spectral luminous efficiency


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spectral luminous efficiency

n
(General Physics) a measure of the efficiency of radiation of a given wavelength in producing a visual sensation. It is equal to the ratio of the radiant flux at a standard wavelength to that at the given wavelength when the standard wavelength is chosen so that the maximum value of this ratio is unity. Symbol: V(λ) (for photopic vision) or V′(λ) (for scotopic vision)
References in periodicals archive ?
In 1924 the CIE introduced the spectral luminous efficiency function V([lambda]) for photopic vision [CIE 1926], which is based on the responsivity of the cones.
Combining the signals from the three types of cones creates what is called The Spectral Luminous Efficiency distribution of a 'standard eye'.
An erroneous result is also achieved by photometric measurement of the ideal lamp, represented by the normalized bell curve in Figure 2a, which shows the lamp's degree of brightness based on the response curve (or the normalized photopic spectral luminous efficiency curve) of a standard human retina.

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