| 释义 |
屈光度qūguāngdù透镜的折光强度单位,数值上等于焦距(以米表示)除1。如透镜的焦距为2米,它的屈光度就是1/2。{dioptre; unit of measurement of the refractive power of a lens, equal to 1 divided by its focal distance (in metres), e.g. if the focal distance of a lens is 2 metres, its dioptre will be 1/2} |