NASA NTRS · 19730000468
Fine guidance for a spaceborne telescope
Abstract
Two transparent plates are mounted at equal and opposite angles in secondary optical-system housing, angles being set for optimum astigmatism correction. Rotation of secondary housing assembly and translation of detector are proportional to angular position of secondary image. Combined movement of two retains image within sagittal foci of secondary system.
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Rosin, S., Amon, M.. 1974-03-01. Fine guidance for a spaceborne telescope. https://ntrs.nasa.gov/citations/19730000468
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