PROBLEM TO BE SOLVED: To provide an ultraviolet light irradiation device capable of efficiently irradiating ultraviolet light to an irradiation object.SOLUTION: An ultraviolet light irradiation device 10 comprises: a light source part 20 including at least one ultraviolet line LED； a driving part 30 that supplies a driving current to the ultraviolet line LED； and a control part 60 that controls an operation of the driving part 30. The control part 60 calculates a driving current value of the ultraviolet line LED on the basis of information indicating a spectroscopy intensity characteristic of the ultraviolet line LED and information indicating a spectroscopy action characteristic of an irradiation object as a light irradiation target of the light source. The driving part 30 supplies the driving current of a value calculated by the control part 60 to the ultraviolet line LED.SELECTED DRAWING: Figure 1【課題】照射対象に対して効率的に紫外光を照射できる紫外光照射装置を提供する。【解決手段】紫外光照射装置１０は、少なくとも一つの紫外線ＬＥＤを含む光源部２０と、紫外線ＬＥＤに駆動電流を供給する駆動部３０と、駆動部３０の動作を制御する制御部６０と、を備える。制御部６０は、紫外線ＬＥＤの分光強度特性を示す情報と、光源部による光照射の対象となる照射対象の分光作用特性を示す情報とに基づいて、紫外線ＬＥＤの駆動電流値を算出し、駆動部３０は、制御部６０が算出した値の駆動電流を紫外線ＬＥＤに供給する。【選択図】図１
