HUD Windshield Optical Coating
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Joined: Jul 2004
Posts: 70
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From: Virginia Beach VA
HUD Windshield Optical Coating
Hey all,
Thanks to the many threads here and some excellent online pictorials, I installed a HUD into my 98 last weekend. The results are great, but the intensity during the daytime is not that great. Anyone have an idea of how to simulate the interior optical coating...wipe-on, rub-in something?
Thanks,
Brian
Thanks to the many threads here and some excellent online pictorials, I installed a HUD into my 98 last weekend. The results are great, but the intensity during the daytime is not that great. Anyone have an idea of how to simulate the interior optical coating...wipe-on, rub-in something?
Thanks,
Brian
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Joined: Jul 2004
Posts: 70
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From: Virginia Beach VA
I hear you, Ls1rat. I am just wondering if I can find a spray-on coating that has an 80% or so reflectivity...perhaps specific to the green wavelength used by the projector.
As for windshields, looks like I can find those on Ebay...
As for windshields, looks like I can find those on Ebay...
Burning Brakes
Joined: Sep 2001
Posts: 1,173
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From: Aguila AZ
The HUD windshield does not improve HUD optical quality. It only cuts down on reflections inside the windshield. This is because the HUD bezel presents an annoying reflection and the HUD windshield reduces this a lot. Save your HUD windshield money and invest a few bucks in a dash pad that fits tightly around the HUD projector. This will eliminate all reflections coming off the dash and it will protect your dash from UV damage well into the future.
Shirl
Shirl
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Joined: Jul 2004
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From: Virginia Beach VA
Thanks for the responses. I will look into a dashpad, as I do notice the bezel reflection. I had just heard that the clarity and intensity of the HUD image were noticeably different with a HUD windshield.
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Joined: Jul 2004
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From: Virginia Beach VA
If anyone is interested, I found an informative quote concerning my problem,
here is the address
http://hud.cz28.com/fsguestbook.html
"I am a process engineer for the company that makes the HUD windshields for the Corvette, Park Avenue, and Cadilac XLR. Your ghosting problem will not be solveable. A windshield is made from two layers of glass with a layer of PVB (vinyl) between them. When you project a HUD image on the windshield you get a reflected image from the inside sufrace and one from the outside surface. In a normal (non-HUD)windshield these surfaces are parallel and therefore the images are offest from eachother producing a ghosted image. The Dupont vinyl for a HUD windshield ("Butacite" wedge vinyl)is thicker at the top than at the bottom. This makes the two reflecting surfaces nonparallel and the two reflected images are superimposed. Each car model requires a model specific vinyl wedge angle to achieve this. This angle is very small, in the Corvette the angle is only 0.24 miliradians."
here is the address
http://hud.cz28.com/fsguestbook.html
"I am a process engineer for the company that makes the HUD windshields for the Corvette, Park Avenue, and Cadilac XLR. Your ghosting problem will not be solveable. A windshield is made from two layers of glass with a layer of PVB (vinyl) between them. When you project a HUD image on the windshield you get a reflected image from the inside sufrace and one from the outside surface. In a normal (non-HUD)windshield these surfaces are parallel and therefore the images are offest from eachother producing a ghosted image. The Dupont vinyl for a HUD windshield ("Butacite" wedge vinyl)is thicker at the top than at the bottom. This makes the two reflecting surfaces nonparallel and the two reflected images are superimposed. Each car model requires a model specific vinyl wedge angle to achieve this. This angle is very small, in the Corvette the angle is only 0.24 miliradians."
Pro
Joined: May 2001
Posts: 715
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From: Central SJ Valley, Calif
Originally Posted by s.y.n.c.
"I am a process engineer for the company that makes the HUD windshields for the Corvette, Park Avenue, and Cadilac XLR. Your ghosting problem will not be solveable. A windshield is made from two layers of glass with a layer of PVB (vinyl) between them. When you project a HUD image on the windshield you get a reflected image from the inside sufrace and one from the outside surface. In a normal (non-HUD)windshield these surfaces are parallel and therefore the images are offest from eachother producing a ghosted image. The Dupont vinyl for a HUD windshield ("Butacite" wedge vinyl)is thicker at the top than at the bottom. This makes the two reflecting surfaces nonparallel and the two reflected images are superimposed. Each car model requires a model specific vinyl wedge angle to achieve this. This angle is very small, in the Corvette the angle is only 0.24 miliradians."
No wonder that damn thing costs so much to replace!
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St. Jude Donor '17
3m does it i believe and i have seen after market huds use a small piece of window film kind of material to cut down on ghosting
there is dimmer option on the hud if ur having problems with brightness
there is dimmer option on the hud if ur having problems with brightness
