| 释义 |
凹透镜āotòujìng透镜的一种,中央比四周薄,平行光线透过后向四外散射。近视眼镜的镜片就属于这个类型。{concave lens, with its centre thinner than its edge, diverging in all directions the parallel rays that have penetrated its surface. The lenses of spectacles worn by a nearsighted person are of this type.}也叫also发散透镜{fāsàn tòujìng}。 |