镜平面

In this paper , on the basis of the vector theory of optical refraction a scanning trace of 45 ° multi-parallel scanning mirror was analysed , and the corresponding formulas are given.

本文在光反射矢量理论基础上，对45°镜多元并扫探测器并扫成像特性和扫描轨迹进行了分析，得到了探测平面上任意位置探测器元的扫描轨迹公式。

Through the moderation of transmission chain of the gear wheel to control the tiny turn of the reflector .

在微调机构的设计中，利用齿轮传动链的减速作用来实现对平面反射镜的微转动，从而改善测量精度。

One slightly concave cylindrical lens combination is used to change one laser beam into small sector in small angle, and one reflector projects the laser beam to prism driven by a motor to rotate in high speed to produce one reciprocating and scanning small sector plane.

采用微凹柱面透镜组将激光光源发射的一束激光拉成具有微小夹角的小扇面，利用反射镜将此激光束透射到由电机驱动的高速旋转多面棱体上，使激光束产生一个小扇形往复激光扫描光平面。

The Control System for Sealed-off and all-metal RF-excited CO_2 Lasers;2. An experimental study of 100W radio excited diffusively cooled all-metal rectangle waveguide CO_2 laser was carried out.

对新型百瓦级射频激励扩散型冷却全金属矩形波导CO2激光器进行了实验研究，实验中采用了CASE-I平行平面腔，试验结果表明，在采用10%透过率的输出镜时，激光输出最大功率达到146 W，电光转换效率达到17。

On strength computation,the finite element models of rotating mirror were established according to the real structure of the mirror,and the rotating three-faced beryllium mirror were analysed.Results display that the surface deformation magnitude of the mirror is approximately 0.334 6 μm,and the maximum stress is 0.204 GPa at 600 m/s of edge linear speeed.The regions of maximum stress are on the axial hole and symmetric to symmetrical planes of mirror body,and keep beelines to surfaces.On the modal analysis,the results show that the first and second modals of bending vibration exist around 3.4×105 r/min and 6.6×105 r/min,which appear binate and orthogonal respectively,and another modal belongs to the first torsional vibration that occurs by 5.13×105 r/min.

运用该方法得出转镜镜面变形量、内部应力分布和振动模态参量的定量数值：在边缘线速度600 m/s下，三面体铍转镜的最大变形量为约0.334 6 μm；最大应力0.204 GPa，位于轴孔附近并与镜面距离最短处；两个在互相垂直平面内的一阶弯曲振动模态发生在3.4×105 r/min附近，一阶扭振点位于5.13×105 r/min附近，两个二阶弯曲振动点位于6.6×105 r/min附近。

To reduce the marking distortion , using the vertical 2 - dimension galvanometer distributing and f field lens focalize , the distance of the second galvanometer to the machining plane is the focus f . to avoid too hign temperature to distroy the resonance cavity because of too long marking time , cooling system and self - protector is used in the design

为减少打标畸变，采用垂直二维振镜分布， f物镜聚焦，将激光束经第二个振镜反射后到加工平面的距离为焦距f ，为了避免打标时间过长，温度过高破坏谐振腔，在设计中加上冷却系统和自我保护装置。

Methods Eighty ASA physical status Ⅰand Ⅱpatients 18~65 years of age, scheduled for URL, were randomized into group CSEA(n=40) and group EA (n=40).Pinprick method was employed to determine anesthesia level, and local anesthetic dosage, onset time, time to attain optimal anesthesia level and anesthesia effect were recorded. Hypotension, shiver, postoperative headache and lumbodorsal pain were observed.

选择ASAⅠⅡ级、年龄18岁～65岁拟行尿道输尿管镜下碎石术的患者80例，随机分为腰麻—硬膜外联合麻醉和硬膜外麻醉两组；每组40例，采用针刺法测定麻醉平面，观察两组病例用药量、起效时间，上升到各个麻醉平面上界的时间及麻醉效果；术中患者出现低血压、寒战、术后头痛、腰背痛发生率。

The static analysis for the flat reflector of interferometer in unassembled and assembled is studied by finite element method, horizontal and vertical placement under gravity load is analyzed. The calculated PV and RMS values are used to determine whether the distortion and the structure of fixation are reasonable or not.

应用有限元方法对干涉仪的装配前后的平面反射镜进行了静力学分析，对其在重力作用下水平和垂直放置时进行了分析，通过计算镜面变形的PV值和RMS值来评价是否超差及固定反射镜的结构是否合理。

In Drsophila eye, PCP is evident in the coordinated orientation of ommatidia that rotate 90° in opposite directions in the dorsal and ventral halves of the eye during eye development. The key point for ommatidia to rotate correctly is the decision of R3/R4 fate that is controlled by PCP.

平面细胞极性在果蝇复眼的功能是在发育过程中协调位处背腹部的小眼各自旋转90度，使其依背腹轴形成镜像对称，而要使此过程有正确的旋转角度就要有正确的R3/R4细胞命运的选择，平面细胞极性的作用正是调控R3/R4细胞的选择。

The telescope tube front part is the opticator, behind is a ring-like cabin, inside this cabin, in the telescope host mirror focal-plane is placing group of scientific instruments; The solar cell windsurfboard and the antenna middle partially stretch out from the tube.

镜筒的前部是光学部分，后部是一个环形舱，在这个舱里面，望远镜主镜的焦平面上安放着一组科学仪器；太阳电池帆板和天线从筒的中间部分伸出。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。