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Originally Posted by IanW
Hi Bird,
Just a thought.
Have you considered going the chilled liquid route for cooling the mirror? I used such a method to cool a Medium Format "cold" camera over 20 years ago.
On the bonus side, you could use a 2-3 stage Peltier pump.
Cheers
Ian
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I've thought about it, mainly because I could separate the cooling stage (refrigerator) from the main body of the scope and save some weight. I would probably use a jacket that enclosed the rear and side of the mirror with a gasket of some sort to seal around the edge near the front surface.
Wasn't sure what coolant I would try, some light oil or water + antifreeze. Need to be sure that it doesn't affect the mirror chemically.
The down side is that it is not as portable as the current setup, and anything with liquids is messy...
cheers, Bird