24 October 2000 Optomechanical design of primary mirror assembly for free gyro stabilized seeker
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In Free Gyroscopic Stabilized Seekers, the Primary Mirror has the multiple functions of a magnetic rotor, the primary rotating mass and the primary reflector for the optical train. The introduction of rare-earth magnetic alloys to this class of seeker has provided increased flexibility in materials selection, opto-mechanical design and cost of manufacture. Along with superior magnetic properties, the rare-earth alloy Neodymium-Iron-Boron (NdFeB) comes with the undesirable properties of anisotropic CTE, high susceptibility to corrosion and manufacturing challenges. This paper discusses the opto-mechanical design, structural and optical modeling and analysis of a primary mirror assembly utilizing an NdFeB insert with centrifugal, linear acceleration and thermal loading as well as the optical test results, qualification testing of long-term figure stability and validation of the mechanical/magnetic/optical design model.
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Brian J. Perona, Christopher L. Yarbrough, Steven Prill, "Optomechanical design of primary mirror assembly for free gyro stabilized seeker", Proc. SPIE 4093, Current Developments in Lens Design and Optical Systems Engineering, (24 October 2000); doi: 10.1117/12.405197; https://doi.org/10.1117/12.405197

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