Slashdot Mirror
Smart Sunglasses
"Many readers have submitted this story of chemists at the University of Washington who have made glasses with lenses that can be transparent or dark, in shades of yellow, green, or purple, all at the push of a button. The glasses will let the wearer instantly change the color of their lenses to virtually any hue by tuning a tiny electronic knob in the frame."
There we go, on top.
With glasses like those, you can be the hit of every nerd party, I can hardly wait.
If you're doing this often enough, as you say, why don't you buy a linear polarizer? Here is a relatively cheap one. Much better ones can be had for more money. You can also use circular polarizing films to block reflected glares.
make world, not war
Really cool glasses do it without being told. Like mine have for the last 40 years.
Only one colour , true, but "look ma , no hands".
Dial in variable density, and variable reaction time. Goes from shade 2 to shade 15 in microseconds, as soon as it senses the arc. You can find chinese knockoffs at Harbor Freight for 50 bucks.
Yellow and purple... they're UW's school colors (well, actually they are purple and gold, but yellow is often used as a substitute for gold). Cool!
The Schuberth Concept and C2 range have a secondary inner sun visor that you can flip down with a slider on the outside of the helmet:
http://schuberth.klaxmedia.de/en/concept.html
http://schuberth.klaxmedia.de/en/c2.html
They're awesome - I've had my Concept about 4.5 years, and I'm definitely getting another when I replace it this summer.
They've been around for years:a ges/fog_city_hyper_optiks.htm
http://www.performancemotorcycleparts.com/visor_p
You have your polarizations backwards. Light that reflects off of the road surface will be primarily horizontally polarized; thus you would need vertically polarized sunglasses to reduce the glare.
Interesting. I ride motorcycles and always wear a full-face helmet. One of the problems I have is that in the morning, the sunlight can be incredibly bright, so I like to wear a reflective shield, which acts like sunglasses. The problem, of course, is that in the evening, it makes it difficult to see (it's almost impossible to ride with a reflective shield at night). This is also true at high noon on country roads where the trees create shadows on the road. I'll have to check into a shield with a yellow tint.
By the way, I wear ski goggles with a yellow tint and everything looks really weird when I take them off after having them on all day!
My lame blog.
Er, linear and circular polarizing filters do the same thing. The main difference is that linear polarizers can play merry hob with TTL metering while circular polarizers alleviate this problem. Both have a rotating outer ring.