About the Author: C. Breck Hitz is Executive Director of LEOMA, the Laser and Electro-Optics Manufacturers' Association. He was the founding editor of Lasers & Applications magazine, and a former editor of Laser Focus World. J. J. Ewing is the President of Ewing Technology Associates, Inc. His pioneering work on high-efficiency, ultraviolet lasers led to the discovery and development of the rare gas halide excimer lasers. Jeff Hecht is a contributing editor to Laser Focus World and correspondent for New Scientist magazine. He was a cofounder and contributing editor to Lasers & Applications. Mr. Hecht is the author of ten books, including Understanding Lasers: An Entry-Level Guide (Wiley-IEEE Press).