WHAT YOU NEED A FOUCAULT TESTER: For those who still do not know; It serves to apply the Foucault test on an optical surface, parabolica, reflective, under construction, to infer the fixes to be implemented in order to bring it in to a most high quality. Given that in a parabolic mirror, the radius of curvature of the surface increases
With the previous article we saw the mirror 200F6 working with parabolization's corrections derived from five successive retouch actions and following Foucault tests controls. With this article we will see the remaining 5 tweaks that will bring us to the end of the mirror processing. Obviously, this continues to be a realistic simulation of the cases in which
Now that, with previous articles we did a little 'light on the road to complete the construction of a mirror, we walk that way "that becomes increasingly narrow and challenging" parabolizing slowly with a slow progression of quality. Obviously this is a simulation of what would happen in reality, but it is
WHY’ STUDY WHAT MANY SOFTWARES OFFERS’ READY TO USE The study of the Foucault test results is very important in order to be able to evaluate the advice provided by the software prepared for this calculation independently and well. Nobody is perfect and even programs for these calculations are, while he is able to guide
As described in the previous article entitled "Preparatory phase to Foucault's test", We have prepared the room, with mirror aligned and testers on their tables and stands, left to acclimatize the mirror to reach the safe thermal equilibrium with the ambient temperature, and now we are ready to begin the first test session. take the
NOTE for those who are going to read this article already having previously read the two articles 1) “FOUCAULT TEST; what is it and how to function” e 2) “Setup del test in Foucault”, it will be interesting to find an answer to the question that arises spontaneously, which is: “But when the test should begin to perform
The TEST AMATORIALI The need to perform the tests on the optical processing in, typically with parabolic reflective surface for Newtonian telescopes, It is designed to be able to see them with the presence of any of the relevant mirror surface shape errors, and of these errors get the QUANTITY ', in order to study and apply
For those looking for ideas to gear up realizing what it takes to lead the Foucault test, I present a gallery of images of my way to work. The environment must be a room with the temperature as constant as possible, and a length of at least a meter and a half more than twice the focal length
The WHAT, the reason why', the WHEN and HOW: Let's start from WHAT: The Couder mask is a technical tool of cardboard, or other stiff and Matt material, that prepended to the parabolic mirror in construction to perform on it the Foucault test, It serves to measure the radius of curvature Rdc of the various annuli
A Foucault Tester, with fixed light source fixing to be carried out with devices which commonly have at home (webcam and a pen / USB stick ) screwdriver , hacksaw and simple components purchased from Brico with little expense. below of the components you found the exploded, assembly instructions, list of materials and some support attachments.
