Eichmann G, Kostrzewski A, Kim D H, Li Y
Appl Opt. 1990 May 10;29(14):2135-47. doi: 10.1364/AO.29.002135.
Several new higher-order spatial symbol recognition methods for optical symbolic substitution-based calculations are presented. In the case of logic processing, higher-order symbolic substitution (SS) rules can implement multivariable logic functions. For binary arithmetic calculations requiring carry propagation by simultaneously processing a number of bits, the computational speed increases. Finally, in image processing, the higher-order SS rules allow the use of larger local windows. For a higher-order spatial symbol recognition, both multiplicative and additive logic techniques are discussed. Four different higher-order SS recognition optical architectures are suggested: a multireflecting technique using an optical cavity, a lenslet array, an optical phase conjugation, and a content-addressable memory. Either dual-rail or triple-rail optical spatial intensity encoding is employed. Some preliminary experimental results are also presented.
提出了几种用于基于光学符号替换计算的新型高阶空间符号识别方法。在逻辑处理方面，高阶符号替换（SS）规则可实现多变量逻辑函数。对于需要通过同时处理多个比特来进行进位传播的二进制算术计算，计算速度会提高。最后，在图像处理中，高阶SS规则允许使用更大的局部窗口。对于高阶空间符号识别，讨论了乘法和加法逻辑技术。提出了四种不同的高阶SS识别光学架构：一种使用光学腔的多反射技术、一个微透镜阵列、光学相位共轭和一个内容可寻址存储器。采用了双轨或三轨光学空间强度编码。还给出了一些初步实验结果。
