Search results
Results from the WOW.Com Content Network
The spectral hemispherical reflectance in frequency and spectral hemispherical reflectance in wavelength of a surface, denoted R ν and R λ respectively, are defined as [1] =,,, =,,, where Φ e, ν r is the spectral radiant flux in frequency reflected by that surface;
Diffuse reflectance spectroscopy, or diffuse reflection spectroscopy, is a subset of absorption spectroscopy.It is sometimes called remission spectroscopy.Remission is the reflection or back-scattering of light by a material, while transmission is the passage of light through a material.
In spectroradiometry, spectral features can be recognized and quantified by making use of the spectra containing different parameters measured by spectroradiometers. [2] The most widely used spectral parameter in spectroradiometry for applications in geosciences is reflectance.
The transmittance or reflectance value for each wavelength of the test sample is then compared with the transmission or reflectance values from the reference sample. Most instruments will apply a logarithmic function to the linear transmittance ratio to calculate the 'absorbency' of the sample, a value which is proportional to the ...
Spectral signature is the variation of reflectance or emittance of a material with respect to wavelengths (i.e., reflectance/emittance as a function of wavelength). [1] The spectral signature of stars indicates the composition of the stellar atmosphere .
Coplanar condition of specular reflection, in which = Reflections on still water are an example of specular reflection.. Specular reflection, or regular reflection, is the mirror-like reflection of waves, such as light, from a surface.
Diffuse reflectance spectroscopy can be used to determine the absorption spectra of powdered samples in cases where transmission spectroscopy is not feasible. This applies to UV-Vis-NIR spectroscopy or mid-infrared spectroscopy .
Spectral resolution, that define the smallest spectral variation that the system is able of distinguish; Radiometric accuracy, that says how accurate is the system in measuring the spectral reflectance percentage; The most used way to achieve spectral imaging is to take an image for each desired band, using a narrowband filters.