Abstract:
A positioning unit is provided for a computer housing-and-peripheral device assembly that includes a computer housing and a peripheral device. The positioning unit includes a positioning member disposed between the peripheral device and the computer housing, and including a thin plate that is stamped to form a bent spring arm having a first section which extends toward the casing, and a second section which bends from the first section and which extends toward the computer housing.
Abstract:
A freeform surface included collimation lens is provided, which is designed through a freeform surface design process to provide an integrally-formed unitary structure. The design method includes a step of identifying an optic field pattern of light source, a step of performing graphic analysis of freeform surface tangential vector formula, a step of acquiring freeform surface control point, a step of constructing a three-dimensional model, and a step of performing geometric processing. Through these steps, tangential vectors of control points of each freeform surface are determined and an approximating process or an exact solution process is adopted to determine the coordinates of the points of the freeform surface. Three-dimensional modeling software is then employing to construct an ellipsoid collimation lens, which realizes an optic collimation performance of at least 88% when tested with a circular disk set at a distance of 200 meters and having a diameter of 35 meters.