The product is a textbook titled “Thermal Imaging Systems (Optical Physics and Engineering)” by J.M. Lloyd, published in 1982. It is a hardcover book written in English and falls under the subject of physics. With a length of 9.2 inches and a width of 6.1 inches, this 456-page textbook provides in-depth information on thermal imaging systems and their applications in various fields. Lloyd’s expertise in the subject makes this book a valuable resource for those interested in the physics of thermal imaging technology.