1.
flat-top plastic bifocal
平顶塑料双焦点透镜
2.
Propagation Properties of Partially Coherent Flat-topped Beam Passing through Astigmatic Lens;
部分相干平顶光束经过双焦距薄透镜的传输特性研究
3.
A usually transparent glass or plastic dome.
透明玻璃（塑料）圆顶
4.
Having the same focus or foci. Used of a lens.
共焦的有共同焦点的。用于透镜
5.
He focuses the lens of a microscope.
他调整显微镜的透镜以定焦点。
6.
The act or result of causing a lens to deviate from accurate focus.
散焦，去焦使透镜偏离准确的焦点的行为或结果
7.
The pit cover should be sealed over with tar paper or plastic.
顶盖必须用焦油纸或塑料封闭。
8.
"A convex lens causes rays to converge on a single point, the focal point."
会聚透镜使光线会聚于一点,即焦点。
9.
"Diverging lens causes the rays of a parallel beam of light to spread out and appear to come form a point, i.e. the rays diverge. It produces a virtual image at its principal focus. Such a lens is thinner at the center than at the edge"
散光镜使一束平行光线散开而形似出发于一点,在其主焦点上产生虚像, 这种透镜的心比边缘薄
10.
Analysis and Measurement of Spot Focusing Lens Antenna Resolution
点聚焦透镜天线分辨率的分析与测量
11.
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
12.
He focused his binoculars on the bird.
他把双筒远镜的焦点对准在那只鸟上。
13.
air-spaced doublet
双不胶透镜; 双分离透镜; 双分透镜; 空气隙双合透镜; 分离式双透镜
14.
manual zoom lens
(镜头)手控可变焦距透镜
15.
PLANO-CONVEX SELFOC LENSES FOR COUPLING LASER DIODE TO FIBER
耦合半导体光源和光纤的平凸自聚焦透镜
16.
He focused the sun's ray on a piece of paper with a burning-glass.
他用一面凸透镜把阳光在纸上聚成焦点。
17.
Optical Parameters Of Selfoc Lens Measured by Modified Spot Way
改进的斑点法测量自聚焦透镜光学参数
18.
Research on Open Circuit Voltage of Solar Cell Under the Modulation of Lens Focus Position
透镜焦点位置调制太阳电池开路电压的研究