Patent ID: 8188988

Claim:
A finger navigation device comprising: a substrate; first, second, and third walls that extend from the substrate to define a first chamber and a second chamber; a light source located on the substrate in the first chamber; a photosensor located on the substrate in the second chamber; a top cover located above the light source and the photosensor, the top cover having a first side and a second side, wherein the first side faces the substrate and the second side faces away from the substrate, and wherein the top cover encloses the first chamber and the second chamber; a first lens located in the top cover proximate the light source and a second lens located in the top cover proximate the photosensor; and a second cover facing the second side of the top cover, the second cover having a first surface facing the top cover, a second surface opposite the first surface, and a transparent portion through which light can pass to a user; wherein the first lens of the top cover is configured to bend light emitted from the light source towards the transparent portion of the second cover.