THE FIRST AND DOUBT’ our first mirror, We just completed the polishing stage and we have now reached a good sphere. The question at this point blend into the head of someone about to start his first parabolizzazione is: “really just do a little’ of “zigzag” to get to the parable ?” We seek
PART FOUR AND LAST: NOTE: Clicking on the images You gets his magnification, often helpful to appreciate the details that are in practice the object of this work. Today is the 7 March 2009 START I start polishing the amateur work abandoned 4 February for "paid" business reasons . Resume in hand then the mirror whose
PART THREE, of FOUR: 5 February 2009 PREPARATION OF POLISHING TOOL : Returning to practice to cover the tool with "candy squares of pitch", to be pasted on the same, with simple local and light softening one facet of the squares with a candle flame,, and then fixed in position on the glass with a little thumb pressure;, You may want to read my article with various photographs on this
SECOND PART, of FOUR: The February 2 start polishing abrasive 320 medium grain size 30 microns. The reference text indicated in the first part to the point (2) Realize your telescope di e Karine Jean-Marc Lecleire; to their page 152 says that the grain 240 (…abrasive corundum) need 3 hours and 15 of
PART ONE, of FOUR: This work is made transcript (I hope) readable, relative to notes taken in pencil in my “"grattavetro" Diary” during the construction of the mirror installed in my lightweight Travel Dobsonian Telescope, in photography. Notes that are usually taken, for myself, as with the passage
The pitch tool is an indispensable tool for polishing and parabolizing an a mirror telescope and is therefore useful to have a practical guide that tries to illustrate how to proceed to achieve it. First, it is good to have in mind all the steps necessary for its creation so as to proceed smoothly with the work, as a
We have seen how the past with W races constitutes one of the most effective methods for the approximation of the parabola starting from the spherical surface. Let us examine some variations of this technique to accentuate or diminish the effect of the processing in some areas of the surface. The W race presupposes a constant displacement and linear , orthogonal to the direction
Iron oxide “Rouge”
Is’ was one of the first polishing abrasive used by opticians , its properties make it still one of the best polishing agents ,but some contraindications have decreed the abandonment in favor of other products , luck in the iron oxide optical processing is finished with his fame at the beginning of chemical production
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