Definition of clear aperture

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PI Physik Instrumente - Microscope Stages LB ROS 11/24

Photonics Dictionary

clear aperture: The limited light-gathering area of an optical system. The area is normally restricted to an edge or outer surface of an individual component. Also known as free aperture or objective aperture. The clear aperture of a lens in most lens drawings refers to the full diameter of the lens, where the semi aperture (SA) refers to the radius of the lens.

Meadowlark Optics - Wave Plates 6/24 MR 2024

Lambda Research Optics, Inc. - Large Optics

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