Apotome

Apotome

Apotome may mean one of the following:

*In mathematics, apotome is the difference of two quantities that are commensurable only in power. An example is the difference:

:sqrt{2}-1,

which corresponds to the difference between the diagonal and side of a square.

*A Pythagorean interval, equal the difference between the tone and the limma.

*In life sciences, Carl Zeiss ApoTome is a trademark for a new technique to use a conventional fluorescence microscope to obtain stacks of confocal slices of an object.

The imaging principle used with the ApoTome is referred to in the literature as "grid projection" or "structured illumination". The fundamental theory was described in publications on interferometry as early as in the nineteen-sixties.A grid of stripes of defined width is projected onto the focal plane of the objective and shifted laterally in three defined steps relative to the sample (see illustration). A CCD camera takes a picture in each grid position. The three "raw" images are combined into a resultant image by on-line computation. The resultant image is an optical section through the sample, from which all image slices originate. Free of artifacts, with out-of-focus information removed. This image has an improved signal-to-noise ratio, and approximately doubles resolution in axial (Z) direction. Making an optical section is a prerequisite for computing 3D visualizations of specimens. [http://www.zeiss.com/C12567BE0045ACF1/ContentsWWWIntern/1268311E3AF7907AC1256C30004625B5]

References

*Webster's 1828 Dictionary
*1728 [http://digicoll.library.wisc.edu/cgi-bin/HistSciTech/HistSciTech-idx?type=turn&entity=HistSciTech000900240160&isize=L]


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Look at other dictionaries:

  • apotome — ⇒APOTOME, subst. masc. MUS. ANC. ,,Ce qui reste d un ton majeur quand on en retranche un limma. (Ac. Compl. 1842) : • On sait que la gamme de Pythagore comprend 5 tons de 51, 15 savarts (...) et 2 demi tons de 22, 64 savarts (limma, demi ton… …   Encyclopédie Universelle

  • Apotomé — Saltar a navegación, búsqueda El apotomé es un semitono cromático del sistema de Pitágoras, mayor que la limma o semitono diatónico. En este sistema, el tono se divide en dos partes desiguales: la limma y el apotomé. La medida comparativa de este …   Wikipedia Español

  • Apotome — A*pot o*me, n. [Gr. ? a cutting off, fr. ? to cut off; ? from + ? to cut.] 1. (Math.) The difference between two quantities commensurable only in power, as between [root]2 and 1, or between the diagonal and side of a square. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • Apotome —   [griechisch »Abschneiden«, »Abhauen«] die, / n, im pythagoreischen Tonsystem (Stimmung) der chromatische Halbton, der sich aus der Differenz zwischen dem großen Ganzton (Frequenzverhältnis 9/8 bezüglich der Prime) und dem kleinen Halbton… …   Universal-Lexikon

  • Apotome — Diatonische Intervalle Prime Sekunde Terz Quarte Quinte Sexte Septime Oktave None Dezime Undezime Duodezime Tredezime Halbton/Ganzton Besondere Intervalle …   Deutsch Wikipedia

  • apotome — əˈpäd.ə(ˌ)mē noun ( s) Etymology: Greek apotomē, literally, cutting off, from apotemnein to cut off, from apo + temnein to cut more at contemn in Greek music : the interval of a semitone in the Pythagorean scale that is slightly greater than half …   Useful english dictionary

  • apotome — n. [Gr. apo, away; tomos, a cut] A part or subdivision appearing as if separated from the whole …   Dictionary of invertebrate zoology

  • apotome — (a po to m ) s. m. 1°   Ancien terme d algèbre. Reste de deux grandeurs incommensurables dont l une est retranchée de l autre. 2°   Terme de musique ancienne. Partie du ton, tantôt plus grande, tantôt plus petite que le semi ton moyen. Les Grecs… …   Dictionnaire de la Langue Française d'Émile Littré

  • apotome — apot·o·me …   English syllables

  • Gamme pythagoricienne — Acoustique musicale Note de musique Harmonique Intervalle Consonance Cycle des quintes Gamme musicale Système tonal Échelle musicale Échelle diatonique Échelle chromatique Liste des gammes …   Wikipédia en Français

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