"Version: 20241101"--Title page verso.Includes bibliographical references.8. Introduction to complex light -- 8.1. Bessel beams -- 8.2. Airy beams -- 8.3. Generation of complex light -- 8.4. Applications9. Everyday optical systems and beyond -- 9.1. Barcode readers -- 9.2. Finger print sensors -- 9.3. Pulse oximeters -- 9.4. Interferometry based measurements -- Appendix A. Using Zemax or OSLO t…