Waterman's sunglass lens
OwnerAndy Ishakinventor
Life of this patent
Estimating the term…
Abstract
An improved ten-layer performance polarized lens for sunglasses. The lens design maximizes visual acuity while minimizing blue-light transmission using a multi-layer dielectric mirror to reduces glare and overall light transmission, two layers of high-contrast blue-blocking amber CR-39 plastic or polycarbonate, sandwiching a polarizing layer. An outer hydrophobic overcoat is also provided to protect against haze, delamination, and smudging, The foregoing layers are arranged to provide a balanced light transmission profile optimum for use on the water in which 100% of UV-A & B light is absorbed to at least 400 nm. The resulting dielectric-mirrored sunglass lens reduces both overall light transmission and ocular photochemical damage.
Claims15
A sunglass lens, comprising:
- a first layer of opthalmic plastic colorized with high-contrast blue-blocking amber-tint;
- a second layer of opthalmic plastic colorized with said high-contrast blue-blocking amber-tint;
- a polarizing layer encapsulated between said first and second opthalmic plastic layers;
- a multilayer dielectric mirror consisting of six thin film layers vacuum deposited atop the first layer of opthalmic plastic for further reducing overall light transmission and glare;
- whereby said layers are arranged to provide a balanced light transmission profile in which substantially 100% of UV-A & B light is blocked to at least 400 nm, and average blue light transmission of said lens is less than 0.4%.
A sunglass lens, comprising:
- a first layer hydrophobic overcoat for protection.
- a second layer dielectric mirror for reducing light transmission and glare, said dielectric mirror consisting of six thin film dielectric layers;
- a third layer blue-blocking amber-tinted opthalmic plastic material;
- a fifth layer blue-blocking amber-tintedopthalmic plastic material;
- a fourth polarizing layer molecularly bonded to said third and fifth plastic layers and sandwiched there between to avoid haze and delamination;
- whereby said layers are arranged to provide a balanced light transmission profile optimum for use on the water in which substantially 100% of UV-A & B light is blocked and at least 99% of blue light is blocked at up to 490 nm and average blue light transmission of said lens is less than 0.4%.
Dependencies are inferred from the claim text.