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spherical aberration

   Also found in: Dictionary/thesaurus, Legal, Encyclopedia, Wikipedia 0.01 sec.
spherical aberration
n.
A blurred image that occurs when light from the margin of a lens or mirror with a spherical surface comes to a shorter focus than light from the central portion. Also called dioptric aberration.
aberration [ab″er-a´shun]
1. deviation from the normal or usual.
2. imperfect refraction or focalization of a lens.
chromatic aberration unequal refraction by a lens of light rays of different lengths passing through it, producing a blurred image and a display of colors.
dioptric aberration (spherical aberration) inability of a spherical lens to bring all rays of light to a single focus.
ventricular aberration aberrant ventricular conduction.
aberration
1. deviation from the normal or usual.
2. imperfect refraction or focalization of a lens, e.g. the lens of the eye.
chromatic aberration
inability to focus a pencil of light through a lens because of the different refrangibilities of the colored constituents of white light. In an optical instrument such as a microscope this represents an error in the lens system.
spherical aberration
that due to failure of a spherical mirror to focus all the light rays at one point; a fault of construction in an optical instrument.
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