For comfortable viewing of a 3-D scene at various viewing angles, a display having a large tracking range for a variable viewer distance is required. A controllable light-influencing element deflects light in coarse steps in a viewer range. Within said steps, the light is deflected by a further controllable light-influencing element continuously or with fine gradation. The light modulation device is suitable in holographic or autostereoscopic displays for guiding the visibility ranges of the image information to be displayed so as to follow the eyes of the viewers.

A system includes a plurality of optical identifiers and a reader for the optical identifiers. Each optical identifier has an optical substrate and a volume hologram (e.g., with unique data, such as a code page) in the optical substrate. The reader for the optical identifiers includes an illumination source (e.g., a laser), and a camera. The illumination source is configured to direct light into a selected one of the optical identifiers that has been placed into the reader to produce an image of the associated volume holograms at the camera. The camera is configured to capture the image. The captured image may be stored in a digital format by the system.

An illumination distribution system for distributing high power illumination to a set of projectors. The system includes a display element, such as a spatial light modulator (SLM), receiving light from a laser. The system includes a fiber optic array with connection locations for optical fibers. The system includes projectors that are each coupled to the fiber optic array at one or more of the connection locations with at least one optical fiber. The system includes a controller operating the display element at a first time to display a first hologram and at a second time to display a second hologram differing from the first hologram such that the laser light is split, with equal or unequal splitting ratios, into beams that are selectively directed to the connection locations of the fiber optic array (e.g., based on a 2D routing pattern used to generate the holograms).

Embodiments are directed to an apparatus for creating a scene comprising: a plurality of micro-mirrors configured to rotate between an off position and at least two on positions to generate a plurality of holograms, and a processor configured to select positions for the micro-mirrors based on an input specification of the scene.

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.

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.

According to an aspect of the present inventive concept there is provided a device for imaging of a microscopic object, the device comprising: an array of light sensitive areas, each being sensitive to detect light spanning a wavelength range of at least 400-1200 nm; at least one light source configured to generate light at a plurality of wavelengths within the wavelength range, comprising at least one wavelength in a visible part of the wavelength range and at least one wavelength in a short-wave infrared, SWIR, part of the wavelength range, and arranged to illuminate the microscopic object with the generated light such that at least part of the light is scattered by the microscopic object; wherein the device is configured to transmit the scattered light and non-scattered light, from the same light source, to the array of light sensitive areas configured to detect an interference pattern formed between the scattered light and the non-scattered light, for each wavelength.

According to an aspect of the present inventive concept there is provided a device for imaging of a microscopic object, the device comprising: an array of light sensitive areas sensitive to detect light spanning a wavelength range of at least 400-1200 nm; at least one light source comprising at least a first point of operation in which the at least one light source is configured to generate visible light, and a second point of operation in which the at least one light source is configured to generate infrared light, and being arranged to illuminate the microscopic object such that light is scattered by the microscopic object; wherein the array of light sensitive areas is configured to detect an interference pattern formed between the scattered light and non-scattered light; the device being configured to be set in a selected point of operation from the at least first and second points of operation, for detecting the interference pattern for imaging the microscopic object at a wavelength defined by the selected point of operation.

A totagram is produced by an iterative spectral phase recovery process resulting in complete information recovery using special masks, without a reference beam. Using these special masking systems reduce computation time, number of masks, and number of iterations. The special masking system is (1) a unity mask together with one or more bipolar binary masks with elements equal to 1 and −1, or (2) a unity mask together with one or more phase masks, or (3) a unity mask together with one pair of masks or more than one pair of masks having binary amplitudes of 0's and 1's, in which the masks in the pair are complementary to each other with respect to amplitude, or (4) one or more pairs of complementary masks with binary amplitudes of 0's and 1's without a unity mask.

A system includes a plurality of optical identifiers and a reader for the optical identifiers. Each optical identifier has an optical substrate and a volume hologram (e.g., with unique data, such as a code page) in the optical substrate. The reader for the optical identifiers includes an illumination source (e.g., a laser), and a camera. The illumination source is configured to direct light into a selected one of the optical identifiers that has been placed into the reader to produce an image of the associated volume holograms at the camera. The camera is configured to capture the image. The captured image may be stored in a digital format by the system.