tolerance on AR coating

[essegn]

What tolerances on AR coating curve shift do you use (in comparison to the master lens) and which measuring methods do you use ?
I was told that tolerances would be +-2.5% of wavelenght and +-0.15 in reflection - to the master measurement.
Another what i have heard was tolerance +-1% of wavelenght.

Then i have the following chart:



Is it better to use this "curve comparison" or delta Lab ? What are the differences in result or which is most suitable for the "real" life.
Do you have an experience that cx side is harder to obtain than cc side ?

Many thanks for the replies.

[essegn]

I am surprised that i have got no answer.

So far i have heard a lot of stories, that the best AR coating experienced stuff are not measuring the curves (for color). They just look at the the color of recfection and they say - we need to add more oxygen. I am just wondering if this could be reason why i have got any answer so far.. That it is not being measured and the tolerance are set according to experience of responsible person who checks the reflection color.

[Chris Ryser]

I am surprised that i have got no answer.

..........................the reason is that most posters on OB have absolutely no notion on how AR coatings are made in detail, nor how to check them for errors. They are the final sellers to the consumers and feel that they should get a perfect product for the price they are paying and also selling them. They discuss the quality angle between differently priced products without much involvement into that part of the industry.

[MikeAurelius]

..........................the reason is that most posters on OB have absolutely no notion on how AR coatings are made in detail, nor how to check them for errors. They are the final sellers to the consumers and feel that they should get a perfect product for the price they are paying and also selling them. They discuss the quality angle between differently priced products without much involvement into that part of the industry.

WOW...way to go Chris, insulting practically every member of this board.

[Judy Canty]

No insult seen here. Most don't know much about AR treatments beyond the marketing.

[MakeOptics]

..........................the reason is that most posters on OB have absolutely no notion on how AR coatings are made in detail, nor how to check them for errors. They are the final sellers to the consumers and feel that they should get a perfect product for the price they are paying and also selling them. They discuss the quality angle between differently priced products without much involvement into that part of the industry.

I'm game N.A.I.C.I.T.P.O D.L.O, can you bless me with your infinite knowledge of thin film coatings.

[EyeCare Rich]

Most of us recomend and dispense A/R coatings, not all of us work in a lab where this testing would be done. We (as a whole) I think have a little more than a notion of how A/R is made and applied to much more detail than was mentioned in a previous post though. We are just not involved in the process that the original post was asking.

[MakeOptics]

Most of us recomend and dispense A/R coatings, not all of us work in a lab where this testing would be done. We (as a whole) I think have a little more than a notion of how A/R is made and applied to much more detail than was mentioned in a previous post though. We are just not involved in the process that the original post was asking.

+1, Great post right along the lines of what I was thinking.

I don't think an "optician" should have the equipment to measure and verify a coating to the degree that the poster is asking. I also don't expect the poster to have the working knowledge of fitting a progressive lens to the degree that I have. I am a big advocate of calling people by their true titles, but everyone from the guy replacing the water in the coolers to the guy moping up the floor at the lab feels that they can use the title optician because it sounds good. If you are not actively dispensing you are not an optician. The poster is a "thin film coating technician", I doubt their is a board for that specifically, this seems like the appropriate board to find someone with a working knowledge of what you need but being that specific it does narrow down the pool of respondents.

[Rafael]

Hello Essegn, and all interested in thin films:

i´m sure that also here you will get an answer. But MakeOptics is right you should go for thin film related question to another forums, you will get faster a reply.
On linkedin.com there are several forums:
For example:Coating and Processing Systems

Contact Dave Taddeo, he publish some really nice webinars and can answer your questions.

Here the link to the webinar on youtube:

Episode 1: http://www.youtube.com/watch?v=nvDoybTJlks


Episode 2: http://www.youtube.com/watch?v=U9ou0R3RbWE


Episode 3: http://www.youtube.com/watch?v=LiaX3AujQWY


Episode 4: http://www.youtube.com/watch?v=74cqQpehY2E


Episode 5 http://www.youtube.com/watch?v=H47BncWv9jk

Software used in his webinar for free:
http://www.ftgsoftware.com/fsindex.htm

Have Fun
Rafael

[DanLiv]

..........................the reason is that most posters on OB have absolutely no notion on how AR coatings are made in detail, nor how to check them for errors. They are the final sellers to the consumers and feel that they should get a perfect product for the price they are paying and also selling them. They discuss the quality angle between differently priced products without much involvement into that part of the industry.

So why not answer the question if you are qualified to supply it? Axe-grinding about how unqualified opticians are, on and opticians' board, clearly isn't getting much traction.

Rafael, thanks for the info.

[MakeOptics]

Hello Essegn, and all interested in thin films:

i´m sure that also here you will get an answer. But MakeOptics is right you should go for thin film related question to another forums, you will get faster a reply.
On linkedin.com there are several forums:
For example:Coating and Processing Systems


Contact Dave Taddeo, he publish some really nice webinars and can answer your questions.

Here the link to the webinar on youtube:

Episode 1: http://www.youtube.com/watch?v=nvDoybTJlks


Episode 2: http://www.youtube.com/watch?v=U9ou0R3RbWE


Episode 3: http://www.youtube.com/watch?v=LiaX3AujQWY


Episode 4: http://www.youtube.com/watch?v=74cqQpehY2E


Episode 5 http://www.youtube.com/watch?v=H47BncWv9jk

Software used in his webinar for free:
http://www.ftgsoftware.com/fsindex.htm

Have Fun
Rafael

Rafael,

Great info. Thank you.

[essegn]

Rafael, it is nice to see that among a lot of trash is one great reply!

[Chris Ryser]

So why not answer the question if you are qualified to supply it? Axe-grinding about how unqualified opticians are, on and opticians' board, clearly isn't getting much traction.

Dan..........I have never been qualified to give any technical hands on answers on AR coating applications or modifications, and have never said so. I do know a lot about Hydrophobic coatings and stripping AR coatings which is the only practical involvement I have in that field.