Fresnel lenses to show.
6A65.70 • E+30+25
Fresnel lenses to show. There are many examples of Fresnel lenses that can be shown to the class. One is a plastic Highway Blinker light (diverging lens), which works with a 6 volt battery. One is a glass Fresnel converging lens (f.l. 1.5"), possibly from an old traffic light. One is a flat plastic diverging lens (f.l. -5") mounted on a wood frame; everything looks smaller when viewed through it. One is a flat plastic converging lens from an overhead projector (f.l. +10"). There are several other examples not shown above.
Related Demos
E+30+5 Air, glass and water lenses in water tank with arc lamp. E+30+10 Blackboard optics: Light sources with lucite lenses. E+30+15 Real images: Lighted arrow image and various lenses. E+30+17 Real images: Lighted ‘F-object’ and an astygmatic lens. E+30+18 Real images: Lighted ‘F-object’ and a cylindrical lens. E+30+20 Cylindrical lens of lucite with words "DIOXIDE GLASS". E+30+30 Large lens shows chromatic aberration on screen using arc lamp. E+30+35 Pincushion and barrel distortion of lenses using arc lamp. E+30+40 Cylindrical aberration: Wooden model. E+30+45 Astronomical telescope: Using objective and eyepiece lenses. E+30+50 Galilean telescope: similar to E+30+45. E+30+55 Compound microscope is assembled from lenses. E+30+60 Lantern slide projector with removable housing. E+30+65 Model of the eye, with near/far sight lenses, using arc lamp. E+30+70 Applet: Geometric Optics E+30+75 Applet: Thin Lens E+30+80 Applet: Two thin lenses E+30+85 Applet: Spherical Thin Lens in Gauss' Condition E+30+90 Applet: Auto-colimation Method E+30+95 Applet: Bessel Method E+30+100 Applet: Badal Method E+30+105 Applet: Vision Corrections E+30+110 Applet: Setting the reticulated bezel E+30+115 Applet: Astronomical Telescope E+30+120 Applet: Galileo's Telescope E+30+125 Applet: The Microscope