Studien über Emission und diffuse Reflexion

Jentzsch, Felix

doi:10.1002/andp.19123441506

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The idea is to first "store" the energy emitted by the source per solid angle on the reflection surface in a grid. This corresponds to equation (1). Next, the energy per solid angle received by the receiver from the reflection surface is also "stored" in a grating.…”

Section: Simulationmentioning

confidence: 99%

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Diffuse Acoustic Reflection

Bartolomaeus

2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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The Huygens principle was extended to the Huygens-Fresnel Principle by Augustin Fresnel and can be derived directly form a scalar differential wave equation, known as Helmholtz equation. When calculating energy of the scalar field, a factor of obliquity must be added. The calculation of the sound power reflected by diffuse reflection from a rough surface is particularly simple when using the basic photometric equations for radiation and irradiation. A geometry of the experimental setup for both, simulation and measurement, are described. The simulations are using Rasmussen's transfer grid method. The idea is to first "store" the energy emitted by the source per solid angle on the reflection surface in a grid. Next, the energy per solid angle received by the receiver from the reflection surface is also "stored" in a grating. In the last step, the energy as a function of travel time is calculated by summing up. The roughness (texture wavelength and depth) of a surface leads to diffuse reflection. I.e. there is a redistribution of the power in the reflected beam, whereas with non-absorbing surfaces the energy is retained.

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Section: Simulationmentioning

confidence: 99%

“…Studie über Emission und diffuse Reflexion" ("Study on Emission and Diffuse Reflection" [1]). Lambert's law of emission can also be found *Corresponding author: bartolomaeus@bast.de.…”

Section: Introductionmentioning

confidence: 99%

Diffuse Acoustic Reflection

Bartolomaeus

2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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“…In general, both diffuse reflectance, the intensities of which obey Lambert's law, and specular components, the intensities of which do not obey this law, are usually present in DRCD measurements. 28 Similarly, DRCD is not only from diffuse reflections but also from regular reflections, and the relative magnitudes of their contributions to the total reflectance depend on the nature of the reflecting medium. It is therefore essential to prevent the contamination of regular reflections into diffuse reflections in the measurement of solid materials, particularly in those with a strong absorption.…”

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confidence: 99%

A New Method for Separating Configurational and Constitutional Chiralities Using Diffuse Reflectance Circular Dichroism (DRCD)

et al. 2013

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Solid-state chiral chemistry has attracted significant scientific interest because of its application in the chiral-selective production, chiral recognition, resolution, and detection of enantiomers of a chiral compound. Combining a novel diffuse reflectance circular dichroism (DRCD) technique with powder X-ray crystallographic analysis, we investigated the origin of chiral properties from the molecular and supramolecular chiralities and the possibility of separating independent CD signals from the superimposed CD signal resulting from different chiral origins.

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Die molekulare Rauhigkeit einer ebenen Quecksilberoberfläche

Gans

1924

Annalen der Physik

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23 1 3. D4e moTehwTare RauhllgMt drier e b m m QzcecJcdZberob@dlche; von R4okard Gram8.Schon Mandelstaml) hat daranf hingewiesen, da6 die ebene Oberflliche einer Fltissigkeit oder die Grenzflllche zweier sich nicht in allen Verhilltnissen mischenden Flnssigkeiten infolge der thermischen Agitation rauh sein und infolgedessen Licht diffus reflektieren mut3. Jedoch gelang es ihm nicht, das Problem vollstiindig zu behandeln.Das ist aber beim Quecksilber, wenn wir es als vollatiindig reflektierend auffassen kcmen$), leicht miiglich und sol1 im folgenden durchgefuhrt werden, wiihrend wir uns die Qrenzfliche zweier durchsichtigen Medien fir spatar vorbehalten.Es sei erwilhnt, daS nach einer beililufigen Bemerkung von J e n t z s c h g ein Quecksilberhorizont oder die Oberflische einer fltissigen Yetallegierung tatsiichlicb diffus reflektiert, so dat3 man die Stelle, wo ein Lichtbiindel auftrifft, recht deutlich sieht, auch dann, wenn sich das Auge weit aut3erhalb der lhfallsebene befindet. 1) L. Mandelstam, Ann. d. Phys. 41. S. 609. 1913. 2) Allerdings reflektiert Quecksilber tatsiichlich nur ungefshr 75 Proc. 3) F. Jentsech, Ann. d. Phys. 39. S. 997. 1912. der cinfallenden Strahlung.

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Studien über Emission und diffuse Reflexion

Cited by 5 publications

References 3 publications

Diffuse Acoustic Reflection

Diffuse Acoustic Reflection

A New Method for Separating Configurational and Constitutional Chiralities Using Diffuse Reflectance Circular Dichroism (DRCD)

Die molekulare Rauhigkeit einer ebenen Quecksilberoberfläche

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