Method and apparatus for viewing polarized displays

Details Method and apparatus for viewing polarized displays Method and apparatus for viewing polarized displays

2005-09-06

2008-05-20

Mai, Huy K (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With antiglare or shading

C351S044000, C351S165000

Reexamination Certificate

active

07374282

ABSTRACT:
A pair of sunglasses is provided with a polarized region in the upper portion of the eyeglass lens and a non-polarized region in the bottom portion of the eyeglass lens so as to permit reading of polarized instruments through the non-polarized region. The two regions may be separated horizontally at the halfway point or below the halfway point such that, by tilting one's head upwardly and looking through the non-polarized region, one can readily read the instruments which would appear black through the polarized region due to the cross-polarization. In one embodiment the polarization level is gradually decreased from the top to the bottom of the lens in a polarization gradient in which there is no polarization at the bottom portion of the lens.

REFERENCES:
patent: 4915495 (1990-04-01), Takeuchi
patent: 6623116 (2003-09-01), Kerns et al.
patent: 2004/0046927 (2004-03-01), Montgomery
patent: 2007/0046888 (2007-03-01), Kurzrok

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