| 摘要 |
PROBLEM TO BE SOLVED: To perform precise authenticity determination function of valuable paper in an optical line sensor device for detecting a fluorescence component of valuable paper and the like by using an ultraviolet light source.SOLUTION: An optical line sensor device includes: an ultraviolet light LED light source 22 for emitting ultraviolet light; a first filter 28 attached to an emission side of the ultraviolet light LED light source 22 and for transmitting the ultraviolet light and cutting visible light wavelength; a sensor unit 24 in which light receiving elements for receiving light emitted from the ultraviolet light LED light source 22 to a medium and reflected from the medium are arranged; and a signal processing unit 33 for processing an optical detection signal of the sensor unit 24. To an optical path between the medium and the sensor unit 24, a second filter 30 for cutting ultraviolet light wavelength is attached. The first filter 28 has a property of cutting ultraviolet light and visible light having a wavelength of 385 nm or more, and the second filter 30 has a property of cutting visible light and ultraviolet light of a wavelength of 410 nm or less. |
