Collimating ability limitation of meniscus lenses in collimating laser diodes;
凹凸透镜准直半导体激光器的极限
meniscus (shaped) lens
凹凸透镜，弯月形透镜
meniscus astrograph
弯月形透镜天体摄影仪
meniscus photoheliograph
弯月形透镜太阳摄影仪
a concave lens [mirror]
凹透镜 [凹面镜]
Shaped like a biconvex lens.
双凸透镜状的形状像双凸透镜的
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
Having greater curvature on the convex side than on the concave side.Used of a lens.
凸凹的凸面比凹面曲度更大的。用来指透镜
Having greater curvature on the concave side than on the convex side.Used of a lens.
凹凸的凹面曲率大于凸面曲率的。用于指透镜
aberration of the concave mirror is reduced by a meniscus lens.
用半月板镜头减少凹透镜的过失。
A planoconvex lens used to concentrate light.
凸透镜用来聚光的凸镜
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 New Method to Measure Optics Parameter of Plano-convex Lens and Plane-concave Lens
一种测定平凸、平凹透镜光学参量的新方法
The curvature of the film is concentric with the mirror behind the meniscus.
胶片的曲率是和弯月透镜后面的反射镜同心的。
A convex lens is used to concentrate rays of light.
凸透镜用于聚集光线。
large concave mirror produces image that is magnified by the eyepiece.
由目镜产生放大图像的大的凹透镜。
Some are flared-that is, thicker at the rim than in the center, like a concave lens.
有些呈喇叭形──即边缘较中心厚，类似凹透镜。
large convex lens produces image that is viewed through the eyepiece.
通过目镜观察物体图像的大的凸透镜。
On MRI, the lesion appeared double convex lens or egg in shape in coronal section and round or arrow head like in shape in sagittal section.
MRI冠状位像呈“双凸透镜”形、卵圆形 ,矢状位像呈卵圆形、“箭头样”表现 ;