focal power


Also found in: Medical.

focal power

[′fō·kəl ‚pau̇·ər]
(optics)
A measure of the ability of a lens, mirror, prism, or optical system to converge a parallel beam of light; equals the reciprocal of the focal length. Also known as power.
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Each chapter approaches the very broad theme of "innovation dynamics" with lenses of varying focal power.
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He smiled and told me it had now been scientifically proven that a carefully crafted photographic image can truly outperform our own fairly advanced focal powers.
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The experimental lenses use different focal powers within a single lens: either alternating focal powers across the lens, or confined to the outer edge.
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