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.
|Series||Proceedings of SPIE|
|Conference||Optical Systems Design 2005|
|Period||12/09/05 → 16/09/05|