adj 1 Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black 2 Refracting light without spectral color separation 3 Biology Difficult to stain with standard dyes Used in reference to cells or tissues 4 Music Having only the diatonic tones of the scale
Achromatic is a term which applies to refractor telescope optics An achromatic telescope uses two elements in its lens to minimize chromatic aberration Most inexpensive refractors are achromats
The quality of a transport line or optical system where particle momentum has no effect on its trajectory through the system An achromatic device or system is that in which the output beam displacement or divergence (or both) is independent of the input beam's momentum If a system of lenses is achromatic, all particles of the same momentum will have equal path lengths through the system
being of the achromatic color of maximum lightness; having little or no hue owing to reflection of almost all incident light; "as white as fresh snow"; "a bride's white dress"
Without hue; achromatic color--a color that does not elicit hue; achromatic point--point in a chromaticity diagram representing an achromatic stimulus (The Science of Color)
Light without color The quantity of light is the only attribute associated with achromatic light In physical terms this is the intensity or luminance or in the psychological sense it is the perceived intensity in which case the term brightness is used In the YIQ or YUV representations, this is the Y component In the HSV representations, it is the V (value) component In the HSL representations, it is the L (lightness or intensity) component
being of the achromatic color of maximum darkness; having little or no hue owing to absorption of almost all incident light; "black leather jackets"; "as black as coal"; "rich black soil"