reflectance


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re·flec·tance

(rē-flek'tăns),
A measure of reflected acoustic energy as a function of impedance, as in the middle ear.
Farlex Partner Medical Dictionary © Farlex 2012

re·flec·tance

(rĕ-flek'tăns)
A measure of reflected acoustic energy as a function of immitance, as in middle ear impedance.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Medical Dictionary, © 2009 Farlex and Partners

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.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Reflectance confocal microscopy as a second-level examination in skin oncology improves diagnostic accuracy and saves unnecessary excisions: a longitudinal prospective study.
Here we demonstrate for the first time that stomatopod weapon performance correlates with the total reflectance of stomatopods' meral spots.
Iron oxide's spectral profile displays a strong light reflectance in the teal to red region (550-700 nm).
With the distance of 15 cm to the sample, the recorded spectrum was an average spectral reflectance of the surface area of 35 [cm.sup.2], which equals a circle of 6.5 cm in diameter.
In the current study, we determined associations between VA and retinal layer thickness and reflectance in DR subjects with and without DME.
The mean reflectance curves for all treatments during the 2013 and 2014 harvests exhibited a typical pattern described by JENSEN (2009) as the "spectral signature of vegetation" and reflected structural changes that took place in the canopy during the growth and development cycle (Figure 1C and 1D).
In order to correlate the crystal orientation and reflectance of Ag crystals, the influence of their surface morphology (or roughness) on the reflectance must be eliminated.
According to the morphological and reflectance results, we can safely conclude that the optimal pyramid coverage of the wafer surface, optimum pyramid size (~1.3 [micro]m), and total reflectivity (11.22%) are achieved around 4% IPA concentrations, and this result is in good agreement with the literatures [22].
Snow-free land is distinguished from snow cover simply because it has low reflectance in the visible region of the electromagnetic spectrum, unlike snow cover.
The reflectance measurements of the subject's forearm were acquired using a commercially available ultraviolet/visible/near-infrared spectrophotometer.
Solar reflectance values are typically >80% for coatings formulated specifically as "cool" roof paints, which means they absorb and/or transfer <20% of the incident energy.