High deflection efficiency is one of the urgent requirements for practical liquid crystal optical phased array (LC-OPA). In this paper. we demonstrate that high order grating lobes induced from fringe effect are the most important issue to reduce occupation of main lobe. A novel theoretical model is developed to analyze the feature of grating lobes when the device of LC-OPA is working... https://midwaysportes.shop/product-category/lacrosse-goal/