1. Optical powerOptical power (also referred to as dioptric power, refractive power, focusing power, or convergence power) is the degree to which a lens, mirror, or other optical system converges or diverges light. It is equal to the reciprocal of the focal length of the device. The dioptre is the most common unit of measurement of optical power. The SI unit for optical power is the inverse metre (m).
Read “Optical power” on English Wikipedia
Read “屈折力” on Japanese Wikipedia
Read “Optical power” on DBpedia
Read “Optical power” on English Wikipedia
Read “屈折力” on Japanese Wikipedia
Read “Optical power” on DBpedia
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