Bill discriminating apparatus

A bill discriminating apparatus for discriminating genuine bills from counterfeit bills by irradiation of ultraviolet rays, said genuine bills having a printed zone containing a light emitting substance having patterns, said apparatus comprising:

• an ultraviolet ray-emitting member for emitting an ultraviolet ray and directing it toward a bill to be discriminated,
• an ultraviolet ray transmitting filter disposed between the ultraviolet ray emitting member and the bill to be discriminated for passing only the ultraviolet ray through the filter,
• a visible ray transmitting filter for passing only the visible ray reflected from said light emitting substance in said printed zone of the bill when the light emitting substance is irradiated with ultraviolet radiation,
• a photoelectric converter element for receiving the visible ray passed through the visible ray transmitting filter and for converting the visible ray into electric signals,
• a slit disposed between the photoelectric converter element and the visible ray transmitting filter for limiting the visible ray passed through the visible ray transmitting filter, and
• a discriminating circuit for checking said patterns of the light-emitting substance in response to the electric signals of said photoelectric converter element;
• wherein said discriminating circuit comprises a first circuit for generating pattern signals from light rays received in said photoelectric converter element, a second circuit for generating a train of pulses corresponding to the pattern signals obtained from a genuine bill, and a third circuit for comparing said pattern signals with said train of pulses.