Abstract: A non-linear optical crystal of a compound having the general formula DxM1?xTOZO4, including isomorphs thereof, where: D is a dopant which comprises one or both of Rb and Cs; M is selected from one or both of K and Ag; T comprises one or more of Ti, Sn and Ge, optionally together with one or both of Nb and Ta; Z is selected from one or both of P and As, optionally together with one or both of Ge and Si; and 0<x?0.1.

Abstract: A non-linear optical crystal of a compound having the general formula DxM1-xTOZO4, including isomorphs thereof, where: D is a dopant which comprises one or both of Rb and Cs; M is selected from one or both of K and Ag; T comprises one or more of Ti, Sn and Ge, optionally together with one or both of Nb and Ta; Z is selected from one or both of P and As, optionally together with one or both of Ge and Si; and 0<x≦0.1.

Abstract: A windshield repair apparatus is provided which includes a bridge having a base member including an injection holder and a pivot support member pivotally connected to the base member. A suction cup is disposed for connection with the pivot support member for mounting the bridge to the windshield. A yoke extends upward from the suction cup to pivotally connect the suction cup to the pivot support member of the bridge. The yoke includes at least two side members which are adapted to receive the pivot support member of the bridge therebetween such that the bridge is permitted to pivot vertically about a pivot axis toward and away from the windshield and wherein the side members of the yoke prevent the pivot support member from rotating in a horizontal orientation substantially parallel to the windshield.

Abstract: The invention is a plunger useful in extruding or dispensing viscous material which comprises a thin disc of a material which is capable of deforming when subjected to back pressure during use. The edge of the disc has a circular shape and a cylindrical lip attached to the edge of the disc, which lip is disposed perpendicular to the edge of the disc. The disc has a face and a back surface located on opposite sides of the sheet. The disc also has a symmetrical convex portion which protrudes beyond the plane defined by the edge of the disc in the direction of the face and the peak of the convex portion disposed in the center of the disc. The disc further comprises a symmetrical concave portion which protrudes beyond the plane defined by the edge of the disc in the direction of the back surface. The concave portion of the disc surrounds the convex portion of the disc and the convex portion starts at the bottom of the concave portion.