reflectance


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Related to reflectance: transmittance, radiance, Spectral reflectance, diffuse reflectance

re·flec·tance

(rē-flek'tăns),
A measure of reflected acoustic energy as a function of impedance, as in the middle ear.

re·flec·tance

(rĕ-flek'tăns)
A measure of reflected acoustic energy as a function of immitance, as in middle ear impedance.

reflectance

(rē-flek′tăns)
The fraction of total light reflected after it hits a surface, and the angle at which it is reflected. It is the inverse of absorbance.

diffuse reflectance

The reflectance of light from a rough or nonpolished surface in which the radiant energy tends to scatter. The angle of reflectance does not equal the angle of incidence.

spectral reflectance

The reflectance of light from a polished surface in which the angle of reflectance equals the angle of incidence.

reflectance 

A measure of reflection equal to the ratio of reflected luminous flux Ε′ to the incident luminous flux Ε, i.e. ρ = Ε′/Ε. Syn. reflection factor. See Fresnel's formula.
References in periodicals archive ?
The diffused reflectance of the thin film system was measured with a Lambda 750 UV/Vis/NIR spectrophotometer (Perkin-Elmer Corporation).
At the 560 nm visible wavelength, a significant reflectance difference was observed between any 2 samples, except for the surrounding non-nest soil and sand (p > 0.
As stated at the onset, the SOC 400T is designed to measure infrared reflectance of samples that are opaque to infrared radiation.
A study to find its diffuse reflectance has been made.
ANSI/IES RP-16 (IES 2010) defines the reflectance of a surface as "the ratio of the reflected flux to the incident flux," where flux may be either radiant flux (measured in watts) or luminous flux (measured in lumens).
However, to minimize any possible influence from using different applications, only spectral reflectance was acquired.
For the calculation of the value of reflectance of the substrate between dots, [R.
In the current study, spectral measurements of beam-beam transmittance, beam-diffuse transmittance and beam-diffuse reflectance were obtained at incidence angles, [theta], ranging from 0 to 60[degrees].
Reflectance data were summarized using principal components analysis (PCA).
Materials were also chosen to maximize the function of the buildings' outdoor areas as well as achieve the overall Solar Reflectance Index value which will lessen the overall heat island effect of each building.
With 96 to 98 percent reflectance, Labsphere's Spectralon(r) and Spectraflect(r) provide the highest level of uniform light integration for maximum efficiency in light collection tubes and light guides used in medical imaging equipment.
The medium and coarse resolution satellite systems, such as MODIS (Moderate Resolution Imaging Spectroradiometer), produce almost continuous data over the whole Earth and thus the information on reflectance seasonal changes at a coarse scale and in large territories is relatively well represented.