Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With moisture prevention or absorption
Patent
1995-11-28
1997-03-11
Dang, Hung
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With moisture prevention or absorption
351 41, 2435, 2436, 2437, G02C 1108, G02C 100
Patent
active
056106688
ABSTRACT:
Protective eyeglasses (e.g., sunglasses) for use in high-speed outdoor sports activities, the lenses thereof being resistant to condensation, is achieved by air circulation created by venturi effects. The glasses comprise a frame front having middle portions over the wearer's eyes which support protective lenses, and having endpiece portions near the wearer's temples, the outboard edges of which attach temples which hold the glasses in place. A chamber is defined by the volume between the lenses and the wearer's face, and gaps are defined by the distance between the middle portions of the frame front and the wearer's face. Apertures in each of the endpiece portions of the frame front define an entrance of a ventilation channel for air flow through the frame front, adjacent to the respective chamber. Venturi forces are created within the ventilation channels to facilitate circulation of air. Improved ventilation, and the reduction or elimination of fogging on the lenses, is accomplished by low-cost and lightweight glasses.
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Dang Hung
Spy Optic, Inc.
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