In this short article, I would like to start introducing the Hartmann test, beginning to describe the principles of operation, the merits and defects, paving the way for further developments and modifications to be able to easily use on the part of us amateur accomplishments during grattavetro. The Hartmann test was invented by Hartmann (1900) per
Is’ born in 1939 and it serves to measure with extreme precision (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 the zones of a parabolic mirror, or even more deformed figure from, a very short focal ratio (that is more inferior to F5) and a beyond the diameter 300 or
The subject self-build a telescope, at a certain point of its progression it leads to make concatenated choices, where the pupil of the eye conditions the determination of the minimum magnification with an eyepiece "telescope finder" or wide field; from which it is derived the design of the full light field" (Field Of View) be prepared, and then the
In order to facilitate an excellent evening observing through a telescope, We know that this must be in perfect conditions of stability, and collimation and thermal equilibrium. This last issue will be analyzed in this post, to highlight what are the main parameters affecting the optics acclimatization time, the possible measures to improve the problem and
The documentation on this interesting recent optical tests appeared on the Internet in the different languages of the countries where it is more widespread self-amateur optical construction. So a text in Italian, there is currently not existing. therefore, being I curious and “insider” I thought to translate into Italian, I use and people like me
Hartmann test (simplified by Mirco)
As mentioned in the preceding article (Hartmann test) in this post I describe the method which I have recently begun to be used to test the optical during processing and which is based on the Hartmann test. In the mirror parabolizzazione phase, in particular the last stage of refinement of the shape of the surface it is necessary to know with precision
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