In laser pointing related applications, position and angular errors of a laser beam are often coupled together when only the centroid of the laser spot is considered. In this study, the decoupling of the position and angular errors is achieved from one single spot image by utilizing a neural network technique. In particular, the successful application of the neural network technique relies on some novel experimental treatments, including using an appropriate small focal length lens and tilting the detector, to physically enlarge the contrast of different spots. The technique with the corresponding new system design may prove to be instructive in future design of laser pointing related systems.
Xia Lei, Hu Yuanzhang, Chen Wenyu, Li Xiaoguang. Decoupling of the position and angular errors in laser pointing with a neural network method[J]. High Power Laser Science and Engineering, , (): .
