| 摘要 |
<p>A colored based lock (20) and key (10), wherein the key includes a color indication (16) incorporated thereon, and the lock includes a color sensor (24) for identifying the color indication, so as to open the lock. The key also includes a blank or blanks (32) which can be formed of metal, plastic, or any other material, where a plurality of colors or color emitting or color reflecting materials (16) can be incorporated by various methods. The lock includes at least one color sensor (24) arranged to sense the color incorporated on the key or on a predefined sequence of keys when being inserted or put across or rotated in the lock. A decision mechanism (62) is activated by an electric signal generated upon identification (66) of the color incorporated on the key to permit opening of the lock. The color sensor includes a light source (46) for directing light at the color incorporated on the key, a reflected light detector, an evaluation unit for determining frequency and intensity of the reflected light.</p> |
