The CD lens for optical engineering

Wei Lee*, P. O.Chun Lin, Chun Kai Tseng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish
Pages (from-to)876-881
Number of pages6
JournalInternational Journal of Engineering Education
Issue number4
StatePublished - 4 Sep 2006

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