OPTICAL SENSOR, LIGHT DETECTING DEVICE, PAPER SHEET PROCESSING DEVICE, LIGHT DETECTING METHOD, AND PHOSPHORESCENCE DETECTING DEVICE
FIG9 is a schematic diagram showing the structure of one embodiment of a light detection apparatus according to the present invention
A light detection apparatus mounted with the optical sensor 10 will now be described. FIG9 is a block diagram schematically showing the structure of the light detection apparatus 100. The light detection apparatus 100 is an apparatus used to determine the authenticity of the detection target T attached to an object X to be conveyed. The light detection apparatus 100 includes a conveyor apparatus 80, an optical sensor 10 installed above the conveyor apparatus 80, and a control apparatus 90 that controls the conveyor apparatus 80 and the optical sensor 10. The light detection apparatus 100 can be used as a sheet processing apparatus, treating the object X to be conveyed as a sheet such as a banknote. Note that the light detection apparatus 100 functions as a phosphorescence detection apparatus when detecting phosphorescence as radiation light.
schematic diagram
30
light source
80
conveyor apparatus
92
detection unit
100
detection apparatus
94
determination unit
9
Expression
93
correction unit
20
holder
40
photodetector photodetectors
90
control apparatus
91
conveyor apparatus control unit
53
light incident/emission surface
95
storage unit
10
optical sensor optical sensors
50
light guide
['1. An optical sensor, comprising: a light source that irradiates excitation light; a photodetector that detects radiation light emitted from a detection target excited by the excitation light; and a single light guide unit that guides the excitation light to the detection target and guides the radiation light to the photodetector.', '8. A light detection apparatus, comprising: the optical sensor according to any one of claims 1 to 7; and a correction unit that corrects an intensity of the radiation light detected by the photodetector based on a relative position of the detection target with respect to the photodetector when the radiation light is detected.', '13. A phosphorescence detection apparatus, comprising the optical sensor according to claim 1, wherein: the light source is a light source that irradiates a detection target with the excitation light, the detection target containing a phosphorescent material, the photodetector is a photodetector that detects an intensity of phosphorescence emitted from the detection target, and the phosphorescence detection apparatus further comprises: a detection unit that controls the light source and the photodetector, and detects the intensity at least three times after stop of the irradiation with the excitation light while changing a detection time; and a determination unit that determines whether or not the phosphorescence results from multiple types of phosphorescence having different decay time constants, based on the at least three intensities detected by the detection unit and their detection times.']