A gating and a 3D holographic display device are provided. The grating includes grating electrodes and spacing pillars disposed between a first substrate and a second substrate opposite to the first substrate. The grating electrodes extend along a first direction and are arranged along a second direction. Along a plane parallel to the first substrate, positions of spacing pillars are referred to as matrix points. The spacing pillars correspond to the matrix points; the matrix points include multiple first matrix point units arranged as an array. A minimum repeating unit of the matrix points includes four first matrix point units located at four vertices of a first quadrilateral. Two adjacent sides of the first quadrilateral are defined as a first unit vector and a second unit vector, respectively; and an angle between the first unit vector and the second unit vector is α1, and 0°≤α1≤90°.

Portable common path shearing interferometry-based holographic microscopy systems. The system includes a light source, a sample holder, a microscope objective lens, a shear plate and an imaging device positioned in a common path shearing interferometry configuration. A housing is configured to receive and hold the shear plate and maintain a position of the shear plate relative to the microscope objective lens.

A system and method to produce a hologram of a single plane of a three dimensional object includes an electromagnetic radiation assembly to elicit electromagnetic radiation from a single plane of said object, and an assembly to direct the elicited electromagnetic radiation toward a hologram-forming assembly. The hologram-forming assembly creates a hologram that is recorded by an image capture assembly and then further processed to create maximum resolution images free of an inherent holographic artifact.

A device for detecting at least one object present in a sample, the device including a light source to emit at least one incident wave at a wavelength λ, a detection volume intended to receive the object, and to receive at least one incident wave, an image sensor positioned to receive at least one scattered light wave obtained by diffraction of the incident wave on the object and a reference wave from the source and not diffracted on the object and to generate a holographic image, and a computer data processing device to digitally reconstruct the object based at least on the holographic image and the wavelength λ. The device also comprises a support comprising patterns organized to form at least one diffraction grating, the grating being periodic and having a pitch P, such that λ/2≤P≤2λ.

A system and method to produce a hologram of a single plane of a three dimensional object includes an electromagnetic radiation assembly to elicit electromagnetic radiation from a single plane of said object, and an assembly to direct the elicited electromagnetic radiation toward a hologram-forming assembly. The hologram-forming assembly creates a hologram that is recorded by an image capture assembly and then further processed to create maximum resolution images free of an inherent holographic artifact.

A polarization volume hologram (PVH) lens includes a PVH layer having a freeform design. The PVH layer includes a first region and a second region having different optical properties.

Portable common path shearing interferometry-based holographic microscopy systems are disclosed herein. In one embodiment, a system is configured for positioning a laser light source, a sample holder, a microscope objective lens, a shear plate and the imaging device in a common path shearing interferometry configuration. In some embodiments, the systems are relatively small and lightweight and exhibit good temporal stability. In one embodiment, a system for automatic cell identification and visualization using digital holographic microscopy using an augmented reality display device can include an imaging device mounted to an augmented reality display device, configured to capture one or more images of the hologram of the sample disposed on the sample holder illuminated by a beam. The augmented reality display device can include a display and can be configured to render a pseudo-colored 3D visualization of the sample and information associated with the sample, on the display.

An image display device includes image cells arranged two-dimensionally. Each image cell has a hologram layer. The hologram layer includes a diffraction grating in which a one-dimensional grating pattern extending in a first direction is repeated in a second direction perpendicular to the first direction. Among the plurality of image cells, two or more image cells that are in a row in the second direction and correlated to one color constitute one image cell group. The image cell group includes a section in which the spatial frequency of the diffraction grating is proportionately small as the distance in the second direction from one end of the image cell group increases such that, while a viewpoint is positioned at a predetermined angle relative to an image display device, the two or more image cells constituting the image cell group display the same color as each other.

A system and method to produce a hologram of a single plane of a three dimensional object includes an electromagnetic radiation assembly to elicit electromagnetic radiation from a single plane of said object, and an assembly to direct the elicited electromagnetic radiation toward a hologram-forming assembly. The hologram-forming assembly creates a hologram that is recorded by an image capture assembly and then further processed to create maximum resolution images free of an inherent holographic artifact.

A system and method to produce a hologram of a single plane of a three dimensional object includes an electromagnetic radiation assembly to elicit electromagnetic radiation from a single plane of said object, and an assembly to direct the elicited electromagnetic radiation toward a hologram-forming assembly. The hologram-forming assembly creates a hologram that is recorded by an image capture assembly and then further processed to create maximum resolution images free of an inherent holographic artifact.