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abbenumber

abbe number

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There are 10 letters in ABBENUMBER ( A¹B³E¹M³N¹R¹U¹ )

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6 letters out of ABBENUMBER

AMBEER BARMEN BAUBEE BEMEAN BENAME BENUMB EMBRUE MANURE MEANER NABBER NUMBER RENAME UMBRAE UNBEAR URBANE

5 letters out of ABBENUMBER

AMBER AMEER ARENE BARBE BERME BREAM BRUME BUBBA BURAN EMBAR EMBER ENEMA ENURE NAMER NEUME RAMEE RAMEN RANEE REBBE REMAN RUMBA RUMEN UMBER UMBRA UNARM UNBAR URBAN

4 letters out of ABBENUMBER

3 letters out of ABBENUMBER

AMU ANE ARB ARE ARM BAM BAN BAR BEE BEN BRA BUB BUM BUN BUR EAR EAU EBB EME EMU ERA ERE ERN MAE MAN MAR MEN MUN NAB NAE NAM NEB NEE NUB RAM RAN REB REE REM RUB RUE RUM RUN URB URN

2 letters out of ABBENUMBER

AB AE AM AN AR BA BE EM EN ER MA ME MU NA NE NU RE UM UN

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Definitions of abbe number in various dictionaries:

ABBE NUMBER - In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material's dis...

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Abbe number description
In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material's dispersion (variation of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist who defined it.* The Abbe number, VD, of a material is defined as * * * * * * V * * D * * * = * * * * * n * * D * * * − * 1 * * * * n * * F * * * − * * n * * C * * * * * * , * * * {\displaystyle V_{D}={\frac {n_{D}-1}{n_{F}-n_{C}}},} * where nD, nF and nC are the refractive indices of the material at the wavelengths of the Fraunhofer D-, F- and C- spectral lines (589.3 nm, 486.1 nm and 656.3 nm respectively). * Abbe numbers are used to classify glass and other optical materials in terms of their chromaticity. For example, the higher dispersion flint glasses have V < 55 whereas the lower dispersion crown glasses have larger Abbe numbers. Values of V range from below 25 for very dense flint glasses, around 34 for polycarbonate plastics, up to 65 for common crown glasses, and 75 to 85 for some fluorite and phosphate crown glasses. * * Abbe numbers are used in the design of achromatic lenses, as their reciprocal is proportional to dispersion (slope of refractive index versus wavelength) in the wavelength region where the human eye is most sensitive (see graph). For different wavelength regions, or for higher precision in characterizing a system's chromaticity (such as in the design of apochromats), the full dispersion relation (refractive index as a function of wavelength) is used.

Abbe number description

In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material's dispersion (variation of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist who defined it.* The Abbe number, VD, of a material is defined as
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* {\displaystyle V_{D}={\frac {n_{D}-1}{n_{F}-n_{C}}},}
* where nD, nF and nC are the refractive indices of the material at the wavelengths of the Fraunhofer D-, F- and C- spectral lines (589.3 nm, 486.1 nm and 656.3 nm respectively).
* Abbe numbers are used to classify glass and other optical materials in terms of their chromaticity. For example, the higher dispersion flint glasses have V < 55 whereas the lower dispersion crown glasses have larger Abbe numbers. Values of V range from below 25 for very dense flint glasses, around 34 for polycarbonate plastics, up to 65 for common crown glasses, and 75 to 85 for some fluorite and phosphate crown glasses.
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* Abbe numbers are used in the design of achromatic lenses, as their reciprocal is proportional to dispersion (slope of refractive index versus wavelength) in the wavelength region where the human eye is most sensitive (see graph). For different wavelength regions, or for higher precision in characterizing a system's chromaticity (such as in the design of apochromats), the full dispersion relation (refractive index as a function of wavelength) is used.

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