A hologram recording device includes a light outputting unit, which sequentially outputs laser beams having different wavelengths such that the laser beams are coaxial and includes an optical member and laser beam sources, and a recording unit, which sequentially irradiates the recording medium with the laser beams to record holograms in a multiwavelength superimposing manner. The optical member includes optical elements that reflect, in the optical direction, a laser beam incident thereon in a direction crossing the optical axis direction, and that allow a laser beam incident thereon in the optical axis direction to pass therethrough. The laser beam sources radiate laser beams to the optical member, and are arranged so that a laser beam emitted from a laser beam source among the laser beam sources that exposes a recording medium for a longer exposure period with the laser beam passes through a smaller number of optical elements.

Methods and systems for performing dynamic aperture holography are described. Examples include a method of recording multiple holograms in a photosensitive recording medium, where multiple signal beam angular apertures used to record the multiple holograms differ from each other. The multiple signal beam angular apertures can facilitate using a larger range of reference beam angular apertures. The multiple holograms are typically multiplexed, and examples of dynamic aperture holography enable packing the multiplexed holograms more densely in the recording medium. Some dynamic aperture holography systems include monocular objective lens architecture.

Disclosed are systems and methods for redirecting light corresponding to a light field or holographic object such that imagery generated by a light field or other display is perceived by a viewer without having to address the display itself.

An electronic device may include an optical system that redirects light from a display module towards an eye box along an optical path. The optical path may include a holographic coupler and a resolution-enhancing holographic element. The holographic element may include a first set of holograms and the coupler may include a second set of holograms. The first set of holograms may be characterized by a first set of selectivity curves having first primary lobes. The second set of holograms may be characterized by a second set of selectivity curves having second primary lobes that overlap the first primary lobes. This may configure the holographic element to narrow the second selectivity curves by diffracting some of the light out of the optical path, thereby optimizing the resolution of images in the light provided to the eye box.

An image output device of the disclosure facilitates enlargement of a stereoscopic image and includes a spatial light modulator, an image irradiation unit, and an address light irradiation unit. The spatial light modulator includes a main surface, a back surface, and pixels, reflects light emitted to the main surface, and modulates a phase of the light for each pixel. The image irradiation unit irradiates the main surface with light including an optical image. The address light irradiation unit irradiates the back surface with address light including a diffraction grating pattern. Each pixel of the spatial light modulator changes a phase modulation amount according to the intensity of the address light from a back surface. The address light irradiation unit dynamically change a diffraction grating pattern's direction on the back surface. The image irradiation unit irradiates the main surface with the optical image corresponding to the diffraction grating pattern's direction.

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.

A method for performing color image reconstruction of a single super-resolved holographic sample image includes obtaining a plurality of sub-pixel shifted lower resolution hologram images of the sample using an image sensor by simultaneous illumination at multiple color channels. Super-resolved hologram intensity images for each color channel are digitally generated based on the lower resolution hologram images. The super-resolved hologram intensity images for each color channel are back propagated to an object plane with image processing software to generate a real and imaginary input images of the sample for each color channel. A trained deep neural network is provided and is executed by image processing software using one or more processors of a computing device and configured to receive the real input image and the imaginary input image of the sample for each color channel and generate a color output image of the sample.

A microscope comprising a coherent light source producing a coherent light beam, a light beam guide system comprising a beam splitter configured to split the coherent light beam into a reference beam and a sample illumination beam, a sample holder configured to hold a sample to be observed, a sample illumination device configured to direct the sample illumination beam through the sample and into a microscope objective, a beam reuniter configured to reunite the reference beam and sample illumination beam after passage of the sample illumination beam through the sample to be observed, and a light sensing system configured to capture at least phase and intensity values of the coherent light beam downstream of the beam reuniter.

Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, a system includes a display having a plurality of display elements and an optical device configured to diffract a plurality of different colors of light to the display. The optical device is configured such that, when the plurality of different colors of light is incident on the optical device, the optical device separates light of individual colors of the different colors while suppressing crosstalk between the different colors.

Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, a system includes a display having a plurality of display elements and an optical device configured to diffract a plurality of different colors of light to the display. The optical device is configured such that, when the plurality of different colors of light is incident on the optical device, the optical device separates light of individual colors of the different colors while suppressing crosstalk between the different colors.