DOUCMENT COMPRISING A SECURITY ELEMENT, READING APPLIANCE AND METHOD FOR READING A SECURITY ELEMENT

摘要

The invention relates to a document comprising a security element (102) and an optical element (108). The security element is arranged in front of the optical element, and the optical element for checking the security element can be switched between at least first and second optical states. The security element can be optically checked in only one of the first and second states.