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anti-dazzle? visor

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bigdom86
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PostPosted: 23:55 - 30 Nov 2015    Post subject: anti-dazzle? visor Reply with quote

not sure if its a word "anti-dazzle", but can you get visor inserts that stop that light effect you get in the rain when looking through a visor. like when your in a car in the rain and someone is sitting infront of you with their brakes on
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kramdra
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PostPosted: 00:02 - 01 Dec 2015    Post subject: Reply with quote

I have been wondering if a polarising filter/visor could be made to remove light from oncoming cars. That would be brilliant, but any glasses usually tinted.

Last edited by kramdra on 00:11 - 01 Dec 2015; edited 1 time in total
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monkeybiker
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PostPosted: 00:07 - 01 Dec 2015    Post subject: Reply with quote

Make sure your visor is clean and has no scratches.
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MCN
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PostPosted: 01:11 - 01 Dec 2015    Post subject: Reply with quote

monkeybiker wrote:
Make sure your visor is clean and has no scratches.


^^^ This. End of thread. Smile
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brains_t
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PostPosted: 01:27 - 01 Dec 2015    Post subject: Reply with quote

Clean and no scratches doesn't help once the visor is hit with greasy spray from road. I find yellow tint visor or pinlock will help but looking for a better solution.
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Kris
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PostPosted: 10:20 - 01 Dec 2015    Post subject: Reply with quote

I'm still using a light tint visor. Seems to help with the brightness of oncoming cars what with their headlights aimed at Jupiter.. Rolling Eyes

The dazzle is made worse with water on the visor, have you tried gloves with a visor wipe to keep it clear?
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iooi
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PostPosted: 10:35 - 01 Dec 2015    Post subject: Re: anti-dazzle? visor Reply with quote

bigdom86 wrote:
but can you get visor inserts that stop that light effect you get in the rain when looking through a visor


In a word "NO"

As the reason for the light effect is the water drops acting as a lens and refracting the light.
The only way to combat it is to keep the visor dry and clean or have a reverse water drop on the inside of the visor Laughing

You still get the same problem in cars. Only its not as bad as the wipers do a good job of keeping the water at bay and you are further away from the cause of the problem. Meaning that the light is scattered further away and a lot less focused.

A polarising filter only works in one direction. So will not stop this effect. Yes it will negate some of it, but not all of it.
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bigdom86
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PostPosted: 10:40 - 01 Dec 2015    Post subject: re Reply with quote

visor is clean and no cracks, it is only when the rain gets on it, maybe have a look at gloves with a wipe
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Kawasaki Jimbo
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PostPosted: 13:48 - 01 Dec 2015    Post subject: Reply with quote

Not serious suggestions, but interesting anyway;

Spinning disc (still available for karting from Demon Tweeks) or electronic wipers.
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Polarbear
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PostPosted: 14:27 - 01 Dec 2015    Post subject: Reply with quote

Kawasaki Jimbo wrote:
Not serious suggestions, but interesting anyway;

Spinning disc (still available for karting from Demon Tweeks) or electronic wipers.


We have those on ships but they run at 2000rpm to clear the screen Laughing Can't see an air powered one working!!!

https://www.navitech.co.uk/content/images/weather-tight-clear-view.jpg
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MCN
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PostPosted: 14:35 - 01 Dec 2015    Post subject: Re: anti-dazzle? visor Reply with quote

iooi wrote:
bigdom86 wrote:
but can you get visor inserts that stop that light effect you get in the rain when looking through a visor


In a word "NO"

As the reason for the light effect is the water drops acting as a lens and refracting the light.
The only way to combat it is to keep the visor dry and clean or have a reverse water drop on the inside of the visor Laughing

You still get the same problem in cars. Only its not as bad as the wipers do a good job of keeping the water at bay and you are further away from the cause of the problem. Meaning that the light is scattered further away and a lot less focused.

A polarising filter only works in one direction. So will not stop this effect. Yes it will negate some of it, but not all of it.


Nice try iooi Thumbs Up but the physics is wasted on some folks. Sad

If we/mankind hadn't invented fire and the wheel then this problem wouldn't even exist.
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iooi
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PostPosted: 16:12 - 01 Dec 2015    Post subject: Re: anti-dazzle? visor Reply with quote

MCN wrote:

If we/mankind hadn't invented fire and the wheel then this problem wouldn't even exist.


If only Adam hadn't eaten that apple Laughing
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andyscooter
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PostPosted: 16:42 - 01 Dec 2015    Post subject: Reply with quote

finish work earlier so it isn't dark :up:hth
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Alpineandy
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PostPosted: 18:56 - 01 Dec 2015    Post subject: Reply with quote

I understand that they now make rainx (or similar) for plastic which in theory would help with the water dispersal. I gather the version for glass windscreens doesn't work on visors but haven't tried it.
I'd recommend a yellow tinted visor (or glasses) for anyone doing much riding (or driving) at night. If I have to do many miles at night I tend to get headlamp 'dazzle' headaches if I don't use yellow glasses.
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MCN
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PostPosted: 21:38 - 01 Dec 2015    Post subject: Reply with quote

Alpineandy wrote:
I understand that they now make rainx (or similar) for plastic which in theory would help with the water dispersal. I gather the version for glass windscreens doesn't work on visors but haven't tried it.
I'd recommend a yellow tinted visor (or glasses) for anyone doing much riding (or driving) at night. If I have to do many miles at night I tend to get headlamp 'dazzle' headaches if I don't use yellow glasses.


Any tint will reduce the amount of light you can see.
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Nomad Z
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PostPosted: 22:13 - 01 Dec 2015    Post subject: Reply with quote

MCN wrote:
Any tint will reduce the amount of light you can see.


The amount of reduction depends not only on the density of the tint, but on the colour of the tint and the colour of the external objects being looked at. Matching colours (like yellow object and yellow visor) will be slightly darker, while complementary colours (yellow visor, blue object) will look much darker, with varying amounts of darkening in between. The net effect is to increase chromatic contrast.

Given that our eyes have an in-built automatic exposure system, better contrast can be more worthwhile than avoiding a slight darkening of the overall scene, although the benefit depends on how dark things are overall, and how much the pupils can open up to compensate.


Last edited by Nomad Z on 00:52 - 02 Dec 2015; edited 1 time in total
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Kaya75
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PostPosted: 23:54 - 01 Dec 2015    Post subject: Reply with quote

Pin lock helps stop inside misting,

You can get a rubber wiper to fit over the finger of glove about a fiver from anywhere, net or really real shop
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MCN
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PostPosted: 04:21 - 02 Dec 2015    Post subject: Reply with quote

Nomad Z wrote:
MCN wrote:
Any tint will reduce the amount of light you can see.


The amount of reduction depends not only on the density of the tint, but on the colour of the tint and the colour of the external objects being looked at. Matching colours (like yellow object and yellow visor) will be slightly darker, while complementary colours (yellow visor, blue object) will look much darker, with varying amounts of darkening in between. The net effect is to increase chromatic contrast.

Given that our eyes have an in-built automatic exposure system, better contrast can be more worthwhile than avoiding a slight darkening of the overall scene, although the benefit depends on how dark things are overall, and how much the pupils can open up to compensate.


It's nothing to do with contrast. If there's not much light then there will not be much contrast. The important thing is to see as much light as possible.
https://www.laramyk.com/resources/education/dispensing/the-dangers-of-night-driving-glasses/] Yellow Tint [/url]
The Frogs used to use yellow headlamps for the same unfounded reasons. It was stopped after science proved the theory was garbage.
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Alpineandy
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PostPosted: 13:38 - 02 Dec 2015    Post subject: Reply with quote

MCN wrote:
It was stopped after science proved the theory was garbage.


You can refer to it as garbage but as far as I'm concerned It works. It may reduce the overall amount of light somewhat but it reduces the 'dazzle' effect substantially which is what gives me the headaches.
If it doesn't work for you or for 95% of the driving population, so be it. But it works for me. Cool
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Kawasaki Jimbo
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PostPosted: 13:57 - 02 Dec 2015    Post subject: Reply with quote

MCN wrote:
The Frogs used to use yellow headlamps for the same unfounded reasons. It was stopped after science proved the theory was garbage.


The link doesn't actually debunk the idea though, it just points out that whilst amber lenses filter out some short (blue) wavelengths (so you're receiving less information) this may be offset in certain circumstances by reducing glare or dazzle. Seeing as much light as possible isn't always good.

I guess in a foggy, illuminated city-scape a yellow lens/visor can be helpful, but elsewhere you might be more concerned about spotting the blue wavelengths on the edge of your pool of light.

Yellow light triggers both the red and the green cones in the human eye making it the colour we are most sensitive to, but then the way the brain processes the information is probably influential too. Maybe this is where contrast comes in?
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Firkit
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PostPosted: 13:59 - 02 Dec 2015    Post subject: Reply with quote

Has nobody come up with a visor that employs one of those future-science-today hydrophobic materials yet? Seems like a perfect application and shouldn't be prohibitively expensive.
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Alpineandy
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PostPosted: 14:06 - 02 Dec 2015    Post subject: Reply with quote

Lots of visor rain repellent sprays around (on the bay). Not sure if they work.....

I do use RainX on the car (which I think works but only when lots of care is taken when applying it) but I heard that stuff wasn't any good on plastic visors. Although someone told me a few days back that they now do a version for plastic/visors.
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Polarbear
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PostPosted: 15:41 - 02 Dec 2015    Post subject: Reply with quote

Honest Officer, the reason I was doing 150mph was that I have found rain clears off my visor better at that speed than 70. Thumbs Up
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