| 摘要 |
PURPOSE: A sensor for an optical mouse is provided to prevent a stopping by rendering a picture to be precisely focussed on a light receiving sensor by using a plurality of lenses having different focal length to each other. CONSTITUTION: An optical mouse (20) includes a plate (21) formed at a lower side, a PCB (22) fixed on the upper surface of the plate (21), light receiving sensors (23)(24) attached on the PCB (22) and a cover (27) having a plurality of lenses (25)(26). The light receiving sensors (23)(24) are formed on a PCB (22) by the same number as that of lenses (25)(26) to sense a light reflected through them. The lenses (25)(26) fixed on the cover (27) are provided to have a different focus length to each other so as to lengthen the depth of focus. Since the optical mouse has a long operated focus length, it is not necessary to excessively process a precision of a structure of a mouse. |
