Self-contained device for recording data encoded either in visible or invisible form

摘要

A self-contained device for recording data encoded either in visible or invisible form or both on a medium, and for playback of data encoded either in visible or invisible form or both on the medium, the device comprises a case for forming a self-contained housing for the device; a recording portion for recording either or both visible and invisible ink on the medium, or recording either or both visible and invisible dye; and a detecting portion for detecting either or both visible and invisible ink, or detecting either or both visible and invisible dye.