HUD or heated windscreen

[rhd443]

Just remember that if you wear polarised sun glasses then you will not see the HUD properly.

[St James]

Originally Posted by rhd443

Just remember that if you wear polarised sun glasses then you will not see the HUD properly.

I wondered why it was "faint" - haven't had it before.

Put normal driving glasses on and it's great.

TBH, I love it - hopefully will still love it in the winter when I would normally have had the heated screen doing its magic.......

[Clan]

Originally Posted by St James

I wondered why it was "faint" - haven't had it before.

Put normal driving glasses on and it's great.

TBH, I love it - hopefully will still love it in the winter when I would normally have had the heated screen doing its magic.......

Dont worry too much about the heated screen the standard system is very capable of demisting on it's own 👍

[xsaab]

The bonus from having a HUD screen as opposed to a heated screen is that any addiitional SatNavs you may have attached to the dashboard will work quicker and more accurately if there is no heating elements in the windscreen.

Why an additional SatNav - do not ask - but if you have two then it is nice to have the second one to get a different view of the route.

[AB-UK]

Originally Posted by rhd443

Just remember that if you wear polarised sun glasses then you will not see the HUD properly.

Such a shame the designers hadn't considered that.
It's not as if polarized lenses are a new idea is it.

[Saftlad]

Originally Posted by AB-UK

Such a shame the designers hadn't considered that.
It's not as if polarized lenses are a new idea is it.

Eh? That's how all HUDs work, reflecting off a polarised section of glass/plastic

[met24]

Originally Posted by Saftlad

Eh? That's how all HUDs work, reflecting off a polarised section of glass/plastic

I don't think the glass itself is polarised, although as I understand it there is a layer somewhere in the windscreen to prevent double reflections. The horizontal polarisation of the reflected image is an unavoidable side effect of the reflection off the glass at the angle that's used (Google for "Brewster's angle"). To avoid it the angle of reflection (between the image and the normal / perpendicular to the glass) would have to be much less, which would mean the projector would probably get in the way of the instrument panel.

I won't pretend to understand why reflections off metallic surfaces aren't polarised while reflections off non-metallic surfaces are. That's way beyond A-Level Physics!

If you had a vertical piece of glass that reflected an image from a projector mounted to the left or right, rather than below, that would avoid the problem, but that would look downright ugly too.

I've got used to driving without polarised sunglasses now, the only time I've found I could really do with them is when I'm driving through a tree tunnel and the angle of the sun is just enough to cause flickering reflections on the windscreen -- polarisation kills those.

[Wizzpop]

Originally Posted by met24

I won't pretend to understand why reflections off metallic surfaces aren't polarised while reflections off non-metallic surfaces are. That's way beyond A-Level Physics!

Explanation here for anyone interested.
Why does light not polarise off metallic surface

[HardouinMeilleur]

Merci pour ce retour hyper compréhensible...

[AB-UK]

Originally Posted by Saftlad

Eh? That's how all HUDs work, reflecting off a polarised section of glass/plastic

No problems wearing polarised sunglasses with my Wife's Kona EV which has a pop-up HUD.