Abstract: An effective nonlinear optical coefficient optimization method for langasite group solid solution crystals is disclosed. The langasite group crystal A3BC3D2O14 mainly includes langanite (LGN) crystal, langatate (LGT) crystal and langasite (LGS) crystal. The solid solution crystals are formed by adjusting a component proportion of langasite group crystals with the same structure, so that different ions mix and occupy sites in a polyhedral group, and a polyhedral lattice structure, distortion degree, refractive index and refractive dispersion of the solid solution crystal are changed. The reduction of the phase matching angle and the improvement of the nonlinear optical coefficient are realized, and the effective nonlinear optical coefficient is finally optimized.

Abstract: The present invention relates to a bed extender for extending and enlarging the carrying capacity of the bed of a pickup truck and some SUV pick-up style vehicles. The extender comprises of a tailgate containing two lateral side panels and a foldable bottom panel. The tailgate is pivotally attached on a U-shape frame which is fixed on supporting beams. The supporting beams are connected to the vehicles main beams underneath the vehicle bed through brackets and can horizontally move out and move in when needed.