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Books > Professional & Technical > Electronics & communications engineering > Electronics engineering > Applied optics
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Adaptive Optics for Astronomy (Hardcover, 1994 ed.)
Loot Price: R5,783
Discovery Miles 57 830
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Adaptive Optics for Astronomy (Hardcover, 1994 ed.)
Series: NATO Science Series C, 423
Expected to ship within 10 - 15 working days
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For many astronomers, Adaptive Optics is something like a dream
coming true. Sinee 1609 and the first observations of celestial
bodies performed with the help of an optieal teleseope, astronomers
have always fighted to improve the 'resolving power' of their
instruments. For a long time, engineers have trimmed the optieal
quality of the teleseopes, until they finally reaehed the barrier
set by the atmospherie turbulence, a few seconds of are. At that
point, the intrinsic quality of the site beeame a major issue to
establish new observatories with modern telescopes, and astronomers
started to desert the urban skies and to migrate toward mountains
and deserts. This quest has been sueeessful and a few privileged
sites, where the average natural 'seeing' is close to 0. 5," are
now hosting clusters of giant telescopes of the 4 m and soon 10 m
class. Yet, this atmospherie limit corresponds in the visible
wavelength range to the diffraetion limit of a 20 em telescope
only. The loss was severe: a faetor 20 in angular and several
hundred in peak energy eoncentration, i. e. in deteetivity of
resolution very faint objeets. In the beginning of the seventies,
two doors half opened to provide a way out of this dead-end. First,
the technique of speckle interferometry (and its various related
developments) has allowed to restore the diffraetion limit of large
telescopes at visible and infrared wavelengths (see, e. g.
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