McAulay A D
Appl Opt. 1987 May 15;26(10):1927-34. doi: 10.1364/AO.26.001927.
Optics has advantages for overcoming limitations arising when applying existing electronic technologies to real-time parallel computation. In particular, spatial light modulators (SLMs) permit simultaneous storage, multiplication, and/or complex interconnection. A simple expert uses an SLM crossbar switch to provide a flexible and fast implementation of combinatorial logic. A second expert system, illustrated using medical diagnosis, uses the Bayes theorem to update recursively the probabilities of various illnesses given additional symptom information. The a priori probability matrices are stored in SLMs which provide matrix-vector multiplication and interconnection. Computation of the best next symptom question is possible because of the high speed.
光学在克服将现有电子技术应用于实时并行计算时所产生的局限性方面具有优势。特别是，空间光调制器（SLM）允许同时进行存储、乘法运算和/或复杂的互连。一个简单的专家系统使用SLM交叉开关来灵活快速地实现组合逻辑。第二个专家系统以医学诊断为例，使用贝叶斯定理根据额外的症状信息递归更新各种疾病的概率。先验概率矩阵存储在SLM中，SLM提供矩阵向量乘法和互连功能。由于速度快，所以能够计算出最佳的下一个症状问题。
