这个全息图重现像的观察范围很宽，视场不受透镜孔径的限制。
The visual field of the reconstructed image is extended and is not limited by the aperture of the lens.
本文讨论了薄透镜孔径对透镜傅里叶变换公式导出带来的困难，较全面地分析了使用该公式应满足的条件。
The paper discusses the difficulty presented in deducing Fourier transform formula due to the lens aperture restriction, and analyzes the desired conditions in using the formula in great detail.
比如，孔径为8英寸(203.2mm)，焦比为f/10的透镜，其焦距为203.2 x 10 = 2032mm。
For example, the focal length of an 8" (203.2mm) aperture with a focal ratio of f/10 would be 203.2 x 10 = 2032mm.
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