Visible spectrophotometer LCRT-2005-S+850

NIRportable

Light transmission and spectral transmission Light transmission is the visually sensed light permeability of materials. NIR transmission is a physical measurand without actinic effect on the measurement values. Light transmission is particularly important when it comes to specification of window panes on all types of vehicles and buildings whose transmission is assessed with the photometric responsivity (V(λ)) of the human eye. In connection with thermal insulation screens, solar cell windows transmission in the NIR spectral range can also be of great importance. Transmission and light transmission measurement Transmission is a relative measurand. It describes the signal difference of the measured luminous intensity in a geometrically defined radiation beam. The measurements are done both without a test sample (100%) and with a test sample. LCRT-2005-S+850 light transmission measurement device The LCRT-2005-S+850 is elaborately designed for light transmission measurement of thin, scratched and clear samples. The D/O measurement geometry comprises of an integrating sphere light source and a luminance measurement device. The monitor detector of the light source and that of the receiver are equipped with a diode array. The spectral measurement data enables precise simulation of the standard light spectra and the photometric responsivity spectrum of the receiver. The sample is aligned in front of the light source for measurement. The transmittance can thus be determined through diffuse sample illumination also for thin diffuse scattering samples.