[ATM] easiest parabolization, thermal or ???
mbartels at bbastrodesigns.com
Sat May 8 02:14:47 JST 2010
Even the heat warp, which I'm 99.999 percent sure won't work
Feels like I've been doing this experiment on a nightly basis for 50 years,
as I setup my scope in the cold night air.
I think that somehow, a lot of people in the scope making world have formed
the idea that the final figuring on a mirror was extremely hard.
Figuring can be easy. Let me put it this way - there's little reason for it
to be hard. The key for me is to think, "process".
1. 'observe' or measure the mirror's shape
2. 'orient' with the three radius of curvature possibilities
3. 'decide' on polishing strokes: duration, pressure, lap shape, et al.
4. 'act' by carrying out the polishing
5. repeat by observing consequences: record the results - what polishing
action resulted in what mirror shape?
I was about to say that I see amateurs have the most difficulty with steps 1
and 2. As I think of it, I see amateurs occasionally troubled by all 5
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