Spectacle lens

Details Spectacle lens Spectacle lens

2009-07-23

2010-12-07

Collins, Darryl J (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S172000

Reexamination Certificate

active

07845796

ABSTRACT:
A spectacle lens includes a multi-contact diffractive optical element formed on at least one surface of a overall lens system that is arranged from an object to a pupil, in which an apparent Abbe number Vdwhen the overall lens system including the multi-contact diffractive optical element is regarded as a single lens satisfies Vd>60 . . . (1).

REFERENCES:
patent: 5847877 (1998-12-01), Imamura et al.
patent: 6008942 (1999-12-01), Ogusu et al.
patent: 6157488 (2000-12-01), Ishii
patent: 6781756 (2004-08-01), Ishii
patent: 2004/0263982 (2004-12-01), Ishii
patent: 2008/0278681 (2008-11-01), Blum et al.
patent: 9-127321 (1997-05-01), None
patent: 9-127322 (1997-05-01), None
patent: 2000-284238 (2000-10-01), None
patent: 2004-013081 (2004-01-01), None
Introduction to Diffractive Optical Elements, revised and enlarged edition, pp. 25-38, pp. 163-175, The Optronics Co., Ltd., Dec. 8, 2006.

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