Abstract
A lens placed in front of a detector that images the objective onto the detector. The image of the objective is a uniformly illuminated circle that does not move as the image of the object moves due to seeing or to tracking errors. The use of a Fabry lens therefore reduces the noise arising from such sources. Its use is also advantageous when using a detector, such as a photomultiplier, whose sensitivity may vary over the detector area.
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© 2002 Springer-Verlag London
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Kitchin, C. (2002). F. In: Illustrated Dictionary of Practical Astronomy. Springer, London. https://doi.org/10.1007/978-1-4471-0175-8_6
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DOI: https://doi.org/10.1007/978-1-4471-0175-8_6
Publisher Name: Springer, London
Print ISBN: 978-1-85233-559-5
Online ISBN: 978-1-4471-0175-8
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