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Definition of: diopter

(dī·op′tər) noun Optics
The unit for measuring the refractive power of a lens, expressed as the reciprocal of its focal length in meters: a convergent lens of 1 meter focal length has a power of +1 diopter; a divergent lens, of −1 diopter. Also di·op′tre, di·op′try· [<MF dioptre <L dioptra <Gk., an optical instrument]

Most often used phrases:

diopter sight
diopter adjustment
split diopter
diopter sights
diopter lens
adjustable diopter
rear diopter
negative diopter
diopter aperture
positive diopter
built in diopter
split focus diopter
diopter rear sight

'diopter' used in domains:

dioptertech.com
dioptertechnologies.com
diopter.com
diopters.com
radiopter.com

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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