- blink comparator
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an optical instrument used to detect small differences in two photographs of the same field or object by viewing them alternately, switching rapidly from one to the other.[1925-30]
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Universalium. 2010.
blink comparator
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Blink comparator — A blink comparator was a viewing apparatus used by astronomers to find differences between two photographs of the night sky shot using optical telescopes such as astrographs. It permitted rapidly switching from viewing one photograph to viewing… … Wikipedia
Blink comparator — Comparateur à clignotement Comparateur à clignotement de l Observatoire Lowell utilisé lors de la découverte de Pluton. Un comparateur à clignotement est un dispositif opto mécanique autrefois utilisé par les astronomes pour faire apparaître les… … Wikipédia en Français
blink comparator — noun : an optical instrument by means of which two pictures identical in all but a few details may be registered in a single visual field and viewed alternately in rapid succession * * * an optical instrument used to detect small differences in… … Useful english dictionary
comparator — /keuhm par euh teuhr, kom peuh ray /, n. 1. any of various instruments for making comparisons, as of lengths or distances, tints of colors, etc. 2. Electronics. a circuit for comparing two signals, as readings of duplicate information stored in a … Universalium
blink microscope — noun : a blink comparator in which the compared images are magnified * * * blink microscope, an instrument through which two photographs may be viewed in rapid alternation to check the alteration in position or movement of a star, comet, or other … Useful english dictionary
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Observational astronomy — Mayall telescope at Kitt Peak National Observatory Observational astronomy is a division of the astronomical science that is concerned with getting data, in contrast with theoretical astrophysics which is mainly concerned with finding out the… … Wikipedia
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