A system and method to respond to detection of blurry regions of interest in an image are disclosed. The toothbrush has bristles and a reservoir containing mouthwash. A connector housing accommodates the first connector and has an insertion part into which the optical module is inserted. One of these characteristics is the illumination time of the emitter. The invention also relates to a corresponding quadrature coil system. The facet roll-off D occurred at a ridge of a cleavage surface 4 of the single crystal wafer 5 for semiconductor laser to be equal to or less than 40 \u03bcm.