A method of maintaining desirable optical performance of optical emitters over temperature variations is disclosed. The common electrode has a plurality of first cutouts, the passivation layer has a plurality of second cutouts, and the first cutout and the second cutout have substantially the same planar shape. The opposing member includes a handle and a knife-like wedge along which a protruding wedge is slidable. Such a windshield has a very small amount of double imaging even when it is fitted into the vehicle so as to be close to the horizontal.