讨论了实时全息法应用于检测透明物体的情况下获得高衍射效率和高衬比条纹的若干问题。给出了同时获得高亮度检测场和高衬比条纹的最佳参数。在最佳光束比等于１和最佳相位调制度为１．４２时，衍射效率和光能利用率均可达到２９％。 The problems of high diffraction efficiency and high contrast ratio streaks with real-time holography applied to the detection of transparent objects are discussed. The best parameters for simultaneous detection of high brightness and high contrast streaks are given. When the optimal beam ratio is equal to 1 and the optimal phase modulation is 1.42, the diffraction efficiency and the light energy utilization rate can reach 29%.