Abstract: A wire grid polarizer comprising a transparent substrate having a first surface. Multiple separate and discrete sections of wire grids can be disposed over the first surface and attached to the substrate, with a border between the sections including an opaque mask material. The mask material can be disposed over the first surface of the substrate. The mask material can be a material different than the wire grid material. The mask material can extend over or under a portion of an edge of the wire grid.

Abstract: A wire grid polarizer comprising a transparent substrate having a first surface. Multiple separate and discrete sections of wire grids can be disposed over the first surface and attached to the substrate, with a border between the sections including an opaque mask material. The mask material can be disposed over the first surface of the substrate. The mask material can be a material different than the wire grid material. The mask material can extend over or under a portion of an edge of the wire grid.

Abstract: The disclosed invention is a means of physical training in the area of developing explosive leg power and improving hand to eye coordination. The invention is comprised of a tethered ball or other object which is attached to a tether, the tether being mounted to a supportive structure. The object can, in some variations, be adjusted according to various heights or distance away from the supportive structure. The user typically jumps up and interacts with the object (ball) to perform a variety of skill functions such as basketball "tip-ins" or "rebounds". The tether limits the displacement of the object from the supportive member, which in the case of basketball would likely be a basketball goal. Many times the tether includes an elastic component that stores energy when the object is displaced by the user.