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Theoretical tool movement required to diamond turn an off-axis paraboloid on axis
Author(s) -
D. C. Thompson
Publication year - 1975
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/4069814
Subject(s) - paraboloid , diamond , diamond turning , reflector (photography) , turn (biochemistry) , optics , computer science , mechanical engineering , physics , engineering , light source , geometry , mathematics , materials science , machining , surface (topology) , nuclear magnetic resonance , composite material
High-quality, off-axis parabolic reflectors, required by the CTR and laser-fusion programs at Lawrence Livermore Laboratory (LLL) and other ERDA laboratories, are currently manufactured by hand. There are several drawbacks to this method, including lead times of up to a year, costs in excess of $75,000 for a small reflector, and unsatisfactory limits to the tolerances obtainable. This situation has led to a search for cheaper and more accurate methods of manufacturing off-axis paraboloids. An alternative method, turning the workpiece about its axis on a diamond-turning machine, is presented, and the equations describing the necessary tool movement are derived. A discussion of a particular case suggests that the proposed technique is feasible. (auth

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