基于强度传输方程的非干涉相位恢复技术可以通过求解方程从强度测量中计算出丢失的相位信息。但是，实际成像中，由于成像系统中透镜孔径的限制作用，会对恢复相位的分辨率产生一定的影响。本文将倾斜光照的思想引入到基于强度传输方程的相位恢复中，在空间光调制器上加载调制函数，将平面波以不同的波矢倾斜入射到物体上，使透镜孔径的通带覆盖不同的频率空间。对这些通带所覆盖的场进行求和从而获得具有更大通带的合成场，提高了系统在高频领域的成像能力。同时，分别构建了基于4f和单透镜的多角度倾斜光调制系统，并由系统采集的强度图像结合强度传输方程求解出更好的相位结果。实验证明了所提方法在有效提高原有方法分辨率的同时保证了恢复相位的精度。

The non-interferometric phase retrieval technique based on the transport of intensity equation (TIE) is employed to calculate the missing phase information from the intensity measurement. However, since the limiting effect of the lens aperture is existed in the actual imaging system, a certain effect on the resolution of the recovery phase is under consideration. In this paper, the concept of tilted illumination is introduced into the phase retrieval based on the TIE, the modulation function is loaded on the spatially modulated light (SLM), and the plane wave accompanies with various different wave vectors oblique impinging onto an object, then the pass band of the lens aperture cover the frequency spaces with different parts. Summing the fields covered by these shifted passbands yields, and obtain a synthesized field with an enlargened passband, which improve the imaging ability of the system in the field of high frequencies. At the same time, the multi-angle tilt light modulation system based on 4f and single lens is constructed, and the better phase results are obtained by the measured intensity images combined with the TIE. The experimental results show that the proposed method can improve the resolution of recovery phase without compromising the numerical error of the recovery results.