聚焦轴

The zero-position is the position of the Z-axis, with which each measuring objective of the autocollimator

位是Z 轴的位置，通过它每一个测量物镜由自准直仪聚焦到各自自定心固定器的最高边缘上。

Common Reflection Surface stack is a brand-new and special ZO imaging method, the theory of CRS stack stems from paraxial ray theory, the biggest difference between CRS stack and conventional ZO imaging method is that it consider a reflector R as a circular reflector segment Cr placed in the vinicity of reflector R, Cr can be seen as the second order approximation of the reflector. The CRS traveltime surface is the multi-coverage reflection response of the reflector mirror assigned to R.

共反射面元（CommonReflection Surface=CRS）叠加技术是一种全新的、特殊的零偏移距剖面成像方法，CRS迭加理论源于傍轴射线理论，它与普通的零偏移距剖面成像方法的最大区别是它认为地下反射层是由许多个小反射弧段互相叠合组成的，认为来自某反射点附近的一个邻域内的反射信息都可以对该反射点的成像作出贡献，因此对该反射点进行零偏移距成像时就应该聚焦更多的能量参与迭加。

A laser alignment system can measure and adjust the concentricity from cathode to rf circuits.

文中采用的解决方法是使用He-Ne激光器测量从阴极到磁聚焦管的不同轴度，并在最终的装配前用机械调整结构校正。

The parallel light rays of the prnicipal axis that approach a convex lens can converge to the focal point.

只有在近轴光线条件下，平行光通过凸透镜才可近似聚焦于一点。

In order to achieve the setting up angle should be monitored and debugged, a new approach is brought up. With the CCD receiving the focusing spot of parabolic mirror, while rotating the parabolic mirror, collecting the focusing spot location information, the eccentric angle between the optical axis and the structural central axis could be found. System principle and design have been studied.The experimental results meet the need to test and monitor to the setting up angle of the discal parabolic mirror.

为了实现对抛物面反射镜的装配角度进行监控和调试，提出了一种通过CCD接收回转抛物面镜的聚焦光斑，同时旋转抛物面镜，采集光斑重心位置信息，从而计算出光轴与结构中心轴之间的偏心角的实现方案，并从方案原理和设计上对其进行研究和实验，实验结果证明该系统能应用于对盘状抛物面反射镜装配角度的测试和监控。

The refraction, reflection and propagation of the acoustic wave in a rod are studied quantitatively when a line-focused probe is employed in an axial scanning in immersion testing. The shape and position of the first and second focal line of the probe in the cylinder are calculated.

定量研究了采用线聚焦探头、液浸法、轴向扫描探伤时，棒材中声波的折射、反射和传播规律，计算得到了工件中的一次焦线和二次焦线的形状和位置。

The assembly method of the invention has the main principles that a semiconductor laser, an optical coupled apparatus and a fiber head are orderly arranged, and the optical axes of the semiconductor laser, the optical coupled apparatus and the fiber head are arranged in a same straight line; the focal plane of an output beam which is focused on the fiber head is changed through utilizing and adjusting an adjusting device which can cause a beam to deviate; the sensitivity of the assembly adjustment of the adjusting device in the course of fixing is reduced.

本发明的方法的主要原理是将半导体激光器、光学耦合器件、光纤头依次排列，并使它们光轴在同一直线上，然后通过利用一使光束发生偏移的调节器件，通过调节该调节改变聚焦于光纤头的输出光束的焦平面，降低调节器件装配调节的固定时的敏感性。

The influence of the focal length in focal lens on the bottle radius and bottle length is discussed.

讨论了聚焦透镜的焦距f对径向暗域最大尺寸及轴上暗域长度的影响。

The main products that can be manufactured in our company are Bore-Expanding machine, Pressing tuning page machine, Pressing beta board machine, Polishing machine, and Fretsaw etc used in piano factory; Anchor pole drill for colliery; Vacuum coating apparatus; high-energy ultrasonic focalizing equipment used for lithotritizing and cancer curing; weld- line grinding machine used in the process of weld; Assisting walk appliance, Turn-over bed and move-ride trestle for nursing; Product line of Sandwich PU panel manufacture.

公司近年生产的主要产品有：钢琴厂用的扩孔机，压弦轴机，压贝司板机，抛光机，圆锯等；用于市政的管道疏通机；用于煤矿企业的锚杆钻机；用于各种行业的真空镀膜机；用于医疗行业的高能超声聚焦肿瘤治疗机，碎石机；用于焊接行业的焊缝碾压机；用于护理行业的助行器，翻身床，移乘架；用于建筑行业的聚氨酯复合连续生产线等。

This paper only carried on the elementary research about 3D coaxial feeding head. Many problems didn't be solved, including development of new feeding device and systems of detecting and controlling.

本文仅对其中数控双轴转动聚焦系统进行了初步研究，但还有许多问题需要解决，如适合激光再制造的新型送粉器的研制，激光再制造过程中的多轴联动，智能监控系统等。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。