specular transmittance

specular transmittance

[′spek·yə·lər tranz′mit·əns]
(electromagnetism)
The ratio of the power carried by electromagnetic radiation which emerges from a body and is parallel to a beam entering the body, to the power carried by the beam entering the body.
References in periodicals archive ?
The specular transmittance spectra were recorded from 350 nm to 800 nm using the light from a 300 W xenon arc lamp chopped at 210 Hz, which passes through an Oriel Cornerstone 2601/4 monochromator and illuminates a calibrated photodiode with a transconductance amplifier that is connected to an Oriel Merlin digital lock-in amplifier.
The undisturbed radiation transmitted through the openings constitutes the beam-beam transmittance (specular transmittance), [[tau].sub.[bb].sup.m].
The recorded spectrum is specular transmittance without using integrating sphere.
In the visible light region, the ZnO:In thin films show specular transmittance above 75% irrespective of the solution spray rate.