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Re: Mathematical principle of Soviet dipmeter
From: Alexandre Eremenko
Date: 2012 Apr 17, 19:12 -0400
From: Alexandre Eremenko
Date: 2012 Apr 17, 19:12 -0400
Dear Bill, > I have attached a couple of pages from Habell, J K and Cox, A. > Engineering Optics. London, 1953. These explain the principle. As it happens sometimes in our correspondence, there was no attachment in your message:-) But I am very interested in seeing it! (Almost everything that I know about astronomical instruments comes from the book of Chauvenet; it describes a micrometer, but this micrometer is based on a different principle! My first idea was that one can use this "Kavraiskii method" in micrometers, and I checked Chauvenet. What Chauvenet describes is called a "filar micrometer" and in it, the fine scale moves not a lens). And perhaps the method is too crude for real astronomical observations... Alex.
