Re: TECH-3D digest 194

[T3D <vidi@xxxxxxxxxxxxx>]

On 08/05/97 22:54:21 you wrote:
>>   Dichroic Sheet Polarizers have an Extinction ratio
>> of 10,000:1 for White light!  .........
>>
>>
>> John Vala
>>
>Does this type of polariser work with normal polarising glasses? $64.00 per 1 inch clear
>aperture is quite expensive, how does this take the heat ?
>
>Where could I get some for a test?
>
>Henry Chung
>http://www.pac.com.hk/world/henry/


   The output of these polarizers is linear (as opposed to circular)
so they will work with your typical polarizing glasses.  I'm not sure 
how they will take the heat (how much heat will there be? We don't know),
but to quote the catalog "Our polarizers are made of a Dichroic Polarizing 
Sheet sandwiched between selected strain-free glass plates.  Because 
dichroic materials function by selective absorption, they cannot be used in 
high power laser beams"......  Well, we're not using high power lasers but 
you get the idea about heat. I wouldn't think they'd get a whole lot warmer 
than lower quality polarizers placed over the outside of a projector lens 
where outside ambient air is continuously circulating over it.

   For ordering information contact Melles Griot 800-835-2626 in Irvine, CA

--Dichroic Sheet Polarizers--
 Clear     Product
aperture   Number     Price
26.5mm   03 FPG 003   $64.00
38.4mm   03 FPG 005   $83.00
45.4mm   03 FPG 007  $114.00
58.0mm   03 FPG 009  $147.00


John Vala


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End of TECH-3D Digest 195
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