DOCUMENT PHOTOSENSOR OF SURFACE-MOUNTED ELEMENTS Russian patent published in 2013 - IPC G07D7/12 G06K9/00 

FIELD: physics.

SUBSTANCE: disclosed is a document photosensor which comprises upper and lower measuring assemblies (1 and 2) lying on opposite sides of a passageway (55) along which a document (50) is transported. The upper measuring assembly (1) comprises an upper substrate (11), an upper light-emitting diode (LED) chip (21) and an upper photodiode chip (37) mounted on the surface of the upper substrate (11). The lower measuring assembly (2) comprises a lower substrate (12), a lower LED chip (31) and a lower photodiode chip (38) mounted on the surface of the lower substrate (12). These chips (21, 37, 31 and 38) are precisely located on the upper and lower substrates (11 and 12) so that the photodiode chips (37 and 38) accurately detect light emitted by the LED chips (21 and 31) and penetrates through a particular point on the document (50), which improves bill validation.

EFFECT: high accuracy of detecting light-emitting elements.

15 cl, 23 dwg