查询词典 aperture

It has some prominent merits compared with ordinary prismatic elements: AOTF is small and light, its structure is solid without moving parts, both the clear aperture and the incident angular aperture are big, high diffraction efficiency, it can be tuned neatly and fast in the wide field.

同时具备空间分辨能力和光谱分辨能力的光谱成像技术是图像分析技术与光谱分析技术的完美结合。

A fan-shaped aperture mask was designed, the aperture mask cooperate with a 3-axies worktable, makes up the micro-drilling system.

设计了扇形掩模，依据三轴联动加工台，设计了掩模钻孔加工系统，在此基础上研究了掩模旋转钻孔的加工参数。

Finally, a two-mask process was attempted to extend the same concept of the chip process. Here the mask of the contact aperture was replaced by the mask of the LED pad. After etching the SiO2 and ITO in the aperture region, a lateral etch of SiO2 was made to increase the ITO contact area. Although the forward voltage of the GaN LED shows a normal value, the process yield is still low and requires further study.

二道光罩制程延伸了三道光制程的理念，只是因为透明导电层的圆孔图形，是用电极的光罩去开的，所以蚀刻完二氧化矽膜及氧化铟锡膜后，必须再做二氧化矽膜的回蚀刻，让二氧化矽再内缩进去，以增加氧化铟锡和电极的接触面积，不会造成发光二极体的顺向电压提高，但因制程良率太低，所以还须要继续研究改善。

It was found that for large aperture ratios (the ratio of focal length of the primary to its aperture, as the f-ratio in modern cameras for instance), f/10 or more, the difference between spherical and paraboloidal mirrors was negligible in the performance of the telescope.

结果发现，大口径的比例（比例焦距初级到其孔径，由于架F -比率在现代相机举例来说）， f/10或更长时间，之间的差别球面和抛物面反射镜是微不足道的，在表现望远镜。

The result indicates that with the decreasing of perforated plate aperture、aperture ratio and weir height and increasing of bare tower velocity, the leakage is hardly to appear.

实验结果表明，多孔板的孔径、开孔率越小，堰高越低，空塔速度越大，越不易出现漏液。

A group of standard reticules are fabricated by binary optics to scale defects. The resolution of the optical system of defects-microscopic scattering imaging is better than sub-micrometer and the view field of a sub-aperture is about 3 mm. An image array of 5×5 sub-aperture is obtained by two-dimensional scanning system.

最终利用该变倍光学显微镜散射成像系统得到能分辨微米量级表面疵病的图像，其单个子孔径物方视场约为3 mm，对X，Y两方向进行5×5子孔径图像扫描成像，并给出了与标准比对的定量数据结果。

The light intensity distribution was characterized by Fraunhofer diffraction when the projection of light source located in the symmetry center of rectangular aperture and the size of aperture is small enough .

根据菲涅尔-基尔霍夫衍射积分得出矩孔菲涅尔衍射的光强分布表达式，对该表达式作了数值计算，分析了矩孔尺寸对衍射光强分布的重要影响。

Synthetic aperture radar ; curvilinear synthetic aperture radar ; motion compensation ; feature extrac-tion

合成孔径雷达；曲线合成孔径雷达；运动补偿；特征提取

The results show that, when the volume of the secondary room is 1/3 of that of the primary room,the sound energy decay in the primary room is greatly in- fluenced by the secondary room at an aperture size of less than 10% of the wall,that the energy decay curve and the coupling con- stant in the primary room gradually change with the aperture size,and that the effect of the secondary room on the acoustics in the primary room is uniform.

发现在耦合空间体积与主厅体积比为1/3的条件下，当耦合窗面积与隔墙面积比小于10%时，耦合空间对主厅的声能衰减有较大影响；主厅的声能衰减曲线和耦合常数随开口的改变而逐渐发生变化：耦合空间对主厅各点音质的影响比较均匀。华南理工大学物理科学与技术学院；华南理工大学物理科学与技术学院广东广州 510640；广东广州 510640

Based on large aperture Nd∶YAG slabs and dichromatic coatings, a high-efficiency V-shaped active-mirror laser was designed, which was composed of four modules with two large-aperture Nd∶YAG slabs in each module.

基于大口径片状Nd∶YAG介质，采用双色膜技术设计并研制了高效率V形有源镜激光器。该激光器有四个模块，每个模块包含两片大口径Nd∶YAG片状介质。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。