Lecture 3: Image Formation with Lenses

This video is part of a series from Laser-Tec that introduces learners to geometrical optics. In the video, image formation with lenses is explored. Viewers learn about the difference between thick and thin lenses, the shapes of three converging (positive) thin lenses and three diverging (negative) thin lenses, the f-number and numerical aperture for a lens and how they control image brightness, ray-tracing techniques to locate images formed by thin lenses, the relationship between collimated light and the focal points of thin lenses, the lensmaker equation to determine the focal length of a thin lens, and thin lens equations for simple lenses. Sign convention, magnification, and beam expanding collimators are also highlighted. The video recording runs 51:11 minutes in length.