[time-nuts] beryllium oxide

Brooke Clarke brooke at pacific.net
Fri Jan 16 16:51:19 EST 2009


Hi Bruce:

Thanks for the MDA Technology link.  I didn't know that Beryllium was used to 
make mirrors and their metering structures for space apps.  It sure sounds like 
  the best material for that use.  I'd bet that's how spy sat mirrors are made.

Have Fun,

Brooke Clarke
http://www.prc68.com

Bruce Griffiths wrote:
> Bruce Griffiths wrote:
>> Poul-Henning Kamp wrote:
>>   
>>> In message <4970E72D.1050300 at rubidium.dyndns.org>, Magnus Danielson writes:
>>>
>>>   
>>>     
>>>> I have encountered Beryllium in a field none of you mentioned, as 
>>>> material for speaker cones. Light and very rigid. Perfect for the top 
>>>> driver for horns. I recall something about high speed of sound.
>>>>     
>>>>       
>>> It is also used for mirrors for certain, usually classified,
>>> applications.
>>>
>>>   
>>>     
>> One unclassified application is the 1.12m diameter secondary mirrors of
>> ESO's 4 VLT telescopes in Chile.
>>
>>
>> Bruce
>>
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>>   
> For additional applications in some classified and unclassified programs:
> 
> http://www.mdatechnology.net/techprofile.aspx?id=175
> 
> An application for breyllium mirrors at  CERN:
> http://cdsweb.cern.ch/record/944244?ln=no
> 
> Bruce
> 
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> 





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