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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant scopes and an old-bold empiricist
From: Bill B
Date: 2006 May 4, 01:27 -0400
From: Bill B
Date: 2006 May 4, 01:27 -0400
George wrote: > If Bill would like to do a bit of reading, there's a nice little 1960 Dover > paperback, "Optics and Optical Instruments", by B K > Johnson, a reprint of his 1947 "Practical Optics", which has supplied much of > my own information. But bear its date in mind; it will > tell nothing about the considerable postwar developments of aspheric surfaces, > computer lens design, exotic optical materials, etc, > that have transformed the technology, mainly the result of Japanese ingenuity. George As always, a pleasure and learning experience. Thank you for the reference. Will try to locate it at a regional library. Bill
