Reception housing for a pen (4) with a recording chamber (4) covering the entire length of the pen (3) with a reflecting inner wall (5) and with one or more radiation sources (6) on the inner wall (5),with a lockable opening (17) at the free admission chamber end (3),with an ejector at the fixed end of the receptacle facing the opening (17) and with at least one central element for centering the pen (4) along the median longitudinal axis (13) of the receptacle chamber (3).
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