Hi Tomasz
Thank you for your response. Clearly I must stick with the BaF2 windows.
Regards
Kevin
>Coating on optical components is required to minimize reflections.
>Transmission through window coated for a specific wavelenght may be
>significantly improved when compared to the uncoated one. ZnSe does
>react with BrF5 in case of CVD polycrystalline material, which is the
>most common (or even maybe the only one in use? Is anyone out there
>using single crystals?). Grain size during the CVD deposition process is
>controlled to give maximum material strenght, not resistance to strong
>oxidants. It is quite possible that the rate of reaction would depend on
>the grain size and therefore the resistance to BrF5 may vary between
>manufacturers. Generally, it looks like ZnSe is perfect for IR
>applications in inert atmosphere, but not for fluorine compounds.
>
>Cheers,
>
>
>Tomasz
>
>****************************************************
>Tomasz Durakiewicz
>Los Alamos National Laboratory
>Condensed Matter & Thermal Physics Group
>Mailstop K764
>Los Alamos
>NM 87545 USA
>Phone: 505 667 4819
>Fax: 505 665 7652
>official e-mail: [log in to unmask]
>private e-mail: [log in to unmask]
>
>TSPA/CORRESPONDENCE
>****************************************************
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