[7.2.2] The general mathematical function or matrix of data that describes the directional scattering of light by a surface or complex glazing system through both reflection and transmission across input […]
[22.214.171.124] VT or Tvis The fraction of incident light that is transmitted through a material. Also known as visible light transmittance (VLT).
[7.1.6] [See incomplete diffusion (partial diffusion).]
[126.96.36.199] The ratio of the flux leaving a surface or medium by specular reflection to the incident flux. Also called regular reflectance. NOTE: This term and its definition were changed […]
[7.3.1] That process by which incident flux is redirected at the specular angle (see bihemispherical reflectance). Also called regular reflection. NOTE: This term and its definition were changed in RP-16-17 […]
[7.8.2] The process by which the transverse vibrations of light waves are oriented in or parallel to the same plane. Polarization may be obtained by using either transmitting or reflecting […]
[7.6.2] The decrement in flux per unit distance in a given direction within a medium. It is defined by the relationship Φx = Φoe‑μx , where Φx is the flux […]
[7.7] The ratio of the luminance of a surface or medium under specified conditions of incidence, observation, and light source, to the luminance of a completely reflecting or transmitting, perfectly […]
[7.8] The process by which unpolarized radiation becomes polarized. It can be accomplished by reflection and/or transmission processes. (See polarized radiation.)
[7.8.1] Radiation whose electromagnetic field, which is transverse, is oriented in defined directions. The polarization can be rectilinear, elliptical, or circular.