Optoelectronic reading pen

Claim 1

Optoelectronic reading pen for scanning optically encoded information applied to an information carrier, comprising: means for illuminating the information carrier; and optoelectronic sensor means for receiving light reflected from the information carrier and converting the received light into an electric signal; wherein said illuminating means comprises means for collecting ambient light from the environment and applying the collected light to the information carrier, and ambient light from the environment of the reading pen is exclusively used for illuminating the information carrier; said illuminating means comprising means for concentrating collected ambient light prior to application to the information carrier, comprising an essentially hollow-cylindrical pen housing of an optically transparent material, into which pen housing ambient light can enter from the environment through an outside surface, wherein the ambient light entering the pen housing is conducted further towards a scanning side and is there concentrated, said pen housing comprising an optically dull rear outside surface selected as an outside surface for entry of the light.