光纤通信技术在光电经纬仪中的应用

光电经纬仪等光电跟踪测量仪器在数据传输过程中，方位轴上的导电环存在传输速率低、带宽窄、抗电磁干扰能力差的问题，当数据量较大时，导电环无法实现实时传输，针对这些问题，提出了用光纤取代导电环的方法。在原导电环位置安装一对光准直器，利用光能够在空气中传播的特点，实现光信号在两段光纤之间的耦合。从而将电信号的接触式传播变为光信号的非接触式传播。光纤传输的优点使设备的整体性能得到提高。

Application of Optical Communications in Photoelectric Theodolite

In the course of data transmission of photoelectric theodolites, there are a lot of limitations on the slip ring of the photoelectric theodolites, such as low transfer rate, narrow bandwidth and weak EMI resistance. Especially when the data size is large, the slip ring is unable to real-time transmit the data. In order to solve these limitations, the method of replacing slip ring with optical fibres is put forward. In the position of the slip ring,a couple of collimators are fixed, utilizing the characteristics that light beam can propagate in air, so that realizing the coupling of optical signal between two optical fibers. Thus non-contact propagation of optical signal is realized instead of contact propagation of electrical signal. The advantages of optical fiber will improve the overall performance of the instrument.