An embodiment of the invention relates to a method for carrying out a time-resolved interferometric measurement comprising the steps of generating at least two coherent waves, overlapping said at least two coherent waves and producing an interference pattern, measuring the interference pattern for a given exposure time, thereby forming measured interference values, and analyzing the measured interference values and extracting amplitude and/or phase information from the measured interference values. In at least one time segment, hereinafter referred to as disturbed time segment, of the exposure time, the interference pattern is intentionally disturbed or destroyed such that the corresponding measured interference values describe a disturbed or destroyed interference pattern. In at least one other time segment, hereinafter referred to as undisturbed time segment, of the exposure time, the interference pattern is undisturbed or at least less disturbed compared to the disturbed time segment such that the corresponding measured interference values describe an undisturbed or less disturbed interference pattern. The measured interference values that were measured during the entire given exposure time, are filtered, wherein those interference values that were measured during the at least one disturbed time segment, are reduced, suppressed or discarded. The filtered interference values are analyzed and the amplitude and/or phase information is extracted from the filtered interference values.

The present disclosure provides an anticounterfeiting system based on optical technology that verify the authenticity of protected cinema screens. The optical technology includes taggants embedded or attached to the screen and an optical readout system that can interrogate the taggant layer and receive the taggant output. The taggants are capable of reflecting a pattern that unambiguously demonstrates that the screen contains the taggant. The taggants are covert because they are not visible under normal lighting conditions or during cinema operation, but are detected when interrogated by the optical readout system.

A lighting device for vehicles, including a housing, which is closed by a transparent cover panel and contains a holographic lamp unit having has a light source unit, and including an optical unit containing a holographic element for generating a holographic luminous surface, the holographic element being disposed between the light source unit and the cover panel, so that it may be back-lit with the aid of the light source unit, and the holographic unit has a structure such that the holographic luminous surface is disposed between the holographic element and the cover panel, forming a distance from the holographic element and the cover panel.

A display device according to an embodiment of the present disclosure includes: a transparent screen; one or more imaging units; and a video projection unit that acquires positional information regarding a predetermined subject included in each of captured images obtained by the one or more imaging units and then irradiates the transparent screen with video light on the basis of the positional information to cause predetermined video to appear on the transparent screen for the subject.

A hologram display system is disclosed. An example system includes a hologram apparatus including a sheet folded along preformed creases into a frustum structure configured to be actuated between a compressed state and an uncompressed state. The frustum structure has a base section and a top section connected by four side sections. The system also includes instructions stored in a memory of a consumer device, which when executed, cause a processor of the consumer device to display, on a screen of the consumer device, holographic interactive content that is related to the hologram apparatus, detect interaction with at least one of the holographic interactive content or the hologram apparatus after the hologram apparatus is placed on the screen of the consumer device, and change the display of at least a portion of the holographic interactive content based on the detected interaction.

Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (n), therefore control of side lobe magnitude may be achieved by controlling the distribution of n. The distribution of n may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of n.

Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (n), therefore control of side lobe magnitude may be achieved by controlling the distribution of n. The distribution of n may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of n.

Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (n), therefore control of side lobe magnitude may be achieved by controlling the distribution of n. The distribution of n may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of n.

A display article includes a plurality of display areas. Display areas adjacent to each other differ in at least one of an average hue, an average brightness and an average chroma and a first object to be displayed is formed by a combination of the plurality of display areas. At least one of the display areas includes a Fourier transform hologram configured to convert incident ray from a point light source or a laser light source into a second object to be displayed.

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium.