As mentioned in the above article (Hartmann test) in this post I describe the method that lately I've begun to use to test the optical work in progress and that is based on testing of Hartmann. During mirror parabolizzazione, especially in the last phase of refining the shape of the surface it is necessary to know precisely […]
In this short article, I would like to start introducing the Hartmann test, beginning to describe the principles of operation, the pros and cons, paving the way for further developments and modifications in order to use it easily by us candid grattavetro during the realizations. The Hartmann test was invented by Hartmann (1900) for […]
it is'’ born in 1939 and used to measure very accurately (impossible to Foucault test for reasons which we shall see here later looking at the title: REASONS WHY THE FOUCAULT TEST IS INACCURATE FOR LOW FOCALS RATIOS MIRRORS)) the radii of curvature of a parabolic mirror, or even more deformed figure from, a very short focal ratio (that is more inferior to F5) and a diameter over 300 or […]
The argument self-construction of a telescope, at some point in its progression involves making choices that are concatenated, where the pupil of the eye conditions the determination of the minimum magnification with an eyepiece "telescpe finder" or wide field; from which the dimensions of the field of bright light (Field Of View) provided by others, e quindi la […]
In order to encourage an excellent telescope observing evening, you know this has to be in perfect conditions of stability, Collimation and and thermal equilibrium. The latter issue will be analyzed in this post, to highlight what are the main parameters that influence the time of acclimatization of optics, i possibili accorgimenti per migliorare il problema e […]
Documentation about this recent and interesting optical test appeared in internet in several languages of the countries where it is most prevalent l & #8217; self-optical construction amateur. Then a text in Italian, there is currently not existing. Therefore, being I curious and “Insider” I thought to translate into Italian, in my use and people like me […]
