公开(公告)号：EP0970404B1

公开(公告)日：2001-01-24

申请号：EP98937440.0

申请日：1998-06-03

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： SCHRECK, Oliver ,  HANKE, Randolf

IPC分类号： G01T1/29 ,  G03B42/00

CPC分类号： G01T1/2014

摘要： The invention relates to a system (10) for reading photo-stimulated accumulative luminescent substances, comprising an excitation glass fibre (12) into which light can be fed by means of a light source (20), said light source (20) exciting the accumulative luminescent substance. A light emitted by the excited accumulative luminescent substance can be fed into a receiving glass fibre (14). An end of the excitation glass fibre (12) which is positioned closely to the accumulative luminescent substance is also situated close to an end of the receiving glass fibre (14) which can be positioned close to the accumulative luminescent substance. Said excitation glass fibre (12) has a first numerical aperture, the receiving glass fibre (14) having a second numerical aperture which is large in comparison to said first numerical aperture. As a result, the light fed out by the excitation glass fibre (12) is directed straight onto the accumulative luminescent substance without an optical system and the light which is stimulated can be captured by the receiving glass fibre (14) without an optical system. A glass fibre drum scanner uses the inventive system to read the luminescent substance two-dimensionally by means of an advancing device which moves the one end of the excitation glass fibre and the receiving glass fibre in one direction, and a rotating drum to which the luminescent substance is attached.