Lots of resources online for making spherometers and Foucaults, however pretty much every design assumes the maker does not have access to a well equipped machine shop. I'm getting popsicle sticks and razor blades etc.... Since I am a machinist with his own shop, i think i can do better than most, once I get a good design happening. I have dial indicators and micrometer heads but I don't have a good idea about the dimensions of these instruments.I am going to be grinding my first mirror and am tentatively planning a 14 inch F6..... i am told that would be a nice general dob and i already have a 10 inch. I read that ring spherometers are superior to the kind with 3 legs, but have 3 carbide legs on reserve, just in case someone talks me out of that.
As far as the Foucault goes, I can't even find any professional designs at all. What size is the optical slit ? How much adjustment does the slit need ? Do i put together an X-Y table and if so how much travel do I need on each axis ??
Metric or Imperial... makes no difference to me, but I'm leaning metric.
Any suggestions ?
Thanks gang !!