Add-on laser reading device for a camera phone

Jukka-Tapani Mäkinen, Karri Niemelä, Hannu Vasama, Rauno Mattila, Mika Aikio, Sanna Aikio, Janne Aikio

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


A novel add-on device to a mobile camera phone has been developed. The prototype system contains both laser and LED illumination as well as imaging optics. Main idea behind the device is to have a small printable diffractive ROM (Read Only Memory) element, which can be read by illuminating it with a laser-beam and recording the resulting datamatrix pattern with a camera phone. The element contains information in the same manner as a traditional bar-code, but due to the 2D-pattern and diffractive nature of the tag, a much larger amount of information can be packed on a smaller area. Optical and mechanical designs of the prototype device have been made in such a way that the system can be used in three different modes: as a laser reader, as a telescope and as a microscope.
Original languageEnglish
Title of host publicationProceedings Volume 5962, Optical Design and Engineering II
PublisherInternational Society for Optics and Photonics SPIE
Publication statusPublished - 2005
MoE publication typeA4 Article in a conference publication
EventOptical Systems Design 2005 - Jena, Germany
Duration: 12 Sep 200516 Sep 2005

Publication series

SeriesProceedings of SPIE


ConferenceOptical Systems Design 2005

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