spherical aberration

American  

noun

1. variation in focal length of a lens or mirror from center to edge, due to its spherical shape.

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spherical aberration British  

noun

1. physics a defect of optical systems that arises when light striking a mirror or lens near its edge is focused at different points on the axis to the light striking near the centre. The effect occurs when the mirror or lens has spherical surfaces See also aberration

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spherical aberration Scientific  

/ sfîr′ĭ-kəl /

1. See under aberration

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Etymology

Origin of spherical aberration

First recorded in 1865–70

Example Sentences

We moved the secondary mirror in and out of focus in order to sample the spherical aberration at different levels.

From Nature

In front of it, to bring the light to a focus without "spherical aberration," is a correcting plate so slightly curved that it looks like plain sheet glass.

From Time Magazine Archive

But when the first image came back, it was blurry owing to a flaw known as spherical aberration.

From Nature

The effect of thickness of lenses was shown by a diagram of the ingenious method of Mr. F. Wenham, who had long ago by this means corrected spherical aberration in microscopic objective.

From Scientific American Supplement, No. 415, December 15, 1883 by Various

This results in an increase in refractive-index as the center of the lens is approached and tends to diminish its spherical aberration.

From Visual Illusions Their Causes, Characteristics and Applications by Luckiesh, Matthew