Patent ID: 9046939
Filing Date: 2015-06-02
Classification: G02B,G06F,H04N

Abstract:
1. An optical navigation device that is operable to move a cursor based on movement of an object, the device comprising: a substrate including a first surface; a light source mounted on the first surface of the substrate; a curved reflector positioned above a top surface of the light source to gather and reflect light from the light source in a first direction; an object surface located in the first direction from the reflector, the object surface being transparent to the light from the light source and through which the light reflected by the reflector is directed and which can be reflected back through the object surface by an object located above the object surface; a lens located below the object surface to gather and direct light passing back through the object surface after being reflected off of the object, the light being directed in a second direction; a multi-pixel image sensor mounted on the first surface of the substrate and located in the second direction from the lens to receive light reflected off of the object and directed by the lens; an inner housing mounted on the first surface of the substrate and surrounding the image sensor, the inner housing allowing light to pass from outside of the inner housing to the image sensor only through the lens; and an outer housing mounted on the first surface of the substrate; and wherein the curved reflector has the shape of a portion of a non-spherical ellipsoid; the light source is located at one of the foci of the ellipsoid; and the curved reflector is positioned such that the other one of the foci of the ellipsoid is located in the vicinity of an upper surface of the object surface.