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Subject: Re: Coatings

Date: 03/28/03 at 3:18 PM
Posted by: Vladimir Tchoutko
E-mail: info@vecorus.com, chutko@earthlink.net
Message Posted:

In Reply to: Coatings posted by J Clements on 03/28/03 at 10:17 AM:

I just would like to add... Once we are talking about optical coatings the transparent materials usually are used as thin film materials. The coloring of transparent and/or reflected light is the result of light interference in thin film layers deposited on the substrate surface. To obtain interference colors the substrate and thin films materials must have different refractive indexes and calculated thicknesses. For instance, depositing two layers system TiO2(high refractive index) + SiO2(low refractive index) on glass (low refractive index) you can obtain the different colors of reflected or transmitted lights (from blue to dark-red) depending on layers thicknesses.

Hope it helps also.

Best regards,

Vladimir Tchoutko

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