Part 1 : manufacturing linear motion components , such as : ball screw and nut , rolled and ground linear shaft units and slides 第一部分为自行制造的直线运动系列组件，包括：滚珠丝杆副，光轴导轨副和滑台。
While the star test has been around for centuries learning it has often been hampered by messy mathematics and its visual nature 光轴矫正是大约有几个世纪前就诞生了，它经常被杂乱的数学和视觉性质搅在一起。
Parallelization tester is used to test the parallel degree of multi - optic - axes system of the large scale photoelectric theodolite with precision less than 0 . 5 arcsec 摘要平行度测试仪是检测大型光电经纬仪多光轴系统平行度的设备，要求平行度测试仪的精度要达到0 . 5 " 。
Conductivity mechanism of a - quartz is ionic , and alkali and hydrogen ions moving in channels parallel to the c - axis are the predominant current carriers 石英的导电机制主要为离子导电，载流子可能为碱金属离子和氢离子，这些碱金属离子和氢离子主要在平行于光轴的通道中运动。
Main research content including : 1 ) have studied a same diameter shaft , study how to make use of the change of natural frequency to discern the transverse crack 本文主要的研究内容包括： 1 )以最简单的等直径光轴为例，研究了利用固有频率的变化来识别光轴上横向裂纹的可行性。
Using star testing astronomical telescopes as a guide , your telescope will perform to the best of it ' s abilities and perhaps it will show images better than you would have believed possible 使用光轴矫正已经成为使用天文望远镜时必备的一本指南，这样你就能了解你的望远镜是否充分发挥出它的性能。
The paper discusses , on energy density of laser beam , emanative angle of laser beam and malajustmentdegree of laser beam s axes , the feasibility on adding irradiation of a certain laser irradiator 从激光束的能量密度、瞄准光轴与激光束光轴的失调度、激光束的束散角三个方面论述某型激光照射器增程照射的可行性。
" close - up performance of the summicron - m is on the same level as the performance at infinity setting ( actually infinity is that distance where the incoming light rays are parallel to the optical axis 近摄表现与无穷远时相当(事实上,无穷远处的光线是平行光轴入射的.对多数镜头而言,大约100倍焦距的物距时,入射光满足这一条件)
The result indicates : adopting certain data processing method , it is feasible to make use of the change of natural frequency to discern the transverse crack in the shaft , and the precision discerned is very high 结果表明，采用一定的数据处理方式，利用固有频率的变化来识别光轴上的横向裂纹是完全可行的，并且识别的精度很高。
There are two methods to obtain composite achromatic wave - plate . one is to combine with identical material , in this case we select the thickness of each plate and determine the angle of their optic axes 复合消色差波片的设计主要摘要第2页采用以下两种方法，一种是利用同种材料组合，根据工作波段来选取各片的厚度，设计光轴之间的夹角。
