14 October 2005 Add-on laser reading device for a camera phone
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Abstract
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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jukka-Tapani Mäkinen, Jukka-Tapani Mäkinen, Karri Niemelä, Karri Niemelä, Hannu Vasama, Hannu Vasama, Rauno Mattila, Rauno Mattila, Mika Aikio, Mika Aikio, Sanna Aikio, Sanna Aikio, Janne Aikio, Janne Aikio, "Add-on laser reading device for a camera phone", Proc. SPIE 5962, Optical Design and Engineering II, 596228 (14 October 2005); doi: 10.1117/12.625373; https://doi.org/10.1117/12.625373
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