结果表明：直接对无透镜傅里叶数字全息图进行傅里叶逆变换可同时得到与物体完全相同的再现像及其共轭像；
The experimental result shows: In the digital Fourier holography, the reconstructed image and the conjugate image can be obtained by use of Fourier inverse transform directly.
数字全息中直透光和共轭像的去除是影响到全息能否得到更广泛应用的关键因素。
The elimination of the zero-order diffraction and conjugate image in the digital holography is the key factor influencing whether or not the holography is utilized widely.
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