BOLOMETER

bōlŏmˈətər, bə–, instrument for detecting and measuring radiation, e.g., visible light, infrared radiation, and ultraviolet radiation, in amounts as small as one millionth of an erg. The bolometer was invented in 1880 by Samuel P. Langley. Basically it consists of a radiation-sensitive resistance element in one branch of a Wheatstone bridge; changes in radiation cause changes in the electrical resistance of the element. The radiation-sensitive element may be a platinum strip, a semiconductor film, or any other substance whose resistance is altered by slight changes in the amount of radiant energy falling on it.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Bolometer
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books on: Bolometer  - 63 results

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1.
The Smithsonian Institution, 1846-1896: The History of Its First Half Century
Book by George Brown Goode; Smithsonian Institution, 1897
Subjects: Smithsonian Institution--History
...new instrument, which he called the bolometer, -- a thermometer of almost infinite...and perfecting it. 1 The action of the bolometer is based upon variation of electrical...One of the earliest results of the bolometer work was the demonstration experimentally...
2.
Descriptive Meteorology
Book by Willis L. Moore; D. Appleton & Company, 1910
Subjects: Meteorology
...022. Bolometric Measurements. --The bolometer, or actinic balance , was devised in...Through a Wheatstone bridge device, the bolometer strips constituting two arms of the bridge...This is accomplished by inclosing the bolometer and the resistance coils forming the...
3.
Men of Science in America: The Role of Science in the Growth of Our Country
Book by Bernard Jaffe; Simon and Schuster, 1944
Subjects: Science--United States--History, Scientists--United States
...produced a new instrument which he named the bolometer . His paper on The Bolometer and Radiant Energy , published in 1881, remains one of the classics of science. The heart of the bolometer is a thin blackened thread of platinum which...
4.
Living Light
Book by E. Newton Harvey; Princeton University Press, 1940
Subjects: Phosphorescence
...the blackened surface of a thermopile, bolometer or radiometer. The amounts of energy...made by Langley and Very 1890 with the bolometer. The radiation from Pyrophorus which affected their bolometer was shown to be due merely to the "body...
5.
International Dictionary of Physics and Electronics
Book by Walter C. Michels; Van Nostrand, 1956
...occur. See law of Raoult. BOLOMETER. A very sensitive thermometric...radiomicrometer of Boys. When a bolometer tube is mounted as the receiving...or bands. Very sensitive bolometers have been constructed, making...resistance element is called a bolometer. BOLTZMANN CONSTANT. The...
More book Results: 1-10 11-20 21-30 31-40 41-50 >>

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journal articles on: Bolometer  - 1 result

 
 
1.
M. A. K. Halliday's Continuum of Prose Styles and the Stylistic Analysis of Scientific Texts
Journal article by William J. Vande Kopple; Style, Vol. 37, 2003
Subjects: Halliday, M A K, Linguistics, Literary criticism, Science, Writers
...steps was to use tense to set each one in time. Then they could relate the steps by means of different tenses (I "used" a bolometer, which my assistant "had prepared"), by means of conjunctions and adverbs conveying temporal meanings ( "After" we...


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magazine articles on: Bolometer  - 3 results

 
 
1.
Invisible, Incredible, Infrared
Magazine article by Steve Voynick; World and I, Vol. 15, June 2000
Subjects: Infrared astronomy--Research, Infrared radiation--Research
...development of the germanium bolometer, a thin strip of germanium...increased the germanium bolometers sensitivity. The supercooled germanium bolometer detected all wavelengths...adapted the new germanium bolometers to infrared telescopes...
2.
Growth in Uncooled Infrared Takes off
Magazine article by James P. Kraus; National Defense, Vol. 82, November 1997
Subjects: Infrared radiation, Sensors, Technology
...is less of a risk, he said. "Uncooled thermal imaging systems basically use one of two technologies: ferroelectric or bolometer," explained Homberger. "The largest installed base of systems in existence today have a ferroelectric core, which is...
3.
Vision Quest
Magazine article by Bennett Daviss; The Scientist, Vol. 18, May 10, 2004
...glasses with mounted camera feeding data to a clip-on processor, is possible thanks to something called a microbolometer. A bolometer is a device that detects far-infrared radiation, but the usual versions are bulky and operate at cryogenic temperatures...


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newspaper articles on: Bolometer  - 1 result

 
 
1.
Edinburgh, the Coldest Place in the Universe. Scientists Plan the Ultimate Chill-Out to Test New [Pounds Sterling
Newspaper article; October 11, 2006
...returns to the National Museum in Edinburgh next year. The original camera - its full name is the submillimetre common-user bolometer array - has been taking revolutionary images through the James Clerk Maxwell telescope near the peak of Hawaiis Mauna Kea...


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encyclopedia articles on: Bolometer  - 4 results

 
 
1.
Bolometer
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
BOLOMETER bolom t r, b , instrument for detecting and measuring radiation , e...ultraviolet radiation , in amounts as small as one millionth of an erg . The bolometer was invented in 1880 by Samuel P. Langley. Basically it consists of...
2.
Langley, Samuel Pierpont
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...Observatory there. He did much to popularize astronomy; his book The New Astronomy (1888) was widely read. He invented the bolometer, a highly sensitive instrument for recording variations in heat radiation, and with it measured the distribution of heat...
3.
Sun , in Astronomy
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...portion of the visible solar spectrum is the infrared spectrum; for the study of these heat rays S. P. Langley invented the bolometer, a highly sensitive electrical device for measuring temperature. Solar heat and energy are measured by an instrument called...
4.
Radiometer
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...thermal detectors. Commonly used thermal detectors include the thermocouple, which produces a voltage when heated, and the bolometer , which changes in electrical resistance when heated. Devices that can, in principle, detect a single quantum of radiant...


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