| 摘要 |
PURPOSE: A system for inputting a password by a key and an optical medium is provided to install without depending on the place of the installation since the system does not have a mechanical connection structure. CONSTITUTION: A system for inputting a password by a key and an optical medium includes a main optical path(4), a small hole(5) and a display window(8). If the key system(6) is inserted into the cylinder(7), the key system(6) pushes the start button(1). At this time, the light source(2) emits a light having a color corresponding to the current status of the locking apparatus.
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