Collection by an aperture

ECE532 Biomedical Optics
Steven L. Jacques, Scott A. Prahl
Oregon Graduate Institute

An aperture is essentially a hole through which light can pass to reach some detection system.

An aperture to collect a limited solid angle of light.

Consider an aperture with a detector placed behind the aperture. Only the light which enters the aperture but hits the detector will be detected. Hence the aperture has a limiting cone of acceptance.

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