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luminous efficiency |
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luminous efficiency [′lü·mə·nəs i′fish·ən·sē] (optics) Luminous efficiency Visual efficacy of visible radiation, a function of the spectral distribution of the source radiation in accordance with the “spectral luminous efficiency curve,’’ usually for the light-adapted eye or photopic vision, or in some instances for the dark-adapted eye or scotopic vision. The spectral luminous efficiency of radiant flux is the ratio of luminous efficacy for a given wavelength to the value of maximum luminous efficacy. It is a dimensionless ratio. See Luminous efficacy, Photometry How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Several hundred micro-downlighters, deep-drawn from aluminium reflector material, and an inner reflector ensure glare-free lighting with outstanding luminous efficiency achieving a light output ratio of up to 90 per cent and turning a long, narrow light source into wide and flat illumination. As a result, there is a growing interest in increasing their luminous efficiency through a better understanding of the processes that govem their operation. The device also exhibits a high luminous efficiency of 65 candela per ampere (cd/A) and an external quantum efficiency of 18%, at 1,000 cd/m2, both characteristic features and benefits of phosphorescent OLED technology. |
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