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
Before starting any mirror processing phase, it is essential to make sure that the edges of both mirror that tool are blunted. This precaution is essential to minimize, during processing, the risk that by the sharp edge of one of the two discs coming off a flake that can slip between the two
La pass with races “W” It is the main technique used in the process of parabolizzazione. Normally it runs with mirror above and below the tool, It can also be applied in some cases with inverted positions. The position of the hands is the one with the palm which rests and pushes from the edge to "hours 8:20"And your thumbs facing the center to
Support for the mirror, necessary for the proper positioning of the same during another test is not that any device able to keep it in a safe and in a vertical position. The support can be seen as the assembly of 5 distinct elements: Panel or carrier rear structure lower supports for the support of the
Anyone using a terrestrial or astronomical telescope uses it to enlarge, ie virtually bring an object that is at a great distance, to observe it in minute detail as possible to their own observation instrument. A telescope is capable of receiving the parallel light rays that originate from the object under observation is, to form a
Is’ the day “zero”, one in which it is decided to start the processing of its first mirror. Everything's ready: a transparent glass disk is lying on her pretty stable support, restrained but not too much by three wooden dowels. We seize another glass disc uncut and, coarse carborundum hand
Past 1 / 3D c.o.c, alias the forward-backward centered race (or, all’americana: “center over center”), processing for abrasion, amplitude equal to one third of the mirror diameter, in which scratching of the glass is used to make a mirror (for example parabolic) is, with patience, UNIVERSAL WINNING WEAPON. Like the: The acquired new life
DESCRIPTION La pass with racing 1/3 center over center ( shortened: COC = “C. o. c.” ) is the classical stroke, the most widely used because it can be applied in all stages of processing both with the mirror above and below the tool, than vice versa. The position of the hands is the one with the palm that supports and pushes
DESCRIPTION The past is the chordal excavation technique more aggressive and effective towards our mirror. In fact it allows to remove a large amount of material in a shorter time compared to the other past. On the other hand is a technique that does not allow to obtain a regular shape, It should therefore be used only in the initial stages of blanking and up
