为了降低对随机相位板的精度要求，提出在光学扫描全息系统中采用二值化相位光瞳对多层3维物体进行全息成像的方法，进行了相关的理论分析和数值模拟。结果表明，与采用连续随机相位光瞳函数的情况类似，采用二值化相位光瞳也能在图像重构时有效地消除模糊的离焦层图像；同时，重构图像的质量与采用的二值随机相位光瞳的随机度有关，当随机度不太低时，可得到质量能接受的重构图像。这一结果对于降低实验条件的要求是有帮助的。

In order to reduce the precision requirements of random-phase pupil, an optical scanning holography method using a binary random-phase pupil was proposed, which can be used to acquire the holographic information of a multi-section object. Series of theoretical analysis and numerical simulation were conducted. It is found that, similar as the optical scanning holography using a continuous random-phase pupil, the one using a binary phase pupil can also effectively eliminate the haze risen from the de-focus sections when the in-focus image is reconstructed. Furthermore, the reconstructed image quality has a close relationship with the degree of randomness on binary random-phase pupil, and an acceptable reconstructed image can still be obtained if randomness degree is not too low. This result is helpful for reducing the requirements of experimental conditions.