Based on these values, we also calculated the corresponding values of the luminous efficiency function (or luminosity), for use when calculating the constant-luminosity response curves in several figures.
The exact nature of this correlation between saturation and brightness for equiluminant lights will depend on the specific SPD and on the observer's luminous efficiency function.
Recalling that the luminous efficiency function peaks near the centre of the visible spectrum [2], this decreasing saturation can only lead to an increase in luminosity.
33 Briefly, illuminance is irradiance weighted by the photopic luminous efficiency function, V, an orthodox measure of the spectral sensitivity of the human fovea, peaking at 555 nm.
Spectral sensitivity (luminous efficiency function) is given by the minimal intensity of monochromatic light of given wavelength that can be detected.
where T av is the average optical transmittance in the visible range (380 780 nm), V is the luminous spectral efficiency function defining the standard observer for photometry [26], and T is the measured transmittance of BAB multilayer thin films.
In this paper, we present a study of management of power in function of luminous efficacy of white LED as well as the efficiency enhancement of the direct-view backlight with photon recycling.
The manufacturer provided a number of measures of luminous intensity as a function of voltage.
It was shown that the optical density defined for the reflected luminous intensity was a linear function of the NAPL and the water saturation for each spectral band and for any two and three-fluid phase systems.
This relations corresponds to conservation of luminous flux for the second transfer function.
