[Laser] Germanium coating for IR reflector is the best

Mon, 12 Aug 2002 14:06:20 -0400 (EDT)

	Ge is transparent to IR in some Wavelengths (abbreviated WL)
	Au or gold is a common IR reflector.

	A high end IR mirror in the ~ 10 micron may be made from an
	accurate metal form, say nickle, over plated with rhodium or an
alloy of same for toughness and then a final gold.   ANY coating will
	reduce reflectivity over all becasue the EM radiation must pass
through it twice.... UNLESS.... the mirror-coating is designed as a system
and manufactured for high efficiency at a specific WL.

	AND:		There will ALWAYS be exceptions to any general
statemnt, as the one, above.

On Mon, 12 Aug 2002, robotics wrote:

> Germanium coating for IR reflector is the best.
> 
> This sheet of any metal coated with Ge should work.
> 
> Some people use parabola mirrors for small IR furnaces to focus IR on
> object.
> 
> Shyam Sunder Tiwari, Ph. D.
> Managing Director
> Sensors Technology Private Limited
> AM-51 Deen Dayal Nagar, Gwalior, MP 474020, India
> Tel: +91-751-470680 Fax: +91-751-545716 Email: [email protected]
> 
> 
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