal to those of the constituent organic material of the lens.

REFERENCES:
patent: 3512869 (1970-05-01), Plumat et al.
patent: 3711417 (1973-01-01), Schuler
patent: 3970362 (1976-07-01), Laliberte
patent: 4035527 (1977-07-01), Deeg
patent: 4168339 (1979-09-01), Kerko et al.
patent: 4217391 (1980-08-01), Kaltz

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