John Stack, president and COO of optics and electronics imaging products supplier Edmund Industrial Optics, has been named president of the Automated Imaging Association for 2003-2004. He succeeds Mike Kelley, whose term ended Feb. 6.   . . .   Opto Speed, a developer of optoelectronic modules for the communication, test and measurement, medical and defense markets, has established a US sales office in Silicon Valley, Calif., to be run by Ching-An Cheng, sales manager, and Daniel Hung, application engineer.