diopter

n. 屈光度, 折光度 [计] 屈折度, 屈光度

发音

其它

词形变化

diopters 复数 diopters

别名

dioptra dioptre dioptry

释义与例句

n.
  1. 1.

    A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.

  2. 2.

    The dioptre adjustment mechanism of a pair of binoculars or of a camera viewfinder.

  3. 3.

    Any lens system, such as a telescope.

    废旧
  4. 4.

    A surgical speculum.

    废旧
  5. 5.

    An instrument for drawing the skull by projections.

    废旧
  6. 6.

    A theodolite or similar surveyor’s angle measuring device.

    废旧
  7. 7.

    An alidade.

    废旧
  8. 8.

    A lens element attached to the front of a photographic lens to shorten the lens's minimum focus distance; also called a "close-up filter".

    过时 艺术

词汇关系

名词

同义词 1

dioptre

上位词 2

unit unit of measurement

词源

From Latin dioptra, from Ancient Greek διόπτρα (dióptra).

来源：wiktionary