单词concave lens
na.: 凹透镜
网络: 凹球镜片；近视镜片；凹透镜片
近视镜片
凹面镜
凹透镜
The invention provides a method with a concave lens focus as a welding heat source and a welding device thereof.
本发明提供一种以凸透镜焦点为焊接热源的方法及其焊接装置。
Just AS a double convex lens enlarges, so a double concave lens reduces.
正象双凸透镜可以放大那样，双凹透镜也可以缩小。
A concave lens causes rays to diverge as though they are coming from a focal point.
发散透镜使光线分开，就好象从焦点上发出来的那样。
Measuring the focal length of concave lens using collimator
利用准直管法测凹透镜的焦距
A Method for Measuring the Focal Length of Thin Concave Lens
一种测量薄凹透镜焦距的新方法
Simple Method of Measuring the Refractive Index and Radius of Curvature of Thin Convex-concave Lens
测定薄凸凹透镜折射率和曲率半径的简单方法
Effects of concave lens on eyes of guinea pig
凹透镜对豚鼠眼生长及屈光发展的影响