photographic photometry

photographic photometry

See photometry.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Photometry, Photographic

 

the branch of photometry that deals with methods of quantitative evaluation of radiation by means of photographic materials. The methods of photographic photometry are used mainly when the intensity of the radiation being measured is low, for example, in astronomy.

REFERENCE

Mees, C., and T. James. Teoriia fotograficheskogo protsessa. Leningrad, 1973. (Translated from English.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

photographic photometry

[¦fōd·ə¦graf·ik fə′täm·ə·trē]
(spectroscopy)
The use of a comparator-densitometer to analyze a photographed spectrograph spectrum by emulsion density measurements.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Tom commenced his observing career with photographic photometry and later undertook spectroscopy, infrared photometry and infrared imaging.
Richard Hugh Stoy born; an English astronomer; studied planetary nebulae at the Lick observatory; undertook photographic photometry at the Cape of Good Hope observatory.
There he learned the theory and practice of photographic photometry. He joined his father at meetings of the AG and the International Astronomical Union and thus was introduced to international aspects of science at a very early age.
Conventional photographic photometry depended on measuring the diameters of star images but Fabry photometry involved spreading out the starlight evenly by means of a lens placed close to the image and focusing the objective of the telescope onto the photographic plate.

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