Patent ID: 6741234
Filing Date: 2004-05-25
Classification: G06F

Abstract:
An optical mouse adapted for use on transparent and non-transparent surfaces, said optical mouse comprising:a light source for emitting light; an irradiating lens for irradiating the light emitted from the light source to a surface; a light-receiving lens positioned to condense light irregularly reflected from a non-transparent surface when the mouse travels on said non-transparent surface; a total reflection prism for allowing the light emitted from the light source and irradiated through the irradiating lens to be located on a path where the light is totally reflected from the non-transparent surface after the light has been transmitted through a transparent material on which the mouse travels, the totally reflected light passing from the non-transparent surface through the transparent material to the total reflecting prism, said total reflecting prism having a light reflecting surface to reflect the light reflected by the non-transparent surface to the light receiving lens, and an optical sensor for sensing the light condensed through the light-receiving lens whether reflected directly from the non-transparent surface or reflected by the total reflection prism, whereby the optical sensor can determine position of the optical mouse when the mouse travels on either said transparent or non-transparent surface.