Abstract: A lock module includes a transmitting module to continuously transmit multiple colored light rays, a key adapted to be inserted into the keyhole of the lock and having multiple colored optical lenses each permitting a specific colored light ray to pass therethrough and a receiving module to receive, store and compare the colored light rays from the multiple colored optical lenses to identify whether the key inserted into the keyhole is accurate. After an initial process of storing the sequence of the colored light rays by the receiving module, the receiving module is able to use stored information to compare the colored light rays subsequently passing through the colored optical lenses of another key to check whether the subsequent key is the accurate key.

Abstract: A lock module includes a transmitting module to continuously transmit multiple colored light rays, a key adapted to be inserted into the keyhole of the lock and having multiple colored optical lenses each permitting a specific colored light ray to pass therethrough and a receiving module to receive, store and compare the colored light rays from the multiple colored optical lenses to identify whether the key inserted into the keyhole is accurate. After an initial process of storing the sequence of the colored light rays by the receiving module, the receiving module is able to use stored information to compare the colored light rays subsequently passing through the colored optical lenses of another key to check whether the subsequent key is the accurate key.