apochromatism
|a-po-chro-ma-tism|
/ˌeɪpəkrəˈmætɪzəm/
correction of color fringing
Etymology
'apochromatism' originates from Greek elements via modern scientific coinage: 'apo-' (Greek ἀπό) meaning 'away from' and 'chroma' (Greek χρῶμα) meaning 'color', combined with the English nominal suffix '-ism'.
'apochromatism' developed from the adjective 'apochromatic' and the noun 'apochromat' used in 19th-century optics; the noun form with '-ism' emerged later to denote the quality or condition of being apochromatic.
Initially formed to denote being 'away from color' (i.e. free from color errors), it evolved to the technical sense 'the quality of correcting color fringing (chromatic aberration)' in optical contexts.
Meanings by Part of Speech
Noun 1
the property of an optical system by which three selected wavelengths (typically red, green and blue) are brought to the same focus; a strong correction of chromatic aberration.
The telescope's apochromatism produced sharp, color-free images of the stars.
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Noun 2
an optical element (such as a lens) that exhibits apochromatism; an apochromatic lens or system.
The photographer invested in an apochromatism to eliminate color fringing in macro shots.
Synonyms
Last updated: 2025/09/19 04:50