Richard Neil Youngworth, Ph.D. is a the founder and chief engineer of Riyo LLC an optical engineering company in Boise, Idaho, USA. He is an experienced optical designer and engineer with industrial expertise that spans numerous facets of the optics field including metrology, design, manufacturing, analysis, and software analysis. He is considered an international expert on producibility and tolerance analysis of optical components and systems. He has spent a large portion of his industrial career working on optical systems in the challenging transition from ideal design to successful volume manufacturing.Dr. Youngworth has authored and delivered sundry papers, talks, and lectures on optical design and engineering. He currently teaches an SPIE short course “Practical Optical System Design” SC003 and taught on “Cost-Conscious Tolerancing of Optical Systems” SC720/SC947 for over fifteen years. He maintains additional professional society activities, and provides leadership and support on standards activities with ISO and the Optics and Electro-Optics Standards Council (OEOSC). He is the chair of ISO/TC 172/SC 1, convener of ISO/TC 172/SC 1/WG 2, and the US Head of Delegation for ISO/TC 172/SC 4 on telescopic systems. Dr. Youngworth is a Fellow of SPIE and Optica. Dr. Youngworth has taught physics at the university level as a senior lecturer at Boise State University and has had a research affiliation with the Wyant College of Optical Sciences at the University of Arizona. He is the lead optical design and analysis engineer at Riyo LLC for internal work and customer programs, optical software work, manufacturing and technology development support, and also does sales and marketing for the company. Before forming Riyo LLC, Dr. Youngworth was a sole proprietor with exclusive representation as Director of Optical Engineering for Light Capture, Inc., a Senior Optical engineer for Ball Aerospace & Technologies Corp., and Research Associate at Eastman Kodak. He has a B.S. in electrical engineering from the University of Colorado at Boulder and earned his Ph.D. in optics at the University of Rochester by researching tolerance analysis of optical systems.Please contact for further information including resume/CV.Specialties: Optical tolerancing, software for optics, optical design, optical metrology, and optical engineering and analysis