We describe a one-semester undergraduate course in optical engineering that has been taught at University of Central Florida since 1985 to junior and senior students of electrical engineering. The choice of topics emphasizes first-order system-engineering calculations, rather than the more traditional theoretical viewpoint often found in junior/senior-level optics courses. Representative topics include: paraxial raytracing, field of view and F/#, diffraction-limited resolution, Fresnel equations, radiometric/photometric units, paraxial flux transfer, blackbody radiation, detector responsivity and sensitivity, shot noise, Johnson noise, and laser-beam propagation. Homework problems emphasize estimation of magnitudes, as well as more exact numerical calculations. We have found this approach to be accessible to typical engineering undergraduates, and to be a good foundation for entry-level practitioners.