| 摘要 |
<p>A device for identifying a coded key or the like. A coded key member is inserted into a housing. A Moire interference pattern is produced by a first screen positioned on the key to be moved into registry with a second screen mounted in the housing. The first screen forms non-readable coded information and the second screen forms a code-key. Decoded information produced by the Moire interference pattern is opto-electrically read and a corresponding electrical signal is generated.</p> |
