Definition of achromatic point

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Photonics Dictionary

achromatic point: In color perception and vision an achromatic point refers to a color stimulus that appears neutral or without hue, often perceived as a shade of gray. It represents a point in color space where the color coordinates indicate no chromaticity, meaning there is no discernible hue.

In optics and lens design an achromatic point refers to the point where an achromatic lens focuses light from different wavelengths (colors) to a single point, minimizing chromatic aberration. it's the focal point where light of all colors converges without causing color fringes or distortion.

In both cases, the term achromatic point relates to the absence of chromaticity or the ability of optical systems to achieve color neutrality and correct for chromatic aberration.

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