固定在支架左边的是光学追踪器，它与固定在前下方的碟形毫米波控制系统连接。
Mounted on the left side of the pedestal is the optical tracker with the dish-type millimetre-wave command link being mounted forward and below.
目的评价开放式MR扫描仪结合光学追踪系统行椎间盘造影术操作方法的可行性及安全性。
Objective To evaluate the feasibility and safety of lumbar disc discography carried out in an open MR scanner with an optical tracking system.
涵盖的主题包括：几何光学射线追踪，畸变，镜头设计，孔径和停止，辐射计和光度法。
Topics covered in geometrical optics include: ray-tracing, aberrations, lens design, apertures and stops, radiometry and photometry.
利用标量衍射理论，对相干光学系统中光场进行空间追踪模拟，该方法可以对光学系统中激光光场的分布进行预。
In this paper, based on scalar diffraction theory, light fields in the coherent optics system have been calculated by the spatial tracing simulation method that USES FFT.
建立了一种大功率LED的封装结构，二次光学设计采用了微透镜阵列技术，运用光线追踪法研究了这种封装结构的光学性能。
A packaging structure of high-power LED was presented, microlens array was employed in the secondary optical design, optical properties of the package was studied using Trace pro.
天文学家借助哈勃太空望远镜的光学过滤器，可以准确查明该星云的化学组成、温度和密度，并追踪恒星的死亡过程。
Optical filters in the space telescope allowed astronomers to precisely determine the nebula's chemical makeup, temperature, and density, and to trace the stages of the star's demise.
最后，对该非球面镜系统进行物理光学传播追踪，分析其光强分布。
At last, physical optics propagation through the aspheric system is analyzed and then the irradiance distribution is discussed.
当在夜间运行但是却无法得到追踪资料时(光学相机出现问题)，ACS会从模式7转换到模式2。
It switches from mode 7 to mode 2 when it is orbit night and no tracking data is provided (there is a problem with the optical cameras).
当在夜间运行但是却无法得到追踪资料时(光学相机出现问题)，ACS会从模式7转换到模式2。
It switches from mode 7 to mode 2 when it is orbit night and no tracking data is provided (there is a problem with the optical cameras).
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