Transition Windshield...

I was thinking that the windshield along with the other window panel surfaces could be equipped with the transition technology the glasses use, the more sun and the brighter, the more the window panels would deepen to block out the sun rays? Being in Arizona that would be perfect, sometimes afternoon sun and morning sun are so piercing to the eyes, the window would auto adjust to the intensity of the rays? eliminating the sun visor!! less plastics!! Or being here in seattle when the sun does come out, its an effortless way to control it...
Theresa veselovsky 01/21/2014
I love this idea! I thought that I was going to create It. I looked it up on google and I just found you! Really! Lets do it? Theresa.
Kimo1994 01/30/2013
What about just doing the side windows and the back window? I love the dark tinting in my back window during the day but at night I have to put my head out the window to back up. Also what if they made it like a adhesive. Like how regular aftermarket tinting is. I know I'd deffinetly pay for a roll or two of that!
william 03/28/2012
Remeber the manual foot button on the floor of the car? The tinting unit could be electronically controlled by the driver when needed. The system could be made seperate from the actual windshield so that it is portable and just plugs in to a dc connector.
Robert McNeill 06/05/2011
I wear Transition lenses and like them a lot. (When you wear these glasses you rarely notice any change. But take them off in bright sunlight and the difference is obvious -- and the lenses are dark.)

I did, however, closely question the optometrist about sudden outside darkness. The classic version of this is to be driving down I95 and enter the Baltimore Tunnel at about 50 mph. Will I have a serious safety problem with only a few seconds to adjust to the dark tunnel or must I take off my glasses during the last few seconds of approach?

He answered that the auto glass in the car would not transmit the UV wavelengths that trigger the "transition" effect and the lenses would not be dark when driving. So far that seems to be correct.

So the real problems are (a) What sources of ultraviolet light exist at night? I'm not sure oncoming-car headlamps would be a problem. It may depend on what kinds of streetlights are out there. The second problem is the Transition treatment. The Science Channel had a segment on how the lenses are created. First, they are plastic, not glass; not sure how this would work in autos for safety reasons. Second, the lenses are heat-treated and infused with the chemical in special "clean rooms." This may be difficult or impractical for large automotive windshields.
will 05/11/2011
why would it matter if it was on your face or on your window? it will let in an out light the same lol
BuzzDog 04/21/2011
My Dad worked for a major automotive glass supplier, and I recall asking him about this when photochromic eyeglass lenses first came out in the 1970s. He said it had been considered for auto glass, but abandoned over concerns that the headlamps of oncoming vehicles would darken the windshield, reducing night vision.