Tsunoda Y, Takeda Y
Appl Opt. 1974 Sep 1;13(9):2046-51. doi: 10.1364/AO.13.002046.
The random phase sampling method that has been proposed to make high quality and high storage density holograms capable of storing image information is described and discussed from the aspect of the quantitative characteristics of its reconstructed image. The method enables the uniform distribution of light energy over the hologram area made on the exact Fourier transformed plane. The details of the characteristics of the method are investigated, especially with respect to the luminance tone linearity, the signal-to-noise ratio, and the resolution to give good agreement with the results of a calculation. In the experiment, reconstructed images with high quality were obtained from holograms of 2-mm diam, which were made by 10(6) sampling and random phase shifting. By using the random phase sampling medthod, an image retrievel model system storing twenty kinds information was developed. This system holds promise of being used in various practical applications such as holographic ultramicrofilm system or a holographic videopackage system.
从重建图像的定量特性方面对已提出的用于制作能够存储图像信息的高质量、高存储密度全息图的随机相位采样方法进行了描述和讨论。该方法能使光能均匀分布在精确傅里叶变换平面上制作的全息图区域。对该方法的特性细节进行了研究，特别是关于亮度色调线性、信噪比和分辨率，以使其与计算结果达成良好一致。在实验中，通过10⁶次采样和随机相移制作了直径为2毫米的全息图，并从中获得了高质量的重建图像。通过使用随机相位采样方法，开发了一个存储二十种信息的图像检索模型系统。该系统有望用于各种实际应用，如全息超微胶片系统或全息视频包系统。
