Mirror 610 F3 meniscus
The manufacturing phases of a meniscus parabolic mirror 610 mm in diameter and 20 mm thick, focus 1770 mm with focal ratio of F3.
Rotating table for meniscus mirrors
A simple rotary table for working mirrors, homemade with some carpentry tools…
Self-construction of the mirror and Ø400mm F6 telescope with video tutorials by John Dobson (spoken in Italian)
John Dobson (1915-2014), It is known around the world for his astronomical work "missionary" in regard to the popularization of astronomical observation of the sky […]
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
how to parabolize a low focal ratio mirror ( F2-F4 ) - second part
Is’ useful at this point, a recall on processing techniques with the tools at the sub-diameter, in particular how it is possible to increase the curvature of one or more zones. Then resume the concept according to which through sub-diameter strokes , External areas increase their curvature while those inside the decrease,
how to parabolize a low focal ratio mirror ( F2-F4 ) – first part
STARTING BALL AND FINAL PARABOLA the reflection of light emanating from infinity on a spherical surface does not generate, as it is known, a single focus point, but rather a figure that “caustic reflection” which identifies the rotation surface where they concentrate the reflections of a point source . As you can be seen in Figure
First Parabolizzazione: techniques and focal ratio, how to make the right choice ?
THE FIRST AND DOUBT’ our first mirror, We just completed the polishing stage and we have now reached a good sphere. The question at this point blend into the head of someone about to start his first parabolizzazione is: “really just do a little’ of “zigzag” to get to the parable ?” We seek
how to parabolize a low focal ratio mirror ( F2-F4 ) - Part Three
Now let's see how to develop a procedure that takes account of the problems highlighted in the article II, that is how to generate the project by means of a parabola working as regular as possible, with particular attention to the control of the figure during the intermediate stages of processing. THE METHOD “CUSTOM” The name only want to indicate they are not
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