光轴的平行性校准在多传感器光电系统中起着重要的作用。为了使被动光学设备的光轴校准满足广泛适用的需求,提出一种基于干涉条纹的光轴平行性校准方法。在平行光管法的基础上建立基准光轴,对接收光学系统反射形成的牛顿环干涉条纹进行拟合,从而计算光轴间的夹角。利用搭建的校准系统平台对激光测距机的发射光轴和接收光轴进行光轴的实际校准。实验结果表明:接收光轴与基准光轴的平行性测量精度优于5″,能够较好地满足校准多传感器光电系统的应用需求,验证该方法的有效性。所提方法的可视化校准过程可以提高校准效率,具有操作简单、实用性强和测量精度高的优点。

The calibration of optical axis parallelism plays an important role in multi-sensor photoelectric systems. Herein, a method for calibrating the optical axis parallelism based on interference fringes is proposed for calibrating the optical axes of passive multi-sensor photoelectric devices to meet the general application requirements of optical systems. The reference optical axis is established based on a collimation method. Newton ring interference fringes form by the reflection of the receiving optical system are fitted. Thus, the angle between the optical axis is calculated. The calibration axis of a laser distance-measuring machine is used to calibrate the optical axis of a transmitter and receiver. Experiment results show that the measurement accuracy for the receiving optical axis parallelism and the reference optical axis is better than 5″, satisfying the application requirements for calibrating multi-sensor photoelectric systems. The results also verify the effectiveness of the proposed method, whose visual calibration process can improve the calibration efficiency of passive optical devices and has the advantages of simple operation, practicability, and high measurement accuracy.