Abstract: Disclosed are a method and optical system for reconstructing a holographic image using an amplitude mask. According to an embodiment of the disclosure, an optical system may include: a light source for emitting light, a spatial light modulator for controlling a phase or amplitude of the light, an amplitude mask for spatially controlling the amplitude of the light and diffracting the light to expand a range of output angles of the light and a reconstruction plane on which a holographic image reconstructed based on interference of the light is formed, wherein the amplitude mask includes a plurality of apertures arranged at arbitrary locations, and wherein the plurality of apertures are formed as open holes or formed by mirrors that reflect or diffract the light.

Abstract: An embodiment relates to a holographic display apparatus with an enhanced viewing zone, which is characterized by comprising a spatial light modulator configured to modulate light incident from a light source into a light wave corresponding to a hologram; an optical system configured to perform a Fourier transform on the light wave from the spatial light modulator to generate a Fourier-transformed light wave and to propagate the light wave; and a beam splitting element configured to split the light wave propagated from the optical system to expand a viewing zone of a holographic display.

Abstract: A method and an apparatus for transmitting hologram data in binocular holographic display are disclosed. The method comprises obtaining left-eye gaze information and right-eye gaze information on a viewing window plane of the binocular holographic display based on pupil images of a user of the binocular holographic display; determining a left-eye hologram region and a right-eye hologram region on a hologram plane of the binocular holographic display based on the left-eye gaze information, the right-eye gaze information, and distance information between the viewing window plane and the hologram plane; and creating transmission hologram data corresponding to one binocular hologram region including an overlap hologram region, in which the left-eye hologram region and the right-eye hologram region overlap each other, based on input hologram data.

Abstract: A 3D optical microscope device of a small form factor optical system is disclosed. A transmission optical system device comprises a first lens having a left side disposed in contact with an input plane, and a second lens having a right side disposed in contact with a rear focal plane and disposed at a position spaced apart by a focal length of the first lens. The first lens and the second lens Fourier-transform a light signal incident on the input plane and output the transformed signal to the rear focal plane.

Abstract: A method of operating an electronic apparatus configured to generate holotomographic image data according to one embodiment of the present disclosure includes: acquiring fusion data from a fusion imaging apparatus in which a holographic tomography apparatus and a super-resolution fluorescence microscope are combined, in which the fusion data includes input data corresponding to holotomographic image data and output data corresponding to image data of the super-resolution fluorescence microscope; generating a cross-modal inference-based deep learning engine configured to generate a super-resolution tomographic image based on the input data and the output data; and acquiring a molecule-specific tomographic image using the deep learning engine, wherein the molecule-specific tomographic image has nano-resolution.

Abstract: A method and an apparatus for transmitting hologram data in binocular holographic display are disclosed. The method comprises obtaining left-eye gaze information and right-eye gaze information on a viewing window plane of the binocular holographic display based on pupil images of a user of the binocular holographic display; determining a left-eye hologram region and a right-eye hologram region on a hologram plane of the binocular holographic display based on the left-eye gaze information, the right-eye gaze information, and distance information between the viewing window plane and the hologram plane; and creating transmission hologram data corresponding to one binocular hologram region including an overlap hologram region, in which the left-eye hologram region and the right-eye hologram region overlap each other, based on input hologram data.

Abstract: An optical system for hologram displays is disclosed. According to an embodiment of a present disclosure, the optical system comprising a polarizing beam splitter for reflecting a light wave when the light wave is horizontally polarized or transmitting a light wave when the light wave is vertically polarized, a second quarter wave plate, a half mirror, and a first quarter wave plate, sequentially arranged in a first direction from the polarizing beam splitter, a third quarter wave plate and a first mirror, sequentially arranged in a second direction from the polarizing beam splitter, a fourth quarter wave plate and a second mirror, sequentially arranged in a third direction from the polarizing beam splitter, which is a direction opposite to the second direction and a reflective polarizer arranged in a fourth direction from the polarizing beam splitter.

Abstract: A 3D optical microscope device of a small form factor optical system is disclosed. A transmission optical system device comprises a first lens having a left side disposed in contact with an input plane, and a second lens having a right side disposed in contact with a rear focal plane and disposed at a position spaced apart by a focal length of the first lens. The first lens and the second lens Fourier-transform a light signal incident on the input plane and output the transformed signal to the rear focal plane.

Abstract: A holographic optical system and a holographic display method may be efficiently applied when using a spatial light modulator (SLM). A holographic display apparatus includes a spatial light modulator (SLM) configured to reproduce a hologram, and an optical system configured to perform Fourier transform with respect to the hologram of the SLM using a pair of first and second lenses, the first and second lenses being confocal. A Fourier plane which is a display reference image plane is positioned in the same plane space as the second lens.

Abstract: Disclosed herein is an apparatus for generating a hologram. The apparatus for generating a hologram according to an embodiment of the present disclosure may include: a first pattern generator configured to generate a first hologram pattern that is constructed by modeling a first lens capable of collecting incident light onto a first axis: a second pattern generator configured to generate a second hologram pattern that is constructed by modeling a second lens capable of collecting the incident light onto a second axis; and a hologram pattern combination unit configured to construct a final hologram pattern by combining the first and second patterns.

Abstract: In the present invention, by providing a hologram displaying apparatus including a light source configured to emit input light, a spatial light modulator configured to modulate the input light into diffracted light, and a plurality of noise filtering elements configured to remove optical noise components from the diffracted light modulated by the spatial light modulator, and display a hologram, an optical path of a light source for displaying the hologram can be drastically reduced while effectively performing spatial filtering.

Abstract: Disclosed herein are a holographic optical system structure and a holographic display method. In particular, disclosed herein are a holographic optical system and a holographic display method that can be efficiently applied when using a spatial light modulator (SLM). The holographic display apparatus includes a spatial light modulator (SLM) configured to reproduce a hologram, and an optical system configured to perform Fourier transform with respect to the hologram of the SLM using a pair of first and second lenses, the first and second lenses being confocal. A Fourier plane which is a display reference image plane is positioned in the same plane space as the second lens.

Abstract: In the present invention, by providing a 3D holographic display system comprising a modulation apparatus configured to modulate light emitted from a light source into a light wave corresponding to a 3D image, an optical apparatus configured to propagate the light wave into the first plane, and a diffraction apparatus configured to multiplex the propagated light wave to extend viewing angle of the 3D holographic display, a limited viewing zone of the holographic display determined by the SLM pixel pitch, may be extended by optical methods, such as using diffractive optical elements (DOE) for spatial-division multiplexing (SDM).

Abstract: Provided is a holographic display apparatus including a motor configured to synchronize with a hologram transmitted based on user's point of view and to rotate; a spatial light modulator configured to load hologram data generated based on the user's point of view in a fixed position state and to perform a light modulation; a mirror configured to provide the hologram which is light-modulated by the spatial light modulator according to the user's point of view during the rotation by rotation operation of the motor; and a hologram correction unit configured to compensate a rotation error between the fixed spatial light modulator and the rotating mirror and to provide a corrected hologram data to the spatial light modulator.

Abstract: In the present invention, by providing a hologram displaying apparatus including a light source configured to emit input light, a spatial light modulator configured to modulate the input light into diffracted light, and a plurality of noise filtering elements configured to remove optical noise components from the diffracted light modulated by the spatial light modulator, and display a hologram, an optical path of a light source for displaying the hologram can be drastically reduced while effectively performing spatial filtering.

Abstract: In the present invention, by providing a 3D holographic display system comprising a modulation apparatus configured to modulate light emitted from a light source into a light wave corresponding to a 3D image, an optical apparatus configured to propagate the light wave into the first plane, and a diffraction apparatus configured to multiplex the propagated light wave to extend viewing angle of the 3D holographic display, a limited viewing zone of the holographic display determined by the SLM pixel pitch, may be extended by optical methods, such as using diffractive optical elements (DOE) for spatial-division multiplexing (SDM).

Abstract: Provided is a method and an apparatus for correcting a distortion of a three-dimensional (3D) hologram, in which the method is performed by the apparatus and includes generating a sliced two-dimensional (2D) section of a hologram by slicing the hologram while performing translation in an optical axis direction, obtaining a sharp sliced image of the hologram from a sequence of images of generated sliced 2D sections using a focusing function of a camera, and analyzing a distortion of the obtained sliced image, and using such a method and apparatus may enable correction of a distortion of a 3D hologram independently from a display structure.

Abstract: Provided are an apparatus and a method for displaying a hologram image based on pupil tracking, wherein a hologram image display apparatus includes a location determiner to determine a location of a user using a captured image of the user and a hologram information reconstructor to reconstruct first hologram information as second hologram information optimized for the location of the user to reproduce the hologram image.

Abstract: A method and apparatus for correcting a distortion of a holographic display. The method includes tracking a location of a viewing window by tracking a location of a pupil of a user and calculating a central location of the viewing window, generating a wavefront aberration by determining an object point and an image point based on a location of a light source and the central location of the viewing window and using ray tracing, and calculating a complex aberration light field using the generated wavefront aberration. Thus, a quality of a holographically reproduced image in a viewing window-based holographic display may be improved.

Abstract: The present invention discloses a holographic display apparatus including a light irradiating unit configured to irradiate light using an optical fiber array backlight, a spatial light modulator (SLM) configured to perform modulating the irradiated light, a lens configured to irradiate hologram images based on the modulated light, a pupil tracking unit configured to acquire location of an observer's pupil by pupil tracking, and a hologram generating unit configured to generate parallax hologram images that correspond to the location of pupil.