I actually purchased this book AFTER I had been an optical engineer for 15 years because my other two calculus books were, how you say, not so good for re-learning (or learning in the first place, for that matter). Thompson explains everything clearly, giving you the details you need to understand the subject matter. Honestly, it's the only book you'll need as an introduction to calculus. Covers limits, derivatives, integrals, etc., and provides a lot of tricks to use to simplify various problems. Includes exercises with answers to the odd-numbered questions, which is certainly helpful to the learning process.
Highly recommended. Higher-level math was never my strong suit in college, so if you want to learn calculus, this book is likely to be your best bet.