illumination path

The optical path through which illumination light passes through. It typically consists of a light source, collector lens, field stop, aperture stop, and condenser lens.

Synonyms: illumination optical path

See also: Köhler illumination, conjugate planes, optical train, illumination, field stop, aperture stop, condenser, collector lens

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The Microscope Optical Train

The optical train consists of an illuminator, condenser, specimen, objective, and detector.