Abstract: A light irradiator includes a light source and its drive, a heat-dissipating member, and a rectangular housing with vents and a light-emission opening. The housing includes a first surface having a first side with a first dimension and a second side with a second dimension, a second surface having the second side and a third side with a third dimension, and a third surface having the first and third sides. The light-emission opening is in the first surface. First and second vents are in the second surface, with the first vent nearer the opening than the second vent, and the second vent opposite to the opening. An axial fan and a first plate are at the second vent. The first plate faces the axial fan with a spacing less than or equal to the first dimension between them. A second plate outside the housing separates the first and second vents.

Abstract: A light irradiator includes a housing having vents and a light-emission opening. The housing has a first surface having a first side with a first dimension and a second side with a second dimension, a second surface having the second side and a third side with a third dimension, and a third surface having the first side and the third side. The housing includes the light-emission opening in the first surface, and a first vent and a second vent in the second surface. The first vent is nearer the light-emission opening than the second vent. The second vent is opposite to the light-emission opening. The light irradiator includes an axial fan at the second vent that has a fan size greater than the first dimension and less than the second dimension, and a plate that faces the axial fan with a spacing with the first dimension or less.

Abstract: A light irradiator includes a light source and its drive, a heat-dissipating member, and a rectangular housing with vents and a light-emission opening. The housing includes a first surface having a first side with a first dimension and a second side with a second dimension, a second surface having the second side and a third side with a third dimension, and a third surface having the first and third sides. The light-emission opening is in the first surface. First and second vents are in the second surface, with the first vent nearer the opening than the second vent, and the second vent opposite to the opening. An axial fan and a first plate are at the second vent. The first plate faces the axial fan with a spacing less than or equal to the first dimension between them. A second plate outside the housing separates the first and second vents.

Abstract: A light irradiator includes a housing having vents and a light-emission opening. The housing has a first surface having a first side with a first dimension and a second side with a second dimension, a second surface having the second side and a third side with a third dimension, and a third surface having the first side and the third side. The housing includes the light-emission opening in the first surface, and a first vent and a second vent in the second surface. The first vent is nearer the light-emission opening than the second vent. The second vent is opposite to the light-emission opening. The light irradiator includes an axial fan at the second vent that has a fan size greater than the first dimension and less than the second dimension, and a plate that faces the axial fan with a spacing with the first dimension or less.