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- The non diffracting beam is used as the measuring beam and a virtual detector is used to expand detector size. 该系统用无衍射光作测量光束,用虚拟探测器扩展探测器尺寸。
- Validity of the Fresnel approximation for hard-edged diffracted beams[J]. 引用该论文 王明灼;段开椋;吕百达.
- This may be a reference for the applications of AOTF's diffraction beams. 这对AOTF衍射光性能的应用具有参考价值。
- The high frame rate(HFR) ultrasonic imaging system developed with limited diffraction beams constructs images at a high frame rate. 基于有限衍射波束的高帧率超声成像系统能实现快速成像,但由于仅通过一次发射事件成像,信噪比较低,本研究针对该问题提出一种改进方案。
- The high frame rate (HFR) ultrasosnic imaging system, which is developed based on limited diffraction beams, transmits plane wave to construct an image. 基于有限衍射波理论的高帧率 (highframerate;HFR)超声成像系统是通过发射平面波成像的 .
- It diffracts the diffracted beam which effectively means that it generates an inverse transform. 它对衍射光束再发生衍射，这实际上意味着它产生了一个逆变换。
- The sample should not be so large as to increase unduly the width of the diffracted beam. 样品不应当过分大，以致不恰当地增加了衍射束的宽度。
- Either one is OK. I usually use dark field (diffracted beam). It will be strange if you use both. 用双束条件来确定位错的伯格斯矢量，在成像时用透射点成像，还是衍射点成像，或是用这两个点同时成像？谢谢
- This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
- The influences of grating depth and polarization angles of incident beams on diffraction efficiency and polarization of diffracted beams are calculated, and an optimized HOE for fabricating fcc structure photonic crystal is presented. 对HOE上的全息衍射光栅凹槽深度及其矢量方向与入射光偏振方向的夹角进行最优化设计,给出最佳制作方案并制作出符合fcc结构光子晶体要求的全息衍射光学元件; 对制作全息光子晶体模板的记录光路进行优化设计,其中包括对光束比(全息衍射光栅的衍射效率)、曝光量、显影时间等参数的优化设计。
- The beam centrally obscured is reshaped to annulus beam by a diffractive beam shaper and another phase corrector, as a result central obscuration is avoided. 为消除次镜遮挡,提高光通信终端的发射效率,提出一种基于衍射光学元件的新方法。
- Patience is a sine qua non for a good teacher. 做个优秀教师必不可少的条件是要有耐心。
- The diplomat was declared persona non grata. 这位外交家被宣布为不受欢迎的使节。
- non diffracting grating 无衍射光栅
- She performed on the balance beam with much grace. 她在平衡木上表演得非常优美。
- The rain has rotted the roof beams. 雨水使屋梁腐朽了。
- He is declared personal non grata and forced to leave the country. 他被宣布为不受欢迎的人而被迫离开该国。
- The beam of the searchlight pierced the darkness. 探照灯的光柱射入黑暗中。
- They riveted the steel beams together. 他们把钢梁铆接在一起。
- Those bamboo beams will not bear. 这几根竹制的横梁承受不住压力。
