Definition of Dioptre. Meaning of Dioptre. Synonyms of Dioptre

Here you will find one or more explanations in English for the word Dioptre. Also in the bottom left of the page several parts of wikipedia pages related to the word Dioptre and, of course, Dioptre synonyms and on the right images related to the word Dioptre.

Definition of Dioptre

Dioptre
Dioptre Di*op"tre, n. [F. See 2d Dioptric.] (Optics) A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.

Meaning of Dioptre from wikipedia

- A dioptre (British spelling) or diopter (American spelling), symbol dpt, is a unit of measurement with dimension of reciprocal length, equivalent to one...
- 2.0-dioptre lens placed close to a thin 0.5-dioptre lens yields almost the same focal length as a single 2.5-dioptre lens. Depth of field Dioptre f-number...
- The Four Prism Dioptre Reflex Test (also known as the 4 PRT, or 4 Prism Dioptre Base-out Test) is an objective, non-dissociative test used to prove the...
- for a constant head tilt or turn. Prism correction is measured in prism dioptres. A prescription that specifies prism correction will also specify the "base"...
- eye. This dramatic change in focal power of the eye of approximately 15 dioptres (the reciprocal of focal length in metres) occurs as a consequence of a...
- optical power is the inverse metre (m−1), which is commonly called the dioptre (symbol: dpt). Converging lenses have positive optical power, while diverging...
- A dioptra (sometimes also named dioptre or diopter, from Gr****: διόπτρα) is a classical astronomical and surveying instrument, dating from the 3rd century...
- reciprocal centimetre or inverse centimetre (symbol: cm−1). In optics, the dioptre is a unit equivalent to reciprocal metre. Quantities measured in reciprocal...
- level viewfinder with a magnifier loupe (interchangeable with different dioptre adjusts) AE prism, prism and chimney viewfinders Vertical split image,...
- well-adapted for sensing green light. Although their accommodation of 11 dioptre is comparable to that of humans and they see well in twilight because of...