Abstract: The present invention provides a banknote scope that is comprised of a lightproof cartridge and a circuit control-detecting device, wherein a light-emitting component of said detecting device is set upon the inside of the lightproof cartridge; said lightproof cartridge has a gap-detecting channel so that the light ray emitted from the detecting device exactly shines on the detecting channel via a detecting window; for observing, the lightproof cartridge has a sight-glass coordinating to the detecting window oppositely. This banknote scope can reduce the radiation of static electric to the human body, and to avoid the user unexpectedly inserting fingers into the detecting window, therefore the operation of it is very safe, and it has a cramped construction, small volume for facilitating carryover and operation.

Abstract: The present invention provides a banknote scope that is comprised of a lightproof cartridge and a circuit control-detecting device, wherein a light-emitting component of said detecting device is set upon the inside of the lightproof cartridge; said lightproof cartridge has a gap-detecting channel so that the light ray emitted from the detecting device exactly shines on the detecting channel via a detecting window; for observing, the lightproof cartridge has a sight-glass coordinating to the detecting window oppositely. This banknote scope can reduce the radiation of static electric to the human body, and to avoid the user unexpectedly inserting fingers into the detecting window, therefore the operation of it is very safety, and it has a cramped construction, small volume for facilitating carryover and operation.