| 摘要 |
An optical sensing device for detecting plural optical features of valuable papers is provided that comprises first and second photocouplers (5) and (6) or (9) and (10) positioned in the vicinity of and on the opposite sides of a passageway (13) for guiding the valuable paper (64). Each of first and second photocouplers (5) and (6) or (9) and (10) has a light emitting element (20), (22), (30), (32) for emitting a light, and a light receiving element (21), (23), (31), (33) for selectively receiving the light from the light emitting element (20) so that each light receiving element (21), (23), (31), (33) can receive lights reflected on and penetrating the valuable paper (64) for detection of multiple optical features from the valuable paper (64). Thus, the optical sensing device can derive plural optical scanning patterns by means of less number of light emitting and receiving elements to improve accuracy in valuable paper validation; can pick out optical patterns for different colors printed on valuable paper by means of plural lights of different wavelength irradiated on a same scan line or area on valuable paper; and can utilize inexpensive light emitting and receiving elements to reduce cost for manufacture.
|
