Compact disks as a device for the teaching of optics have uses other than traditional diffraction experiments. Like a Fresnel zone plate that can focus light and form images of distant objects, the circular grating-like structure of a compact disk (CD) renders itself a chromatic lens. This paper suggests an interesting experimental activity that can be easily reproduced for early physics classes. The optical converging nature and chromatic characteristics of focal lengths of the CD lens are experimentally presented and theoretically interpreted.
|Number of pages||6|
|Journal||International Journal of Engineering Education|
|State||Published - 4 Sep 2006|