| 摘要 |
PURPOSE: A pen-shaped computer input device with a metal pen nibs is provided to enable a user to operate a pen-shaped optical mouse like a feeling using a general pen by keeping the same sensitivity for moving a cursor on a monitor or writing characters, as the sensitivity gets to be the best state. CONSTITUTION: An optical module includes a light source(110) and a condensing lens(150). To make a center part of a beam image formed by being irradiated from the light source to a bottom(104) correctly reached to an optical sensor array(131) by reflecting from the bottom and passing the condensing lens, the light source is designed to have an incident angle(107) of a predetermined angle. The condensing lens is arranged to a light axis(153) of the same angle as a reflection angle(106) of a beam reflected on the bottom from the light source. |
