The invention pertains in a first aspect to a multilayer film that includes a frangible holographic image layer and an adhesive layer adjacent to a side of the holographic image layer; and, an additional temporary support layer that is adjacent a side of the holographic image layer that is opposite the adhesive layer, and provides integrity to the multilayer film. The additional temporary support layer can be a polyester film that is removable from the multilayer film at 10 gram per inch peel strength; or, can be a heat-shrinkable film that is removable from the multilayer film with the application of heat. After application of the multilayer film to a substrate, the holographic image layer forms an exterior surface of the multilayer film. In a second aspect, the invention pertains to an authentication label of the multilayer film for attachment to a substrate, wherein a side of the adhesive layer that is opposite the holographic image layer contacts the substrate, and the holographic image layer forms an exterior surface of the label.

Provided are diffraction structure transfer foil that further improves usefulness of the diffraction structure transfer foil in authenticity determination by allowing a greater variety of diffracted-light patterns to be observed, and a forgery prevention medium using the diffraction structure transfer foil. The diffraction structure transfer foil (21) includes a transfer foil substrate (1), a peeling-off protective layer (2) that is laminated on one surface of the transfer foil substrate (1), a laminated body for diffracted-light delivery (13a) that is laminated on the peeling-off protective layer (2), and an adhesive layer (9) that is laminated on the laminated body for diffracted-light delivery (13a). The laminated body for diffracted-light delivery (13a) includes a diffraction structure forming body in which a plurality of diffraction structures (4 and 7) are formed, and a reflective layer (5a or 8a) that is formed in accordance with each of the plurality of diffraction structures (4 and 7). A transmission density of one reflective layer (5a) of the plurality of reflective layers (5a and 8a) is in a range of 0.01 to 0.9, and a transmission density of the other reflective layer (8a) is 1.0 or greater.

An improved polymeric sheet material for use in making polymeric security documents such as banknotes is provided. The inventive polymeric sheet material has one or more integrated and/or applied optical security devices. Polymeric security documents made using these improved polymeric sheet materials are also provided.

Systems, devices, and methods for spatial multiplexing in holographic optical elements (HOEs) are described. A spatially-multiplexed HOE includes multiple spatially-separated holographic regions and each spatially-separated region applies a respective optical function to light that is incident thereon. An exemplary application as a spatially-multiplexed holographic combiner (SMHC) in a scanning laser-based wearable heads-up display (WHUD) is described. In this exemplary application, a scanning laser projector directs multiple light signals over the area of the SMHC and the SMHC converges the light signals towards multiple spatially-separated exit pupils at or proximate the eye of the user. The particular exit pupil at the eye of the user towards which any particular light signal is converged by the SMHC depends on the particular region of the SMHC upon which the light signal is incident. Such may be useful in engineering particular eyebox and/or user interface display configurations in the operation of the WHUD.

The invention relates to an assembly comprising a substrate and a photopolymer film, which are joined to one another partably at least in sections, the substrate comprising polyethylene terephthalate, and the photopolymer film comprising three-dimensionally crosslinked polyurethane matrix polymers, a writing monomer and a photoinitiator, characterized in that the substrate, after seven-day incubation at 23 C. in a 0.5 volume percent butyl acetate solution of the dye of formula (I) ##STR00001##
has an L value L1 and before the incubation an L value of L0, the L values being determined by CieLAB measurements, and the difference between the L values L1 and L0 satisfying the formula (II)
L1L0>0.25(formula II).

An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.

An optical waveguide device, a display apparatus, and a display device are disclosed. The optical waveguide device includes an optical waveguide dielectric body, a first polarized reflection layer, and an optical structure layer. The optical waveguide dielectric body includes a first surface and a second surface opposite to each other, the first polarized reflection layer is arranged on the first surface, and the optical structure layer is arranged on the second surface. The optical waveguide dielectric body is configured to propagate light, which includes a first polarized light. The first polarized reflection layer is configured to reflect the first polarized light and transmit a second polarized light. The optical structure layer is configured to convert the first polarized light incident at a preset angle into the second polarized light, reflect the second polarized light to the first polarized reflection layer, and reflect the first polarized light incident at another angle to the first polarized reflection layer. An exit region of the second polarized light is no longer limited to a region without a reflective film layer, thereby increasing a light exit range of the optical waveguide device.

The present invention relates to a security document and/or document of value with a hologram in a visually changeable window as a novel security element, and also to a method for producing the same.

An identification medium can be affixed to cloth or leather products by sewing. A cholesteric liquid crystal layer on which an embossed surface for forming a hologram is formed, is sandwiched between a first supporting member and a second supporting member. A mounting region that can be affixed to clothing, etc., by sewing, is formed.

A holographic sealing member for a container comprises a heat actuated sealant or adhesive layer that secures the sealing member to a container, a metal foil sealing layer over and covering and adhesively bonded to the heat actuated sealant or adhesive layer, a holographic layer over and covering and adhesively bonding to the metal foil layer having an upper plastic layer and a lower embossed image layer, and a tab over and covering and adhesively bonded to the upper plastic layer that may be pulled to remove the tab and the plastic layer from a container, thereby exposing the lower embossed image layer which must then be perforated to gain access to the contents of the container.