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- This paper analyzes extended hemispherical lens,which can be used in focal imaging. 文中分析可用于焦面阵成像的扩展半球介质透镜。
- The results show that the field of view (FOV) of hemispherical lens and CPC are wider and its gain is higher compared with other optical antennas. 分析表明：半球透镜和CPC视场较大，增益值高。
- Some conventional optical antennas like hemispherical lens, compound parabolic concentrator (CPC), Cassegrain telescope were analyzed with the software of ZEMAX. 针对非视线大气光通信的需求，利用ZEMAX软件对半球透镜、复合抛物面聚光器（CPC）和卡塞格伦望远镜等光学天线进行了性能分析。
- This lens can magnify 20 diameter. 这个透镜能放大20倍。
- Some adjustment of the lens may be necessary. 可能有必要调节一下镜头。
- Do you have soft contact lens care product? 有没有软性隐型眼镜保养用品？
- He uses lens to make things appear clearer. 他用镜片以便看东西更清楚些。
- The lens is often used to make telescopes. 镜片常被用来做成望远镜。
- Don't smear the lens; I've just polished it. 别把镜头弄脏了，我刚刚擦过。
- hemispherical lens 半球形透镜
- The camera lens must be screened from direct sunlight. 照相机的镜头不可受到阳光的直射。
- The end of the hole is hemispherical. 小孔端面成半球状。
- A close- up lens is ideal for taking close- up picture. 近摄镜用来拍特写照片最理想。
- In this operation the surgeons implant a new lens (in the eye). 医生在这次手术中给病人(眼球)植入了新的水晶体。
- Calyx tube shallow, patelliform to hemispherical. 萼筒浅，对半球形小盘状。
- The gunsight has an infrared lens for night vision. 射击瞄准器装有用于夜间视力的红外线镜头。
- 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。
- The lens hood is used to cover up the lens. 遮光罩是用来遮盖镜头的。
- The lens of the eye accommodate to distance. 眼球晶状体能根据距离进行调节。
- I prefer a built-in zoom lens, like the one I have. 我喜欢如我所有的那种固定式变焦镜头。
