在太赫兹(THz)成像技术的发展中，太赫兹数字全息术是重要的的研究方向之一，受到人们的广泛关注。在参考光为点光源的条件下，以字母E作为研究目标，根据已有面阵探测器技术利用仿真实现了2.52 THz离轴傅里叶全息成像，并研究了其成像特性。仿真实验证明，在一定实验条件下，太赫兹离轴傅里叶全息成像能够再现出原始图像，对大小为124 pixel×124 pixel的傅里叶变换全息图截取，通过对截取后的全息图再现发现，横向和纵向截取大小为全息图本身的一半以上时，才能够再现出原图像，否则再现像模糊。中心截取的大小大于40 pixel×40 pixel时，可再现出原图像，否则再现像发生畸变。

In the development of terahertz (THz) imaging technology, terahertz digital holography is one of the most important research directions attracting widespread attention. According to the parameters of existing surface array detectors, the 2.52 THz off-axis Fourier holographic imaging is simulated and studied with a point light source serving as the reference light and the letter E working as the target. Simulation experiments validate that the terahertz off-axis Fourier holographic imaging can reconstruct the original image on the conditions provided. By reconstructing the intercepted Fourier transform hologram of 124 pixel×124 pixel, it can be found that only if the size of the intercepted hologram is larger than half of the original hologram horizontally or vertically, the original image can be reconstructed, or the reconstruction result will be vague. In the same way, the reconstruction result will be abnormal if the centrally intercepted hologram is smaller than 40 pixel×40 pixel.