CIE spectral luminous efficiency for photopic vision | CIE
Values of spectral luminous efficiency for photopic vision, V (lambda), lambda in standard air, 1 nm wavelength steps, original source: CIE 018:2019, Table 1
Luminous efficiency function - Wikipedia
A luminous efficiency function or luminosity function represents the average spectral sensitivity of human visual perception of light. It is based on subjective judgements of which of a pair of different-colored …
Luminous Efficacy - HyperPhysics
The response of the eye as a function of frequency is called the luminous efficacy of the eye. It has been tabulated for both the light-adapted (photopic) case and the dark-adapted (scotopic) case. Source: …
Luminosity functions - CVRL
Luminous efficiency functions. The CIE physiologically-relevant functions are provided as ascii csv (comma separated values) files, ascii xml (extensible markup language) files, html tables, which …
Luminosity Functions – scotopic and photopic vision, spectral ...
The article explains the crucial distinction between the photopic luminosity function for bright conditions (daylight vision), which peaks at 555 nm, and the scotopic luminosity function for low light levels …
Spectral Sensitivity of the Human Eye Gigahertz-Optik
Only in very rare cases is the spectral sensitivity of the human eye under dark adapted conditions (scotopic vision), defined by the spectral luminous efficiency function V' (λ), technically relevant. By …
The Role of the V (λ) Curve in Photometric Measurements ...
May 18, 2026 · To match its response to human vision, it uses a V (λ) filter that tweaks the detector’s sensitivity. This filter tries to follow the CIE’s standard photopic response curve.