The product is the second edition of the book "Optical Metrology" 2nd Edition by Kjell J Gåsvik, published by Wiley & Sons, Incorporated, John. This hardcover textbook, with 392 pages, covers the subject areas of optics and telecommunications. The revised edition, provides a comprehensive overview of optical metrology for students and professionals in the field. With a focus on English language, this book offers valuable insights and information on the topic. Second edition