A complete optical systems design course for general optical engineers! The "first cut" design of an optical system -- anything from a telescope to a complicated VR helmet -- is usually not done by a specialist but by a more general optical engineer. This book details the basic design principles and techniques for doing so in a clear, concise, "low-math" way that such generalists will readily understand -- and appreciate. Practical, step-by-step coverage includes succinct equations, simple diagrams, and clear explanations. The chapter on selecting stock lens (to test a concept or to prove out a possible finished device) should be especially useful.