UV RADIATION DEVICE INDICATING EFFECTIVE RADIATION AREA

摘要

Disclosed is an ultraviolet light radiating device for displaying an effective radiating area. The ultraviolet light radiating device according to the present invention comprises: an ultraviolet light radiating unit which has at least one ultraviolet light source, and radiates the ultraviolet light towards a stage; and a boundary display unit which displays at least portion in the boundary of the effective radiation area having substantially effective ultraviolet illumination in area in which ultraviolet light is radiated on the stage. The boundary of the effective radiation area can be a virtual line in which the ultraviolet illumination based on the stage surface shows a value selected in the range of 10% or more with respect to a maximum value of the ultraviolet illumination inside the effective radiation area.