Most durable AR coating for eyeglasses?

"SQ" <(E-Mail Removed)> wrote in message
news:dbb2d9d3-0b32-45a5-8d9a-(E-Mail Removed)...
> Interesting. Of course, I have 1.67 High-Index. I wonder if I should
> go to 1.60 high-index versus 1.67 to get a higher quality lense, with
> better view quality. Or is there not enough difference between 1.60
> and 1.67?
>
> My myopia is -5.25 Diopters in both eyes.
>
> I want to get the best possible optical 'picture quality' and AR is a
> step in the right direction towards that. I didn't specifically notice
> that eliminated glare but did notice that it greatly improved view
> quality in twilight and at night. This only became apparent when I got
> a non-AR pair of lenses.
>
> Also durability of AR coating is a huge issue for me. It's not that I
> am rough with eyeglasses but I do tend to clean them several times per
> day. A poor AR coating will scratch easy and come off eventually,
> which is what happened to my previous pair of lenses. It did offer
> nice view though.

It is a mater of aesthetics and weight.

A 1.67 index lens is thinner and therefore lighter than a 1.60 index lens.
On a -5.25 this will show up as edge thickness, and is a cosmetic issue with
some people. But a lighter lens is also important to some people, and it
"could" keep your frames from slipping off your nose as much if the lens
where heavier.

But a 1.60 lens will have better optical quality than a 1.67 lens,
especially in terms of chromatic aberration (abbe value). Some people are
more susceptible to chromatic aberration than others.

Also, a 1.67 lens costs more, but sometimes it is hard to find a lens with
1.60 index material.

If you get one of the premium AR coatings put on by the lens manufacturer
that I already mentioned, I would not worry about AR durability.

You can try Chemalux AR coating. Its superior quality, high heat
resistance so there is no peel off or crazing problem.
You may email your queries at (E-Mail Removed)


On Jul 22, 3:26*pm, "Mark A" <nob...@nowhere.com> wrote:
> "SQ" <onestatus...@yahoo.com> wrote in message
>
> news:dbb2d9d3-0b32-45a5-8d9a-(E-Mail Removed)...
>
>
>
> > Interesting. *Of course, I have 1.67 High-Index. *I wonder if I should
> > go to 1.60 high-index versus 1.67 to get a higher quality lense, with
> > better view quality. Or is there not enough difference between 1.60
> > and 1.67?
>
> > My myopia is -5.25 Diopters in both eyes.
>
> > I want to get the best possible optical 'picture quality' and AR is a
> > step in the right direction towards that. I didn't specifically notice
> > that eliminated glare but did notice that it greatly improved view
> > quality in twilight and at night. This only became apparent when I got
> > a non-AR pair of lenses.
>
> > Also durability of AR coating is a huge issue for me. It's not that I
> > am rough with eyeglasses but I do tend to clean them several times per
> > day. A poor AR coating will scratch easy and come off eventually,
> > which is what happened to my previous pair of lenses. It did offer
> > nice view though.
>
> It is a mater of aesthetics and weight.
>
> A 1.67 index lens is thinner and therefore lighter than a 1.60 index lens..
> On a -5.25 this will show up as edge thickness, and is a cosmetic issue with
> some people. But a lighter lens is also important to some people, and it
> "could" keep your frames from slipping off your nose as much if the lens
> where heavier.
>
> But a 1.60 lens will have better optical quality than a 1.67 lens,
> especially in terms of chromatic aberration (abbe value). Some people are
> more susceptible to chromatic aberration than others.
>
> Also, a 1.67 lens costs more, but sometimes it is hard to find a lens with
> 1.60 index material.
>
> If you get one of the premium AR coatings put on by the lens manufacturer
> that I already mentioned, I would not worry about AR durability.

In article
<e06c286e-0bd6-4980-8e32-(E-Mail Removed)>,
(E-Mail Removed) wrote:

> You can try Chemalux AR coating. Its superior quality, high heat
> resistance so there is no peel off or crazing problem.
> You may email your queries at (E-Mail Removed)

I tend to be very skeptical when it comes to bragging about coatings.
While the real secret to the coatings is the technique used to clean
substrates and deposit materials, vendors end to be cagey about their
designs and materials. I will send this to yhe address above, but I do
not expect to get ANY meaningful reply.

1. Is your design for a particular index of refraction of the
substrate? What is that?

2. What are the thicknesses and indexes of the layers deposited
starting with first one deposited? Material names would be nice but I do
not expect them.

3. I presume the deposition is by evaporation. If that is not the case,
what is the method used?

4. At what temperature is the deposition made?

5. What temperature can the coating take?

6. What tests do you use to check durability?

the true application of AR coating is done with a process called in chamber ion-assisted vapor deposision it derives from semi-coductor industry. any other questions i
will gladly answer.