Exemplary arrangements relate to methods for recording and reproducing holograms. A method of recording a hologram in a thresholded opto-magnetic medium (7) includes producing a collimated recording beam (1) with a pulsed laser. The intensity of the recording beam is selectively modulated by passage through a modulator (2). The recording beam is spatially shaped by passage through a shaping element (15). The shaped modulated recording beam is made convergent by passage through an aspheric lens (4). The convergent beam is deflected bidirectionally with a MEMS mirror (6) that is in operative connection with the modulator, such that multiple disposed locations on a surface of the medium are exposed to a constriction of the convergent shaped recording beam, causing a change in the medium in the locations. Reconstructing the hologram is carried out by illuminating the medium with a collimated laser beam and focusing with a lens, light from the illuminated medium onto a detection matrix. Additional methods of recording and reproducing holograms utilize alternative steps.

Disclosed are a holographic writing method and apparatus capable of re-writing (updating) holographic information and quickly writing the holographic information with high efficiency. In an embodiment, a holographic writing method for writing holographic information by emitting a beam at a holographic recording medium containing a photo-responsable polymer material having photoisomerization characteristics that change a molecular structure thereof by absorbing light energy, writes the holographic information by using a writing wavelength different from a maximum absorption wavelength in a light absorption spectrum of photoisomer molecule structures of the holographic recording medium. The maximum absorption wavelength is a wavelength at which light absorption rate is maximum in the light absorption spectrum. A difference between the light absorption rates of the photoisomer molecule structures at the writing wavelength is less than a difference between the light absorption rates of the photoisomer molecule structures at the maximum absorption wavelength.

The disclosure provides thermally reversible and reorganizable polymers for volume Bragg gratings. These polymers can be used in any volume Bragg gratings materials, but they are particularly useful in two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer. The reorganizable polymers are part of the matrix, and when heat is applied, specific crosslinked bonds break up allowing the material to relax, and permitting more monomers for the second writing step to enter the matrix. When heat is removed, crosslinking bonds re-form but with different, reorganized, bonding partners.

Disclosed are a holographic writing method and apparatus capable of re-writing (updating) holographic information and quickly writing the holographic information with high efficiency. In an embodiment, a holographic writing method for writing holographic information by emitting a beam at a holographic recording medium containing a photo-responsable polymer material having photoisomerization characteristics that change a molecular structure thereof by absorbing light energy, writes the holographic information by using a writing wavelength different from a maximum absorption wavelength in a light absorption spectrum of photoisomer molecule structures of the holographic recording medium. The maximum absorption wavelength is a wavelength at which light absorption rate is maximum in the light absorption spectrum. A difference between the light absorption rates of the photoisomer molecule structures at the writing wavelength is less than a difference between the light absorption rates of the photoisomer molecule structures at the maximum absorption wavelength.

An image display system is provided. The image display system includes: at least one holographic image acquiring device each configured to obtain holographic image information of a scene; an image synthesis device configured to generate holographic image synthesis information based on at least a part of the holographic image information obtained by the at least one holographic image acquiring device; and an image reconstruction device configured to reconstruct a holographic synthetic image in accordance with the holographic image synthesis information. The image display system can synthesize holographic image information to combine several holographic three-dimensional display scenes into one holographic three-dimensional scene, so that the user can perceive display effects almost the same as the real scenes, improving user experience. An image display method is also provided.

An image photography play method which is suited to playing a stereoscopic video. The image photography method includes: a step of forming a hologram pattern from a reference light and a subject light; a step of digitally processing the obtained hologram pattern; a step of writing the digitized hologram pattern as a magnetized vector pattern to a spatial lighting modulator which is formed from a magneto-optical material; and a step of inputting linearly polarized light into the spatial lighting modulator and playing an image according to the digitized hologram pattern.

Holographic operation equipment, including: a holographic image generating device configured to generate holographic image information including an operated object; an operation device configured to operate the operated object; an image transmitting device configured to transmit the holographic image information; and an information receiving device configured to receive a control signal and send the control signal to the operation device to control the operation of the operation device. The operation error resulted in panel displaying can be reduced. A holographic control equipment, a holographic operation method, a holographic control method and a telemedicine system are further provided.

An image display system is provided. The image display system includes: at least one holographic image acquiring device each configured to obtain holographic image information of a scene; an image synthesis device configured to generate holographic image synthesis information based on at least a part of the holographic image information obtained by the at least one holographic image acquiring device; and an image reconstruction device configured to reconstruct a holographic synthetic image in accordance with the holographic image synthesis information. The image display system can synthesize holographic image information to combine several holographic three-dimensional display scenes into one holographic three-dimensional scene, so that the user can perceive display effects almost the same as the real scenes, improving user experience. An image display method is also provided.