Abney effect

; green shifts towards cyan, and blue shifts towards violet. The RGB primaries on a typical display are not monochromatic, making the effect weaker than in the usual experimental setup. The Abney effect or the purity-on-hue effect is the perceived hue shift that occurs when white light is added to a monochromatic light source. The addition of white light will cause a desaturation of the monochromatic source, as perceived by the human observer. However, a less intuitive effect of the perceived white light addition is the change in the apparent hue. This hue shift is physiological rather than physical in nature. This variance of hue as a result of the addition of white light was first described by the English chemist and physicist Sir William de Wiveleslie Abney in 1909, although the date is commonly reported as 1910. A white light source can be created by the combination of red, blue, and green light. Abney demonstrated that the cause of the apparent change in hue was the red and green light that comprised this light source, and that the blue light component had no contribution to the Abney effect.

; green shifts towards cyan, and blue shifts towards violet. The RGB primaries on a typical display are not monochromatic, making the effect weaker than in the usual experimental setup.]] The Abney effect or the purity-on-hue effect is the perceived hue shift that occurs when white light is added to a monochromatic light source. The addition of white light will cause a desaturation of the monochromatic source, as perceived by the human observer. However, a less intuitive effect of the perceived white light addition is the change in the apparent hue. This hue shift is physiological rather than physical in nature. This variance of hue as a result of the addition of white light was first described by the English chemist and physicist Sir William de Wiveleslie Abney in 1909, although the date is commonly reported as 1910. A white light source can be created by the combination of red, blue, and green light. Abney demonstrated that the cause of the apparent change in hue was the red and green light that comprised this light source, and that the blue light component had no contribution to the Abney effect.

Miscellaneous facts

A patent for a color printer that claims to compensate for the Abney effect was published in 1995¹. The Abney effect must be taken into account when designing the cockpit for modern fighter planes. The colors viewed on the screen become desaturated when white light strikes the screen, so special considerations are made to counteract the Abney effect. A wide array of spectral colors exist that can be made to exactly match a pure color by adding various levels of white light.

References

Text derived from https://en.wikipedia.org/w/index.php?oldid=1363028044 under CC BY-SA 4.0; modifications have been made.