Get smart..........................
Quote:
Originally Posted by
snowmonster
BTW, Lenny, what edger are you using?
It is not a matter of what edger you are using, they all clamp the lens with pressure.................you can compare the slick coat to the coating on paper backing for self sticking postage stamps. The glue will not stick on it.
The only natural and reasonable, least expensive solution is to purchase the lenses without the slick coat......................cut the lenses the normal way without slippage..............and then apply the slick coat yourself after edging.
Quote:
Maybe Chris can stuff some MgF2 into a can of hair spray and invent a new way to apply it?
Magnesium Fluoride can not be stuffed into a spray can, it has to be evaporated in a vacuum chamber. Just look at the periodic table that contains all the possibilities you could add to a lens at http://en.wikipedia.org/wiki/Periodic_table_%
Magnesium fluoride has been evaporated and used for AR coatings forever, and I dint think you can patent a process that is old.
The slick coat when applied before edging will be a problem for the optician for a long time to come.
However a polysiloxane from Dow Corning we use and adapt to be applied chemically instead under vacuum will do the same trick as all the other slick coats applied in factory under vacuum.
This chemical applicationalso has a feature that none of the factory applied slick coats have:
Ant-Fog (disspates fogging in 8 seconds)
Anti-Static (no dust attraction)
To conclude I do not see any slippage problems if you are properly organized and can provide the same service for a lot less.
We have zero slippage issues with hyrdo coatings!
:finger:
Quote:
Originally Posted by
Chris Ryser
It is not a matter of what edger you are using, they all clamp the lens with pressure.................
The slick coat when applied before edging will be a problem for the optician for a long time to come.
As a matter of fact the equipment used makes all the difference in the world; does any 10 year old edger process trivex with hydo and not have slippage- I DOUBT IT!
The newer machines have variable feed rates by material and motor speeds that are specific to materials; this combined with a "soft" mode eliminates most problems.
We have upgraded our wheel to one from SuperAbraisive and use the hydro pads on the block and a clear one on the back of the lens. We almost never use the "soft" mode since we changed the roughing wheel.
The only problem I see with slick coat's is for those who don't upgrade the equipment processing the lenese to keep up with technology.
By the way, we process 70% Phoenix trivex and 100% of our lenses used have a hydro coating on them. This is the toughest combination for any equipment to process and we use our ME-1000 with no slippage.
You have some great knowledge;
It would be nice if you looked to provide solid reasons to utilize new technolgy and not knock it. Most people reading this forum want solutions; not excuses for failure to accept new technology.
The more help we can provide each other, the better chance we all have of success.
Craig
AR Committee Meeting at 2006 VEE
I attended a meeting hosted by the AR Committee and the VCA at VEE in 2006.
The open meeting was a set up as a forum to share what could be shared on edging super slick AR lenses. There was a mix of labs (independent and retail), lens manufacturers and the industry equipment and consumable suppliers.
What became clear, is that the optical industry is at a crossroads not seen since the introduction of CR39 plastic lenses that crashed the mineral glass party in the 1970's.
Several independent lab principles stood up for the uncut market, a big part of their business. Something had to be done to help this group otherwise the only uncut business will be in CR39 and Poly, maybe with a basic AR.
There is no silver bullet. The discussions got heated, ebbed and flowed, but in the end the consensus was todays edgers need to be able to handle new lens materials but also new lens treatments. The materials and treatments are not likely to be friendlier than what we have now.
I had dinner with an east coast lab principle at VEW. He told me about the new automation in his lab. The edgers adjust to the type of lens material, AR and frame specifications...all from reading a barcode. His yields are paying for the equipment.
Jim
No more special pads as well as essilor patent...
...since a company based in FL USA has developed a new product that is spin coated onto coated lenses with, as a last layer, a SuperHydrophobic material.
The Essilor patent includes every kind of transparent coating applied over a Super Hydrophobic material to make easier the edging... where is the trick? Easy, the spin coated material is colored... and it could be easily removed whashing the lenses after the drilling, the edging and the mounting.
Bye bye.
No slipping..............
Quote:
Originally Posted by
LENNY
Chris did you came up with something like that yet?
We are still looking to find something easy to work with and that works.
However if you are in a help desoerate mode you can always get a hydrophobic top coat solution......................order your lenses without it..............put the lenses through edging and just before mounting them into the frame you dip them into the solution and that's it, they will air cure in a couple of minutes..
No turned lenses, no slipping besides that, you save big bucks on every job.
http://optochemicals.com/products/info_easyclean.htm
http://optochemicals.com/products/in...easyclean1.htm