photopic


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Related to photopic: scotopic, Mesopic

pho·top·ic

(fō-top'ik),
Pertaining to photopic vision.

pho·top·ic

(fō-top'ik)
Pertaining to photopic vision.
References in periodicals archive ?
For the same photopic illuminance level (57 lux), the parking lot illuminated by the 6500K source will be perceived (on a linear scale) 85 percent brighter, and safer, but the power density will be 20 percent greater.
Five past studies of 12 presenting empirical evidence for lamp spectrum and spatial brightness at photopic levels meet these criteria [Berman and others, 1990; Vrabel and others, 1998; Houser and others, 2004; Houser and others, 2009; Royer and Houser 2012].
For the trained group, there was no significant change in the number of contacts with obstacles between W1 and W2 under photopic conditions, but there was a significant reduction in the number of such contacts under mesopic conditions (2.
Scotopic to Photopic or Cirtopic to Photopic ratio theory, prime color theory, correlated color temperature, photometry, color quality metrics, linear brightness models, and color appearance models all failed to predict or correctly order the difference in the participants' perception of brightness.
The spectral mismatch correction technique commonly used in photometry can be applied to UV broadband measurements where the photopic V([lambda]) function is replaced by a particular UV action spectrum.
Debbie Ha, "Human Eye Response to LED Light: Scotopic versus Photopic Light and Vision," LED Roadway Lighting Ltd.
11) The recommended fail criterion for a lantern test is two errors on two runs (sequences) of nine colour pairs in photopic viewing but this can only be applied to the H-W lanterns and the FALANT.
Via software controls, three slides were created of approximately equal photopic luminance (that is, 0.
Based in part upon work by Gibson and Tyndall at NBS in 1923, the International Commission on Illumination (CIE) defined an average spectral response for the human eye for well-illuminated conditions, which is termed the spectral luminous efficiency for photopic vision.
Our investigators showed that visual outcomes using Synchrony are very good, and that the lens provides a complete and functional range of vision at all distances without compromising contrast sensitivity or induced photopic phenomena (i.
Nevertheless, our collective obsession with photopic lumens per watt or per sq ft (illuminance) has functionally limited manufacturers from developing new lighting systems.
Monochromats cannot distinguish wavelength differences in photopic illumination and are able to match all the spectral hues using a single variable.