| 摘要 |
An optical mouse 100 wherein the light source 106 is reflected off an optical pattern pad and is placed such that a lens 120 at a predetermined distance from the optical pad focuses the light directly onto an inverted integrated circuit 124 mounted on and through a hole 126 in a printed wiring board 118, said integratedcircuit being housed in a clear plastic package. The path from the lens to the integrated circuit package provides an optical guide 122 such that the distancesfrom the pattern pad to the lens, and from the lens to the optical sensor 128 in the integrated circuit, is fixed upon manufacture and assembly without any further optical adjustment. The inverted state of the integrated circuit chip allows a fixed distance to be provided through the hole in the printed wiring board rather thanfrom above it as is common in the prior art. |
