At 8:43 AM -0800 1/1/98, Paul Goelz wrote:
>>The circuit my friend developed simply uses a pair of ordinary transisters
>>to sense the difference in temperature between the air and the corrector.
>>
>>---
>>Bill Arnett
>
>Did he solve the problem of how to sense corrector temperature without
>touching it or obstructing the optical path?

No. I'm not sure why you care about not touching it. But there are
several approaches that might work:

1. Mount the sensing transistor on the corrector and don't worry about the
tiny obstruction that would result.

2. mount the sensor on the retaining ring that holds the corrector perhaps
with something that improves the thermal conductivity

3. mount the sensor on the edge of the corrector (the curved part); this
would be tricky since there isn't much room in there

---
Bill Arnett "Science is a way of trying
San Jose, CA USA not to fool yourself." -- Feynman

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