Ratio of the intensity of reflected radiation to that of the incident radiation on a surface.
The fraction of light that is reflected toward the eye by an object.
Reflectance is the ratio of power reflected to the incident power at a connector junction or other component or device, usually measured in decibels or dB. Reflectance is stated as a negative value, e.g., -30 dB. A connector that has a better reflectance performance would be a -40 dB connector or a value less than -30 dB. The terms return loss, back reflection, and reflectivity are also used synonymously in the industry to describe device reflections, but stated as positive values.
Reflectance is the ratio of the total radiant flux, as of light, reflected by a surface to the total striking the surface.
Amount of light reflected back from a surface. Reflectance is measured under specified conditions in which a surface coated with barium sulfate is considered to be a perfect diffuse reflector of light.
A bar code verification term. The ratio of the amount of light which is reflected back from the white spaces of a bar code during scanning to the amount of light reflected under similar illumination conditions.
the amount of light reflected by paper
The percentage of light that is reflected from an object. Spectrophotometers measure an object's reflectance at various intervals along the visible spectrum to determine the object color's spectral curve. See Spectral Curve, Spectral Data.
Reflectance is the fraction of radiant energy that is reflected from a surface.
The proportion of light aimed at an object that is reflected by it. An object's reflectance determines whether the object is perceived as light or dark.
ratio of the radiant flux reflected from a surface to the incident radiation (a.k.a. reflection factor) [--] Reflexions- grad
an operation mode of fiber optic chemical sensors. In this mode the detector measures the changes in spectral properties of the light beam reflected (after interaction) from the optomembrane (chemooptical interface).
The ratio of reflected flux to incident flux.
ratio of the radiant energy reflected by a body to the energy incident on it (approximately the inverse of emissivity)
The ratio of light reflected from a surface to that incident upon it.
The amount of total infrared radiation reflected by a surface. This value is frequently the inverse of the Absorption (Emissivity).
Degree of light reflectance.
This is a measure of the amount of light reflected from an illuminated surface. The typical light source is 670 nm. Linerboard reflectance is an important factor in printed bar code verification. Reflectance is related to, but different from, brightness.
The ratio of the energy incident on a body, and the energy reflected off it.
The ratio of the radiant flux reflected by an object to that incident upon it.
The ability of a surface or printed area to reflect light.
Refers to how much the ink and background paper reflect the light within the scanner. Affects the quality of image.
Reflectance refers to the fraction of incoming radiant energy that is reflected from the surface.
The amount of light returned from an illuminated surface.
the light intensity emitted from a surface in a given direction.
(of a surface) The proportion of incident light the surface reflects. (See spectral reflectance).
The ratio of the amount of light of a specified wavelength or series of wavelengths reflected from a test surface to the amount of light reflected from a barium oxide or magnesium oxide standard under similar illumination conditions.
The ratio of the light reflected by a surface to the light incident upon it.
The ratio of the light that radiates onto a surface to the amount that is reflected back.
Proportion of incident light that is returned from a reflective surface.
The percentage of light reflected back from a surface, the difference having been absorbed or transmitted by the surface. See Reflection.
The fraction of the incident light that is reflected.
The measured level of light reflected by a paper or imprinted characters thereon, expressed in percent of a standard reference material.
The ratio of light reflected from a surface to that which initially strikes it. Except for matt surfaces, reflectance depends upon how the surface is illuminated, the direction of the incident light, and the spectral distribution of the incident light. See also Footcandle.
The ratio of the radiant energy reflected by a body to that incident upon it.
The light which is reflected back from the white spaces of a bar code during scanning. Resolution See Density.
The ratio of light reflected from a surface to the light incident on the surface. Reflectance's are often used for lighting calculations. The reflectance of a dark carpet is around 20 percent, and a clean white wall is roughly 50 to 60 percent.
The ratio of the intensity of reflected light to that of incidental light.
Ratio of the radiant energy reflected by an object or surface to the energy incident upon it.
The ratio of reflected radiant energy to incident radiant energy.
The return of radiant energy by a surface.
In radiation transfer, the fraction of incoming radiation that is reflected from a medium. The sum of this, the transmittance, and the absorbance must equal unity.
The fraction of incident radiation reflected by a material.
Reflectance is the fraction of the total radiant flux incident upon a surface that is reflected and that varies according to the wavelength distribution of the incident radiation.
A measure of the amount of light that strikes a surface that is reflected. Light-colored smooth surfaces have a high reflectance.
Reflectance is a measure of the light reflected from the cleaved or polished fiber end at the glass/air interface. Reflectance is expressed in dB relative to the incident signal. Reflectance is important in optical systems because some active optical components are sensitive to light reflected into them. Reflected light is also a source of loss. Also known as “backreflection,” and “optical return loss.” See also: insertion loss, attenuation
Sometimes called reflectance factor. The ratio of reflected light to incident light (light falling on a surface). Reflectance is generally expressed in percent
The amount of light in percentage reflected by a given surface. (The rest of the light is either absorbed by the material, or transmitted through it).
The ratio of reflected power to incident power. Note: In optics, frequently expressed as optical density or as a percent; in communication applications, generally expressed in dB.
The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.
The fraction of the light incident on a surface that is reflected and varies according to the wavelength distribution of the light.
The ratio of the light reflected from a surface to that falling on the surface, expressed as a percentage.