[RASMB] sapphire windows

[Ian Taylor]

Dear Rasmbers
	Does anybody know whether sapphire windows for the XLi interference  
optics are required be cut with the C axis of the crystal parallel to  
the window face, elimination of birefringence effects?

ian

Dr I A Taylor
Division of Molecular Structure
National Institute of Medical Research
The Ridgeway
Mill Hill
NW7 1AA
tel 0208 816 2552
fax 0208 816 2580
email itaylor at nimr.mrc.ac.uk


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