| 摘要 |
PCT No. PCT/EP92/01141 Sec. 371 Date Mar. 24, 1993 Sec. 102(e) Date Mar. 24, 1993 PCT Filed May 21, 1992 PCT Pub. No. WO92/21099 PCT Pub. Date Nov. 26, 1992.The invention relates to an optical sensor system, in particular for detecting diffuse low-intensity radiation as occurs in testing bank notes provided with luminescent features. In a preferred embodiment the sensor system comprises a flared optical fiber pipe and a processing optical system, whereby the narrow cross-sectional end of the fiber pipe can be used to detect the radiation from the test object at a large solid angle. Due to the change in cross section this radiation emerges from the fiber pipe at a much smaller angle that is coordinated with the aperture angle of the succeeding optical system. |
