Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Floating or underwater type
Patent
1996-03-06
1998-07-07
Dang, Hung X.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Floating or underwater type
351 41, G02C 100
Patent
active
057777128
ABSTRACT:
A diving mask comprising: a supporting member arranged for sealing engagement with the face of the user; a lens means mounted in said supporting member, said supporting member being dimensioned, so that the lens means is positioned near the eyes of the user with a portion of the nose extending forwardly of the lens means to provide a low profile, low internal volume mask; and said lens means being substantially spherical in configuration and having a single center of curvature, whereby the apparent magnification of images underwater is less than that observed through a conventional lens plate.
REFERENCES:
patent: 3010108 (1961-11-01), Sachs
patent: 5204700 (1993-04-01), Sansalone
patent: 5502515 (1996-03-01), Sansalone
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