About

emetrology is a website dedicated to building a valuable resource for the metrology community. Our mission is to support users in design, manufacturing, and research by providing accessible, curated information that enhances their metrology knowledge and practice.

The site offers organized content on various metrology topics, including books, key contributors in the field, equipment manufacturers, relevant standards, and educational materials. The site is open to user suggestions in the topics covered by the site.

The emetrology website is curated by Prof. Jay Raja, drawing on decades of academic, research, and industry project experience in precision metrology. The site is work in progress and suggestions for improvement are welcome.

Dr. Jay Raja earned his Ph.D. in 1980 from the Indian Institute of Technology (IIT) Madras, specializing in surface metrology under the mentorship of Prof. V. Radhakrishnan. Following his doctoral work, he pursued postdoctoral research with Prof. David Whitehouse from 1980 to 1983, and subsequently at the University of Wisconsin–Madison in the Department of Mechanical Engineering with Prof. Marvin DeVries from 1984 to 1985.

In 1985, Dr. Raja began his academic career at Michigan Technological University. He joined the University of North Carolina at Charlotte in 1989, collaborating with Prof. Robert Hocken to help establish the Center for Precision Metrology. He played a key role in shaping both the academic and research programs in precision metrology at UNC Charlotte. From 2000 to 2008, he served as Chair of the Department of Mechanical Engineering and Engineering Science, before transitioning to the Provost’s Office in 2008 as Senior Associate Provost, overseeing academic administration. He retired from this administrative role in 2022 and currently serves as a professor in the phased retirement program in the Department of Mechanical Engineering.

Dr. Raja has made significant contributions to standards development in the field of metrology. He chaired the ASME B89.3.1 standards committee on roundness and remains an active member. He has also chaired the ASME B46.1 committee on surface texture and serves on the ASME Board on Standardization. Additionally, he contributes as a subject matter expert to ISO committees related to surface and form metrology.

His research interests focus on surface and form metrology with applications in manufacturing process control and functional performance evaluation of engineering components. His work has been supported by agencies such as the National Science Foundation (NSF), the National Institute of Standards and Technology (NIST), and industry leaders including Cummins, Caterpillar, Ford, Kodak, Veeco, and Mahr-Federal.

Dr. Raja teaches courses in metrology and manufacturing and has authored or co-authored over 75 publications and a book. He has supervised 27 master’s theses and 11 doctoral dissertations in manufacturing, surface metrology, and form metrology.