LUMINAIRE, IMAGE SENSOR UNIT AND PAPER SHEET IDENTIFICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To unify illumination distribution of light with wavelength of a high absorption factor of a light guide body.SOLUTION: A luminaire 1 includes: a light source 11 for emitting light of a plurality of wavelengths; and a rod-like light guide body 12 which makes light which the light source 11 emits linear. The light guide body 12 is composed of a material having a region whose transmission factor to the wavelength is not constant. The light source 11 is arranged at one end of the light guide body 12 in a longitudinal direction and it includes a wavelength of the region in which the transmission factor of the light guide body 12 is not constant. A reflection face 123 having reflection means in which a difference is made in reflectance ratios to light of the plurality of wavelengths is formed at the other end of the light guide body 12 in the longitudinal direction.