| diopter |
A unit of focusing power of a lens. A two diopter lens is twice as strong as a one diopter lens. While a 1 diopter lens will focus light at one meter (39.3inches) a two diopter lens will focus light at half a meter (19.7 inches). This is because the two diopter lens will bend or focus a beam of light more than a one diopter lens.
출처: www.eyedocs.com/glossary.htm
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| diopter |
Measurement of optical acuity
출처: www.keratoconus-group.org.uk/glossary.html
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| diopter |
The unit of measure used to define eye correction or the refractive power of a lens. In most cases, an optical eyepiece will accommodate for differences in individual eyesight among users.
출처: www.cobra-optics.co.uk/glossary.htm
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| diopter |
A term used in the optical in the optical industry to measure the magnifying power of a lens. The laps used to generate spherical surfaces on lenses are marked in diopters. The diopter rating of a lens is the reciprocal of its focal length which, for a planoconvex lens, is given by D=1/f=(n-1)/R. R is the radius of curvature and n is the index of refraction of a material. If n = 1.5 , which is typical for glass, then D=1/2R, where R is measured in meters.
출처: www.tedlind.net/glossary.htm
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