| 摘要 |
A security document or token in the form of an identity card (10) is provided which incorporates a biometric or photographic image (24) provided in a transparent region or window (18) such that the image is substantially distinguishable from both sides of the card (10). Regions of partial or varying opacity (20, 30) are provided adjacent to or surround the window (18). A portion (27) of the photographic image (24) extends into at least one region of partial or varying opacity (20), and another portion (25) of the image extends into the substantially opaque region (22) surrounding the window (18) and the regions (20, 30). The portion (27) of the image which extends into the region of partial or varying opacity is at least partly visible from both sides of the document in transmission, but only visible from one side of the document in reflection. The regions of partial or varying opacity (22) and the photographic image (24) may be applied to a base support or substrate (32) in such a manner that removal of the image (24) from the substrate (32) results in removal or damage of the regions of partial or varying opacity (20, 30). |
