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concave lens
凹透镜
常用释义
词性释义
凹透镜：一种透镜，中央较薄，边缘较厚，能够使光线发生向外发散的作用。
例句
全部
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
1·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。
2·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。