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apochromat Syllabification: ap·o·chro·mat
Pronunciation: /ˌapəˈkrōmat/

Definition of apochromat in English:


A lens or lens system that reduces spherical and chromatic aberration.
Example sentences
  • There are now a few apochromats on the market that are comparable in price to similar, high-end achromats.
  • Higher order spherical aberration in apochromats is a result of strongly curved lens surfaces.
  • The biggest problem with early apochromats, other than their sizable cost and complexity, was light loss.


Pronunciation: /ˌapəkrōˈmadik/
Example sentences
  • In 1868 he invented the apochromatic lens system for the microscope.
  • The apochromatic lens, therefore, corrects for chromatic aberration to a greater degree than does an achromatic lens.
  • I hope the following history of the apochromatic lens designs made by Roland Christen of Astro-Physics is of some interest to the readers.


Early 20th century: from apo- + chromatic.

Definition of apochromat in:
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