Can a mirror coating control UV?

[Craig]

I am working on a project that requires the level of UV protection to remain at a level of 420nm and cannot find RX blanks that offer that level of protection. Can we design a mirror coating to help make up for the lack of UV protection in the lens material?

Thanks in advance for the help.

Craig

[Yeap]

i think the UV protection level mainly rely on the lens material. also some lab at my place provide UV400 coat but that will definitely will cause the lens to be appeared yellowish. maybe you can check with your lab manufacture. thank you..

[Mauro.Airoldi]

You have two way, deep lens in Blu Blocker 550 (phantom) for 2-3' (lens became yellow. the second way is use e blu mirrow (max reflection is 75-85%).
the first way is less expensive and warranty a better result.

[Chris Ryser]

Craig .............around and above 400nm you are in the visible light and have to correct with colors, mainly yellow and orange.
Back to the drawing board....................

[Craig]

This project got me thinking of other ways to improve the UV protection on RX lenses; I contacted a few other experts and am no going to try something new.

I will keep you posted as to the success, it is going to take a few months to get started.

Craig

[HarryChiling]

This project got me thinking of other ways to improve the UV protection on RX lenses; I contacted a few other experts and am no going to try something new.

I will keep you posted as to the success, it is going to take a few months to get started.

Craig

Criag,

So far everyones suggestions has been to reduce transmittance by way of absorbtion (tint), but a mirror should technically be able to provide what you are looking for, I just don't know what the cost is (opticaly speaking) and you would probably want to incorporate some sort of back side AR to reduce the ghost images from flash mirrors assumeing that they can reflect enough of the 400 to 420 range in the first place. Keep us posted this sounds interesting.

[Craig]

Criag,

So far everyones suggestions has been to reduce transmittance by way of absorbtion (tint), but a mirror should technically be able to provide what you are looking for, I just don't know what the cost is (opticaly speaking) and you would probably want to incorporate some sort of back side AR to reduce the ghost images from flash mirrors assumeing that they can reflect enough of the 400 to 420 range in the first place. Keep us posted this sounds interesting.

I asked Chris Reyser- the tint guru- and he informed me that it would probably make the lens too dark. I am confident a tint-like application will be the end result. We need to ensure we can coat most lens materials, seal it in and add non glare and/or a mirror coating on top. We also want to ensure it does not change the appearance as it can be added to most lenses. We are targeting the transitions markets and sunglasses in rx and plano.
i will look at incorporating some form of mirror coating to help acheive some of the other color filters we are working to bring to market. The glasses are targeted to specific tasks and markets that will benefit from filtering specific colors while offering a transitons version as well.

I will keep you posted as we progress.

Craig

[Ian Jordan]

There are programmes that will allow the design of a dichroic filter - but empirical prescribing for special purposes may be a problem.

[Georg Mayer]

There is a commercially available astronomical Filter designed exactly to do this, the spectra can be found at:

http://www.baader-planetarium.de/sek...e_killer_e.pdf

You will also see that any filter, interfering within the visual spectrum (380-760) will affect the color balance, i.e. will not be colorless, please see images taken with such filters:




See also for further similar products.
http://www.baader-planetarium.de/sek...r.htm#englisch

PS I am not working for Baader, but as a keen astronomer I recognize and appreciate Quality.

Clear skies
Georg Mayer
Munich

[Craig]

This is exactly what I was thinking about; it just takes many layers to get the proper job done.
I have been working with Dr. Jim Gallas and would be curious to see your feedback on his work and how it may relate to what you just educated me on. He invented Melanin and Ocular Lens Pigment; the OLP is not available yet in comercial form, but we are close and want to utilize coatings to help create the ultimate night driving lens.
his websites are http://www.melaninproducts.com/ and www.ocularlenspigment.com

Craig

[Fezz]

Good stuff guys!
Thanks for sharing!

:cheers::cheers::cheers: