| 摘要 |
<p>An optical navigation device <Bold>(100),</Bold> such as an optical navigation joystick or mouse, includes an internal redirector <Bold>(452, 654, 756, 1058, 1164)</Bold> which may be separate or formed from material of a touch surface (216) of the optical device. The redirector <Bold>(452, 654, 756, 1058, 1164)</Bold> is disposed at an angle with respect to a plane of the touch surface <Bold>(216),</Bold> operative to reflect light which would otherwise strike the touch surface <Bold>(216)</Bold> at a low angle and be internally reflected. The light may be reflected in a direction away a light sensor <Bold>(214)</Bold> of the device, reducing sensed internally reflected light, or may be reflected into the touch surface <Bold>(216)</Bold> at a higher angle, potentially increasing a quantity of good signal. The redirector <Bold>(452, 654, 756, 1058, 1164)</Bold> may also include portions which block light directly emitted from a light emitter <Bold>(212),</Bold> or reflected off other surfaces of the navigation device.</p> |
