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dioptre    
n. 屈光度

屈光度

dioptre
n 1: a unit of measurement of the refractive power of a lens
which is equal to the reciprocal of the focal length
measured in meters; used by oculists [synonym: {diopter},
{dioptre}]


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  • Dioptre - Wikipedia
    A dioptre (British spelling) or diopter (American spelling), symbol dpt or D, is a unit of measurement with dimension of reciprocal length, equivalent to one reciprocal metre, 1 dpt = 1 m−1
  • What Is A Diopter? - All About Vision
    What is a diopter? A diopter is an optical unit used to calculate the focusing strength of a pair of glasses or contact lenses And it is the measurement unit for a glasses or contact lens prescription If you know the power of a lens in diopters, taking the inverse will give you the focal length — the distance where light is focused What does a diopter mean? You may have wondered what the
  • Understanding Diopters: A Guide to Optical Measurement and . . . - eyeweb
    Dive into the world of diopters with our comprehensive guide! Learn about optical measurement, vision correction, and more Perfect for those seeking clarity on their vision needs
  • Diopters: The unit of measurement for the refractive power of the eye . . .
    Diopters explained simply: What are diopters? How are they measured for short-sightedness and long-sightedness? What do they mean for the correction of defective vision?
  • Dioptres – meaning and values - Hylo we care
    The dioptre owes its name to the French eye specialist Ferdinand Monoyer Since there was no unit for the "strength" of lenses in 1872, he simply invented the dioptre himself, and it is still used today to measure refractive error
  • Dioptra - Wikipedia
    A dioptra (sometimes also named dioptre or diopter, from Greek: διόπτρα) is a classical astronomical and surveying instrument, dating from the 3rd century BC The dioptra was a sighting tube or, alternatively, a rod with a sight at both ends, attached to a stand If fitted with protractors, it could be used to measure angles
  • Diopter | Magnification, Refraction, Aberration | Britannica
    Diopter, in optics, unit of magnifying power of a lens or lens system Because the power of a lens is proportional to unity (one) divided by the focal length (see lens), the power of a lens in diopters is numerically equal to 1 m divided by the focal length in metres The algebraic sign of the
  • DIOPTRE | English meaning - Cambridge Dictionary
    Medical examination (Definition of dioptre from the Cambridge Advanced Learner's Dictionary Thesaurus © Cambridge University Press)
  • Dioptre Explained
    The dioptre can also be used as a measurement of curvature equal to the reciprocal of the radius measured in metres For example, a circle with a radius of 1 2 metre has a curvature of 2 dioptres
  • Dioptre — Grokipedia
    A dioptre (British English; symbol: D or dpt) is a unit of measurement in optics that quantifies the power of a lens or curved mirror, defined as the reciprocal of the focal length in metres





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