This book is an attempt to provide a systematic and accessible presentation of the practical lore of electro-optical instrument design and construction: in other words, it's the book I needed as a graduate student, but couldn't find.
It's intended in the first instance for use by oppressed graduate students in physics and electrical engineering, who have to get their apparatus working long enough to take some data before they can graduate. When they do, they’ll find that real-world design work has much the same harassed and overextended flavor, so in the second instance, it’s intended as a self-teaching guide and professional reference for working electro-optical designers.
Update: February 2nd 2022
BEOS 3rd Edition Available: 20% Discount Until May 31, 2022
It's fully revised, and about 30 percent longer, besides bringing in things learned in twelve years of consulting with EOI. For the discount, order from wiley.com and use the code BEOS3.