Re: The "lightest" polarized sunglasses?

In article <gfuAf.4459$Hd4.2760@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, rw56
_to_the_chase@xxxxxxxxxxxxx says...
> Any effective polarized lenses will have a light transmission of no
> greater than 50%. That's because they're filtering the horizontal
> component of the light. Some manufacturers claim 50% transmission, but I
> don't believe it, or if it's true then the polarization is poor. It's
> theoretically possible with perfectly polarizing neutral gray lenses,
> but not with lenses with any color tint. (That's because the tint would
> also filter some of the spectrum of the vertical component.) In
> practice, I suspect the best you can hope for is around 30% light
> transmission, and even then I doubt that the polarization would be as
> effective as is possible with darker lenses.

I don't know the current manufacturing process, but it is at least
theoretically possible that you only filter out light within several
degrees of horizontal. If 0 degrees is purely horizontal, filter 100%
between +5 and -5, but pass 100% everything else.

Again, I don't know what current state-of-the-art is, but you could
build it.
- Ken
.

Relevant Pages

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