Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1983-09-02
1986-10-28
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351159, 351165, 351177, 427162, 427259, G02C 710, G02C 702, B05D 132
Patent
active
046195041
ABSTRACT:
The invention is directed to an ophthalmic lens having a marking and a method of producing the same. The lens is suitable for spectacles and the like. The method includes applying a removable adhering substance to a region of the surface of the lens body so that the peripheral outline of the substance corresponds to the marking to be formed. Then, an anti-reflection coating is applied to the lens body and, at a time thereafter, the adhering substance and the portion of the coating covering the substance is removed thereby causing a recess to be formed in the coating having a peripheral outline defining the marking. The marking formed in this way is practically invisible to a person wearing spectacles equipped with the lens of the invention. On the other hand, the marking is clearly visible when viewed in reflected light.
REFERENCES:
patent: 3914464 (1975-10-01), Thomasson et al.
patent: 3981568 (1976-09-01), Bartolomei
patent: 4045125 (1977-08-01), Farges
patent: 4145125 (1979-03-01), Chika
patent: 4188417 (1980-02-01), Lichtenberg
Pacey, D. J., "Antireflection Coatings for Ophthalmic Lenses"; The Optician; vol. 147, No. 3821, Jun. 26,1964, pp. 633-637.
Daniels Erwin J.
Kratzer Bernd
Schurle Hermann
Carl-Zeiss-Stiftung
Corbin John K.
Ottesen Walter
Sugarman Scott J.
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