A holographic image film, and a holographic image recording method and reconstruction method are provided. The holographic image recording method includes a preparation step, an irradiation step and a recording step. The preparation step includes stacking a holographic negative film on a transparent substrate. The irradiation step includes emitting object light and reference light. The reference light is emitted into the transparent substrate and undergoes multiple times of total reflections in a thickness of the transparent substrate to form total internal reflected light. The recording step includes generating a holographic image interference line by a mutual interference between the total internal reflected light and the object light, and recording the holographic image interference line on the holographic negative film in a photosensitive manner.

Provided are on-axis and off-axis digital hologram generating device and method. The on-axis and off-axis digital hologram generating device includes an object phase generator configured to access a phase file of an object stored in a storage device and generate object phase information from the phase file of the object; a digital object light generator configured to generate digital object light information based on a light property of object light input by a user and the object phase information generated by the object phase generator; a digital reference light generator configured to generate digital reference light information based on a light property of reference light input by the user; and a digital hologram generator configured to generate a digital hologram based on hologram property information input by the user, the digital object light information generated by the digital object light generator, and the digital reference light information generated by the digital reference light generator.

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.

A dual-image projection apparatus includes a light source, a spatial light modulator including a first modulation module and a second nodulation module, and a Fourier lens. The spatial light modulator is positioned at a front focal plane of the Fourier lens. The first modulation module modulates light from the light source through the Fourier lens to reproduce a first 2D holographic image and the second modulation module modulates the light through the Fourier lens to reproduce a plurality of second 2D holographic images. The dual-image projection apparatus further includes a first light-diffusing film to display the first 2D holographic image to produce a first virtual image and a plurality of second light-diffusing films to respectively display the plurality of second 2D holographic images sequentially in a rate to produce a 3D virtual image.

A display system (300) comprising an optical system and a processing system. The optical system comprising a spatial light modulator (380), a light source, a Fourier transform lens, a viewing system (320, 330) and a processing system. The spatial light modulator is arranged to display holographic data in the Fourier domain, illuminated by the light source. The Fourier transform lens is arranged to produce a 2D holographic reconstruction in the spatial domain (310) corresponding to the holographic data. The viewing system is arranged to produce a virtual image (350) of the 2D holographic reconstruction. The processing system is arranged to combine the Fourier domain data representative of a 2D image with Fourier domain data representative of a phase only lens to produce first holographic data, and provide the first holographic data to the optical system to produce a virtual image.

A method for encoding complex-valued signals of a computer-generated hologram into a phase-modulating optical element for the reconstruction of a three-dimensional object, and to a computer program product for encoding complex-valued signals of a computer-generated hologram, and to a holographic display for the reconstruction of a three-dimensional object. The object is to reduce the effort on encoding a complex-valued spatial distribution by an iteration method on the basis of phase encoding, so that the computer-generated hologram resulting therefrom can be represented more rapidly and with the same or an improved reconstruction quality. In particular, the convergence during the iterative optimization is intended to be accelerated. This is achieved by a method in which degrees of freedom of the hologram plane as well as the reconstruction plane are used for optimizing the iteration method for rapid convergence and maximization of the diffraction efficiency in the signal range.

A method for processing a three-dimensional holographic image includes obtaining depth images from depth data of a three-dimensional object, dividing each of the depth images into a predetermined number of sub-images, obtaining interference patterns of computer-generated hologram (CGH) patches corresponding to each of the sub-images by performing a Fourier transform to calculate an interference pattern in a CGH plane for object data included in each of the sub-images, and generating a CGH for the three-dimensional object using the obtained interference patterns of the CGH patches.

Techniques for using holographic imagery for eyeline reference for performers. A first computer generated object is identified for display to a first performer at a designated physical position on a set. A first holographic projection of the first computer generated object is generated using a first holographic display. The first holographic display is configured to make the first holographic projection appear, to the first performer, to be located at the designated physical position on the set. One or more images of the performer are captured using an image capture device with a field of view that encompasses both the first performer and the designated physical position on the set. The captured one or more images depict the first performer and do not depict the first holographic projection. The first computer generated object is added to the captured one or more images after the capturing.

A method for processing a three-dimensional holographic image includes obtaining depth images from depth data of a three-dimensional object, dividing each of the depth images into a predetermined number of sub-images, obtaining interference patterns of computer-generated hologram (CGH) patches corresponding to each of the sub-images by performing a Fourier transform to calculate an interference pattern in a CGH plane for object data included in each of the sub-images, and generating a CGH for the three-dimensional object using the obtained interference patterns of the CGH patches.

Technology is described for methods and systems for a diffractive optic device (525) for holographic projection. The diffractive optic device can include a lens (535) configured to convey a hologram. The lens (535) further comprises a patterned material (510) formed with an array of cells having a non-planar arrangement of cell heights extending from a surface of the patterned material. The lens further optionally comprises a filling material (530) to fill gaps on both surfaces of the patterned material.