Droplets drying device and image forming apparatus

A droplets drying device comprising:

• a drying mechanism having a plurality of light sources that are arranged in a width direction of a recording medium, and dry droplets ejected onto the recording medium by emitting light toward the droplets;
• a moving mechanism that moves the drying mechanism in the width direction;
• a light shield member that is opposed to at least part of the drying mechanism being moved by the moving mechanism, and interrupts light emitted from the light sources disposed in the part, opposed to the light shield member, of the drying mechanism, the light shield member having a box-like shape including a bottom plate, four side plates, and a top opening;
• and
• a measuring member that is disposed in a light shield region where the light shield member interrupts incoming light, the light shield region being surrounded by the side plates of the light shield member when viewed from above, and the measuring member receiving light emitted from each of the light sources and measuring a light quantity of the light source as the measuring member is moved relative to the drying mechanism in the width direction.