| 摘要 |
PCT No. PCT/FR96/01865 Sec. 371 Date Aug. 11, 1999 Sec. 102(e) Date Aug. 11, 1999 PCT Filed Nov. 26, 1996 PCT Pub. No. WO97/21214 PCT Pub. Date Jun. 12, 1997Optical reading device (1) for reading digital data from a reflecting medium (4), comprising a lighting source (8), means (10) for focusing the beam emitted by the source onto an area (S) of the medium, means (R) for receiving the light energy reflected and means (12) for processing the signals delivered by the receiving means. The device (1) comprises at least one second unfocused lighting means (E) installed on or near the reading device (1) so as to use its beam (F) to illuminate the focusing area (S) of the source (8) on the medium (4), the wavelength and the luminous power of this second lighting means (E) being chosen in such a way that the reproduction of the data is improved.
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