[RASMB] sapphire windows

[Leech, AP]

Hello all,

I did not realise the ticks on the sapphire windows are aligned with
optical axes of the material - I assumed they were just handy marks
for reproducibility of alignment. Does this make any noticeable
difference to the fringe patterns?

The quartz windows also have tick marks - do these have any special
significance?

Andrew


Walter Stafford wrote:
> These windows should be cut with the z-axis perpendicular to the window 
> face. And the x-axis should be marked usually with a short metalized line.
> 
> Ian Taylor wrote:
>> 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 <mailto:itaylor at nimr.mrc.ac.uk>
>>
>>
>>
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>>
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>>   
> 

-- 
Dr Andrew Leech                   *  Laboratory Manager
Technology Facility               *  Molecular Interactions Laboratory
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