Abstract: Disclosed is a security document (11) having at least one paper ply (4) that is covered on both sides with a transparent plastic layer (2, 13). Disclosed is also a jacket made of transparent synthetic material, which can be used to produce said security document (11). Substantial increase in security, particularly in the production and issuance of said security document (11), can be <achieved due to the fact that the paper ply (4) is a security paper with at least one security characteristic (5, 8, 10, 15, 16) and the plastic layers (2, 13) are a sleeve made of thermoplastic material that is molten into a transparent sleeve (13) by applying only high pressure and/or temperature, wherein an edge area (14) is available at least in certain segments, in which the plastic layers (2, 13) are directly adjacent to one another and wherein at least one of the plastic layers has at least one security characteristic (3, 7).

Abstract: The invention relates to a device (20) for making security elements visible, which are provided in an object (8) and have at least one photoluminescent segment that is characterized by having a linearly polarized absorption. The aim of the invention is to obtain a device of this type that has a particularly simple and compact design. To this end, at least one UV light source, which is provided in the form of a UV diode (18), and at least one polarization filter (4) are arranged so that the light of the light source (18) is linearly polarized (12) by the polarization filter (4) and, in a dark space (17), strikes the object (8) with respect to the photoluminescent segments provided therein, and photoluminescent light (16) in the visible range emitted by the segment can be observed through an observation opening (10).

Abstract: The invention relates to a device (20) and a method for making visible security elements present in an object (4) and comprising at least one photoluminescent segment which is characterized by linearly polarized photoluminescence and/or linearly polarized absorption. According to the invention, a good contrast is achieved with few interfering signals, by arranging at least one light source (1) and at least one polarization filter (2) in such a way that the light (24) from the light source (1) is linearly polarized (23) by means of the polarization filter (2) and hits the object (4) or the photoluminescent segments in said object, and photoluminescent light (25) from the segments can be observed through another and/or the same polarization filter (2).