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1·Neither the coherent optical input image nor the Fourier transform hologram of the reference image is required by this system.

这个系统既不需要相干光输入图像，也不需要基准图像的付氏变换金息图。

2·For synthetic aperture digital lensless Fourier transform hologram, a screen-division reconstruction method is proposed based on theoretical analysis.

针对合成孔径数字无透镜傅里叶变换全息图，在理论分析的基础上，提出了相应的分幅再现算法。

3·The critical part of this sight is a holographic optical elements combined with a lensless Fourier transform hologram and a holographic beam transformer.

瞄准具的核心部件是由一块无透镜傅里叶变换位相全息图和一块全息光束变换器组成的全息光学元件。

4·Mathematical representations for three kinds of reconstruction algorithms (Fresnel integral, convolution and Fourier transform) of digital hologram are deduced based on the diffraction theory.

在衍射理论基础上详细推导了三种再现算法(菲涅耳积分变换法、卷积法、傅立叶变换法)的数学表示。

5·A new optical encryption technique based on double random phase computer-generated hologram of asymmetry fractional Fourier transform is presented.

提出了一种利用不对称分数傅里叶变换和双随机相位编码对图像加密的方法。