Munsell value as explicit functions of CIE luminance factor

1992 ◽  
Vol 17 (3) ◽  
pp. 205-207 ◽  
Author(s):  
C. S. McCamy
Keyword(s):  
Luminance Factor

Gloss measurement of papers - the effect of luminance factor

1951 ◽  
Vol 2 (4) ◽  
pp. 92-97 ◽  
Author(s):  
V G W Harrison ◽  
S R C Poulter
Keyword(s):  
Luminance Factor

Measurement of Luminance Factor

1977 ◽  
Vol 2 (3) ◽  
pp. 121-123 ◽  
Author(s):  
S. B. Saunders ◽  
F. Grum
Keyword(s):  
Luminance Factor

Illuminance dependency ofL/Y (lightness/luminance-factor)-ratio effect

1993 ◽  
Vol 18 (3) ◽  
pp. 171-177 ◽  
Author(s):  
Yoshinobu Nayatani ◽  
Hiroaki Sobagaki ◽  
Kenjiro Hashimoto
Keyword(s):  
Ratio Effect ◽  
Factor Ratio ◽  
Luminance Factor

International comparison of measurements of luminance factor and reflectance of white diffusing samples: erratum

1976 ◽  
Vol 15 (3) ◽  
pp. 603 ◽  
Author(s):  
V. E. Kartachevskaya ◽  
H. Korte ◽  
A. R. Robertson
Keyword(s):  
International Comparison ◽  
Luminance Factor

scholarly journals Visual and non-visual properties of filters manipulating short-wavelength light

2019 ◽  
Author(s):  
Manuel Spitschan ◽  
Rafael Lazar ◽  
Christian Cajochen
Keyword(s):  
Short Wavelength ◽  
Optical Filter ◽  
Optical Filters ◽  
Optical Transmittance ◽  
Spectral Transmittance ◽  
Visual Effects ◽  
Short Wavelength Light ◽  
Luminance Factor ◽  
Visual Properties ◽  
Wavelength Light

AbstractOptical filters and tints manipulating short-wavelength light (so-called “blue-blocking” or “blue-attenuating”) are used as a remedy for a range of ocular, retinal, neurological and psychiatric disorders. In many cases, the only available quantification of the optical effects of a given optical filter is the spectral transmittance, which specifies the amount of light transmitted as a function of wavelength. Here, we propose a novel physiologically relevant and retinally referenced framework for quantifying the visual and non-visual effects of these filters, incorporating the attenuation of luminance (luminance factor), the attenuation of melanopsin activation (melanopsin factor), the shift in colour, and the reduction of the colour gamut (gamut factor). We examined a novel data base of optical transmittance filters (n=120) which were digitally extracted from a variety of sources and find a large diversity in the alteration of visual and non-visual properties. We suggest that future studies and examinations of the physiological effects of optical filters quantify the visual and non-visual effects of the filters beyond the spectral transmittance, which will eventually aid in developing a mechanistic understanding of how different filters affect physiology.

The luminance factor of smoked magnesium oxide at small angles of view

1962 ◽  
Vol 39 (7) ◽  
pp. 384-386 ◽  
Author(s):  
H F Meacock ◽  
F A Garforth ◽  
R G Shrubsall
Keyword(s):  
Magnesium Oxide ◽  
Luminance Factor

NUMERICAL-ANALYTICAL MODEL OF THE LUMINANCE FACTOR OF AN ARBITRARY SURFACE

2021 ◽  
Author(s):  
A.Y. Basov ◽  
G.V. Boos ◽  
V.P. Budak ◽  
A.V. Grimailo
Keyword(s):  
Asphalt Concrete ◽  
Single Scattering ◽  
Concrete Pavements ◽  
Bidirectional Reflectance ◽  
Parallel Layer ◽  
Measurement Results ◽  
The One ◽  
Luminance Factor ◽  
Bidirectional Reflectance Distribution

Road safety is determined by the distribution of luminance created by asphalt concrete surfaces. On the one hand, experimental determination of the bidirectional reflectance distribution function is laborious, on the other hand, for some angles this task is difficult. The authors propose to use both analytical and statistical models of the luminance factor, which allow determining the luminance factors or coefficients for arbitrary angles of incidence and sighting. The models are based on the idea of a plane-parallel layer, in the volume of which radiation scattering occurs. With correctly selected optical properties of the layer (the optical thickness of the medium, the albedo of single scattering, the phase function of the particles included in the composition), the models allow obtaining reliable results, which was confirmed when compared with the measurement results. The models can also be applicable not only for asphalt concrete pavements, but also for any other surfaces.

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