SPIE Proceedings [SPIE SPIE's International Symposium on Optical Science, Engineering, and Instrumentation - Denver, CO (Sunday 18 July 1999)] Photonic Devices and Algorithms for Computing - <title>Crystal substrate integration of free-space optical computing systems</title>Liu, Liren; Zhou, Changhe; Yin, Yaozu; Guo, Yingchun; Li, Jianlang; Wang, Huaisheng; Liu, Youwen; Yan, Xiaona; Liu, Bo; Xu, Liangying; Li, Yao; Iftekharuddin, Khan M.; Awwal, Abdul Ahad S. · 1999