Abstract:
A system for generating a light beam having a plurality of orthogonal function modes includes a light source for generating a plane wave light beam. A MicroElectroMechanical (MEM) system including an array of micro-mirrors for generating the light beam having the plurality of orthogonal function modes applied thereto responsive to the plane wave light beam and control signals for controlling the array of micro-mirrors. A controller generates the control signals to control a position of each of a plurality of micro-mirrors of the array of micro-mirrors. The controller controls the position of the micro-mirrors to generate a plurality of holograms for applying the plurality of orbital angular momentum modes to the plane wave light beam responsive to the control signals.
Abstract:
According to one aspect a method for manufacturing a holographic storage medium includes providing one or more data masks (122) with data to be recorded, illuminating the one or more data masks onto the medium with a plane wave object beam (116) from a laser light source (110) operating at a record wavelength, propagating a reference beam (114) at an incident angle to the medium (124) to record the one or more data masks on the medium, and altering the incident angle of the reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said medium can be read bit by bit using a laser light source operating in a readout range of wavelengths different from the record wavelength.
Abstract:
A mirror and information image display assembly (300) for a vehicle, a holographic information image display system (300, 106, 104), a vehicle (100) comprising such an assembly, and a method of providing image information to an occupant of a vehicle are disclosed. The assembly has a reflective layer (302) and an image display means (304, 306), for displaying image information to an occupant of the vehicle. The image display means comprises a hologram (304), and a lighting means comprising a light source (306) for illuminating the hologram.
Abstract:
Die vorliegende Erfindung betrifft neue Photopolymer-Formulierung umfassend eine Polyol-Komponente, eine Polyisocyanat-Komponente, ein Schreibmonomer und einen Photoinitiator umfassend einen Farbstoff der Formel (I). Weitere Gegenstände der Erfindung sind ein holographisches Medium, das eine erfindungsgemäße Photopolymer-Formulierung enthält oder unter deren Verwendung erhältlich ist, die Verwendung einer erfindungsgemäßen Photopolymer-Formulierung zur Herstellung holographischer Medien sowie ein Verfahren zur Herstellung eines holographischen Mediums unter Verwendung einer erfindungsgemäßen Photopolymer-Formulierung.
Abstract:
A method of displaying a video image comprises receiving sequential image frames at a processor. Each image frame is processed to obtain a kinoform. A programmable diffractive element such as an SLM represents the sequence of kinoforms allowing reproduction of the image using a suitable illumination beam.
Abstract:
A programmable hologram generator comprises a layered structure of a pixelated VLSI chip (12), a reflective ferroelectric liquid crystal (14) that is physically disposed on the VLSI chip (12), and a photorefractive crystal (10) that is physically disposed on the liquid crystal. The VLSI chip is controlled by a computer (13) wherein holograms are digitally stored. The reflective state of the individual pixel areas of the liquid crystal are controlled or selected by this computer control of the VLSI chip. A desired hologram is written into the photorefractive crystal by a reference beam that illuminates the photorefractive crystal (10), and by an illumination beam (19) that is reflected from the selected pixels of the liquid crystal and thereafter interferes with the reference beam (20). The hologram that is written into the photorefractive crystal is a function of the control of the reflective state of the pixels of the liquid crystal, as this reflective state is in turn controlled by the pixels of the VLSI chip (12).
Abstract:
Die Erfindung betrifft ein Sicherheitselement (1) mit einer ersten Volumenhologrammschicht (11), die ein Koordinatensystem mit den senkrecht zueinander stehenden Koordinatenachsen x und y (3, 4) in einem nicht gebogenen Zustand des Sicherheitselements (1) aufspannt, wobei in die erste Volumenhologrammschicht (11) ein erstes Volumenhologramm in mindestens einem ersten Bereich (51) eingebracht ist, wobei das erste Volumenhologramm derart ausgeformt ist, dass eine erste Information (21-30) in einem ersten vordefinierten gebogenen Zustand des Sicherheitselements (1) für einen Betrachter (7) in einer ersten Betrachtungssituation sichtbar ist und in dem nicht gebogenen Zustand des Sicherheitselements (1) in der ersten Betrachtungssituation nicht sichtbar ist oder umgekehrt.
Abstract:
Systems, devices, and methods for eyebox expansion by exit pupil replication in scanning laser-based wearable heads-up displays ("WHUDs") are described. The WHUDs described herein each include a scanning laser projector ("SLP"), a holographic combiner, and an optical replicator positioned in the optical path therebetween. For each light signal generated by the SLP, the optical replicator receives the light signal and redirects each one of N > 1 instances of the light signal towards the holographic combiner effectively from a respective one of N spatially-separated virtual positions for the SLP. The holographic combiner converges each one of the N instances of the light signal to a respective one of N spatially-separated exit pupils at the eye of the user. In this way, multiple instances of the exit pupil are distributed over the area of the eye and the eyebox of the WHUD is expanded.