Pointing and tracking errors due to localized distortion induced by a transmission-type antenna in intersatellite laser communications.
A truncated ellipse Gaussian model to express localized distortion is developed to a transmission-type optical antenna, based on which the effects of localized deformation on pointing and tracking errors are researched. It is shown that localized distortion has the greatest influence on pointing and tracking errors when distortion deepness h approximately 0.8 lambda, which does not depend on other distortion parameters. To reduce the impact of localized deformation on pointing and tracking errors, the machining precision of the objective lens of the transmission-type antenna should be much better than 0.8 lambda. The requirement of the machining precision for lenses is lower than that for mirrors. The maxima of pointing and tracking errors due to the localized distortion with different radii are given. We hope the results can be used in the design of intersatellite optical communication systems.
Yang
Yuqiang
Y
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China. yqyang0@gmail.com
Tan
Liying
L
Ma
Jing
J