Optics of the Cassegrain Telescope."..since the author believes hands-on work is crucial to truly understand the nature of the optical mirror, he devotes considerable space to explaining to the talented amateur how to produce a high quality mirror for home use...work will merit careful reading by all professional and student astronomers." |
Contents
Preface xi | 11 |
DESIGN OF THE CLASSIC CASSEGRAIN | 22 |
DESIGN OF THE RITCHEYCHRÉTIEN | 28 |
Copyright | |
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Common terms and phrases
12 inch lap 27 30 Reference 3-inch lap 30 Reference Parabola 61 inch 61-inch F/4 Paraboloid adjustment aperture arcsecs astigmatism Barnesite center of curvature central hole Chapter collimation curve cycle Dall-Kirkham Dall-Kirkham Telescope date 61-inch date Reference Parabola diamond wheel disk equation facets figuring depth flat focal ratio Foucault test give glass grinding grit high zone Hindle sphere improvement inch stroke inches diameter method mins NASA F/2 Paraboloid optical surface Optical Test optician overarm Parabola 60-inch NASA paraxial radius pitch plate position primary mirror readings red rouge Reference Parabola 60-inch Reference Parabola Surface removed Ritchey-Chrétien rotating round the hole screw secondary mirror shown in Figure Slope graph speed spherical aberration spherometer star lap store recall stroke Ath strokes per minute Surface at date surface of revolution Telescope thickness tiles Total polishing turned down edge turntable weight