Rotating table for meniscus mirrors
A simple rotary table for working mirrors, homemade with some carpentry tools…
Centrifugal casting (spin casting) epoxy mold for convex core in collapsing refractory (slumping) for meniscus blank.
The escalation towards the amateur construction of ever more powerful Newtonian Dobsonian reflector telescopes (thanks to parabolic mirror lenses of ever larger diameter trying to contain their weight) it collides head-on with some technical problems that grow exponentially with respect to the benefits provided.
Making a Blank Meniscus 406 F3,7 on refractory plaster mold
I refer to the following Michael Davis Youtube video that I have seen with interest and attention, also thanks to the “lock-down” impediments, fortunately so far in good health, successive in these times of crown virus, also considering that the English language dialogues of the films, constitute in Italy an obstacle for all willing and maybe scratch glass
Simulator (not only) polishing parabolic mirrors (POLSIM Software)
Small tutorial on using "minimum" of POLSIM software for the processing of a parabolic mirror telescope, "Assisted" by the use of a simple rotating plate, even in the digging operation of the "arrow" of the initial spherical concavity. The program was written in 2007 da Martin Cibulski, and it can be downloaded as polsim.exe (download) , as other interesting Articles
How to read the fringes of Newton and correct the convex mirror.
As we have seen in this article, a convex secondary mirror can not be tested directly in general (*) . One of the methods is used to refer to a concave mirror which has the same shape of the surface that we want to get on the convex mirror. By overlaying the two mirrors, the analysis of the interference fringes by means of
The telescope mirrors are made all glass ?
The material issue to be taken to build one for telescope mirror is quite fascinating. If you start from a hypothetical initial question (of which we do not know a priori the solution) which is: If you have to build a mirror for a telescope, what material is more convenient to do so? The most obvious answer and obvious that
Building a secondary mirror Cassegrain (J.Texereau)
ITALIAN TRANSLATION OF CHAPTER 8 THE BOOK "THE CONSTRUCTION OF THE AMATEUR TELESCOPE" Jean Texereau (NOTE: For French speaking readers, it is advised to read this article directly on the book he also took again, (pages 137 – 149) to avoid mistakes due to the double automatic translation). The main difficulty of the construction of a telescope in a combination
Tutorial video: Construction of a parabolic mirror 200F6
EASY CONSTRUCTION OF MIRROR-GOAL ONE NEWTON 200-F6 FOR TELESCOPE If you are a fan of DIY, investing 116 minutes of your time to see the movie that follows this presentation, You'll be able to figure out if it can be of your interest and within your reach make a newtonian telescope mirror, with 200mm diameter
Building a Ritchey-Chretien: preconditions
And, it's possible to do it (*) by manually working the optics and you don't need special equipment or more sophisticated than what we normally use for the construction of a parabolic mirror but, let us now, to embark on such an adventure necessarily have to have more than one working behind, to understand how to generate two hyperbolic surfaces, and
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