Application Possibility of a semiconductor blue laser to Dental Light Activation Unit

蓝光半导体激光器的照射对树脂复合材料的固化是有效的。另一方面，激光束作为光固化机的光源，也具有同样显著的特性，激光束不受距离衰减的影响。将激光束从0度、10度、20度、30度的角度照射到两种不同形状的光导（直光导和锥形光导）上，然后测量从光导出射的光束的角度。当两个异形光波导的入射光夹角为0°时，由于出射光夹角为0°，光强随距离的增加而降低的现象可能会减少，如果开发出比现有光源更强的光源，半导体激光器作为光源是有可能的。

The illuminance from blue semiconductor laser is effective to cure of resin conposite. But, the intensity of it slightly low for clinical use.The other hand, laser beams have same remarkable specific characters for light source of light curing unit.Laser beams were hard to be affected by decrement by distance. This characteristic can become an advantageous point.Laser beams were irradiated to two differently shaped light guides (Straight light guide and Tapered light guide) from angles of 0, 10, 20, 30 degrees then the angles of exit beam from light guides were measured., When the angle of entrance beam is 0° for two shaped light guides, decreases in light intensity with increased distance is maybe reduced, because the angle of exit beam is 0°.If a strong source of light is developed than a current light source, semiconductor laser as a source of light is possible in the future.