Patent ID: 8822962

Claim:
An ultraviolet irradiator for irradiating a target with ultraviolet light, comprising: a housing having an ultraviolet irradiation port through which the target is irradiated with the ultraviolet light; an ultraviolet lamp that emits ultraviolet light; a water-cooling jacket in which the ultraviolet lamp is mounted; a reflection plate that reflects light emitted from the ultraviolet lamp, the ultraviolet lamp, the water-cooling jacket and the reflection plate being mounted in the housing, and ultraviolet light emitted directly from the ultraviolet lamp and reflection light reflected from the reflection plate being irradiated to the outside of the housing; a heat withdrawing mechanism that withdraws heat of the reflection plate and discharges the heat to the outside of the housing; a heat transfer member that transfers ambient heat in the housing to the heat withdrawing mechanism so that the heat withdrawing mechanism withdraws the ambient heat; and an auxiliary reflection plate that is disposed between the ultraviolet irradiation port of the housing and the ultraviolet lamp to adjust an illumination distribution, reflects light from the ultraviolet lamp and the reflection plate to the ultraviolet irradiation port to generate auxiliary reflection light to be applied to the target, and irradiates the target with uniform light by combining the light from the ultraviolet lamp and the reflection plate with the auxiliary reflection light; and wherein, the ultraviolet irradiation port is closed by a quartz glass window plate.