Quote:
Originally Posted by tlgerdes
Hi Marc,
If you gave us a bit more info about what you are trying to achieve or are planning to do with it, we might be able to give you more ideas about how to approach it.
As they say, if all you have is a hammer all problems look like a nail.
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I want to shine a light beam at very low indidence on the schmidt profile of a corrector plate so I can narrow down its true optical center as I cannot rely on its OD or ID. They're not concentric. I can do a good physical centering for the secondary with a cheap lazy suzan arrangement but I need something a lot more precise to do the above.