| 摘要 |
An identification system utilizing an identification card which has thereon identifying indicia which is invisible under normal, visible light. The card or other article of identification includes a portion formed with an opening receiving a sheet on which identifying indicia is located, and this identifying indicia includes at least a portrait of the individual who is authorized to use the identification article. The sheet can also carry a signature of this individual, and the nature of the indicia is such that it can be rendered visible by making use of light beyond the visible spectrum, such as ultraviolet light or infrared light, with a suitable filter being located over the sheet with the indicia thereon so as to permit only the desired light to reach the indicia.
|
