OPTI 200 Lecture Notes - Lecture 11: Heiligenschein, Dioptre

• School: University of Arizona
• Department: Optical Sciences
• Course: OPTI 200
• Professor: ALL

Document Summary

Lenses arise by combing a converging and diverging surface. All paraxial incident rays parallel to the axis will intersect causing a second focal point. These lenses are converging or focusing lenses. Rays of light will be brought to a focus at the second focal point. All rays originating at the first focal point and passing through the lens will e,erge parallel to the axis. A drop of water makes a good converging lens. Heiligenschein -- only retroreflected light able to be seen is right in front of observer. For thin lenses, the distance from the first focal point to the second is called the -- focal length. Any ray passing through the center of the lens will continue straight without being bent. Ray 1 rule -- a ray parallel to the axis is deflected trhough the second focal point. Ray 2 rule -- a ray through the center of lens is undeviated.