The present invention belongs to the field of functional materials, and particularly relates to a directly printable image recording material, a preparation method and application thereof. The image recording material comprises 25 to 78.8 parts by mass of a photopolymerizable monomer, 0.2 to 5 parts by mass of a photoinitiator, 20 to 70 parts by mass of an inert component, and 0.05 to 2 parts by mass of a thermal polymerization inhibitor, and has an initial viscosity of 200 to 800 mPa.Math.s. The photopolymerizable monomer includes a thiol monomer and an olefin monomer, at least one of which is a silicon-based monomer with polyhedral oligomeric silsesquioxane as a silicon core. By introducing a POSS-based thiol or olefin monomer into the photopolymerizable monomer in combination with other material components, the recording material is allowed to have an initial viscosity of 200 to 800 mPa.Math.s, and meanwhile, the low thermal conductivity characteristic of the POSS-based photopolymerizable monomer is utilized, so that image storage quality is ensured, continuous industrial production of the image recording material is achieved, the process cost is reduced and the production efficiency is improved.

The present disclosure relates to a photopolymer composition including a polymer matrix or a precursor thereof having a predetermined chemical structure; a photoreactive monomer; and a photoinitiator, a hologram recording medium, an optical element and a holographic recording method using the same.

An optical reflective device for homogenizing light including a waveguide having a first and second waveguide surface and a partially reflective element is disclosed. The partially reflective element may be located between the first waveguide surface and the second waveguide surface. The partially reflective element may have a reflective axis parallel to a waveguide surface normal. The partially reflective element may be configured to reflect light incident on the partially reflective element at a first reflectivity for a first set of incidence angles and reflect light incident on the partially reflective element at a second reflectivity for a second set of incident angles.

An embodiment of the present disclosure provides a holographic optical element and a manufacturing method of a holographic optical element including holographic gratings, the manufacturing method including: a step (a) of forming a photosensitive substrate by coating one surface of a substrate with a photosensitive resin; and a step (b) of recording the holographic gratings by irradiating each of one surface and the other surface of the photosensitive substrate with laser light, wherein in the step (a), the photosensitive resin is applied so that a height of a photosensitive resin coating layer varies along a predetermined direction.

A diffractive optical element, such as a holographic plasma lens, can be made by direction two laser beams so that they overlap in a nonlinear material, to form an interference pattern in the nonlinear material. The interference pattern can modify the index of refraction in the nonlinear material to produce the diffractive optical element. The interference pattern can modify the distribution of plasma for the nonlinear material, which can adjust the index of refraction. A third laser beam can be directed through the diffractive optical element to modify the third laser beam, such as to focus, defocus, or collimate the third laser beam.

Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (Δn), therefore control of side lobe magnitude may be achieved by controlling the distribution of Δn. The distribution of Δn may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of Δn.

The present invention belongs to the field of functional materials, and particularly relates to a directly printable image recording material, a preparation method and application thereof. The image recording material comprises 25 to 78.8 parts by mass of a photopolymerizable monomer, 0.2 to 5 parts by mass of a photoinitiator, 20 to 70 parts by mass of an inert component, and 0.05 to 2 parts by mass of a thermal polymerization inhibitor, and has an initial viscosity of 200 to 800 mPa.Math.s. The photopolymerizable monomer includes a thiol monomer and an olefin monomer, at least one of which is a silicon-based monomer with polyhedral oligomeric silsesquioxane as a silicon core. By introducing a POSS-based thiol or olefin monomer into the photopolymerizable monomer in combination with other material components, the recording material is allowed to have an initial viscosity of 200 to 800 mPa.Math.s, and meanwhile, the low thermal conductivity characteristic of the POSS-based photopolymerizable monomer is utilized, so that image storage quality is ensured, continuous industrial production of the image recording material is achieved, the process cost is reduced and the production efficiency is improved.

A rotational geometric phase hologram has geometric phase optical elements (GPOEs) serially cascaded along a common optical axis to form a GPOE cascade used for receiving a linearly-polarized light beam and generating output light beams at an exit surface of the last GPOE. Interference occurred in the output light beams creates a polarization interference pattern on the exit surface. A photoalignment substrate, when positioned in close proximity to the exit surface, records the pattern. Advantageously, each GPOE is rotatable about the common optical axis. Respective rotation angles of the GPOEs are determined according to a spatially-varying linear polarization orientation distribution selected to be generated for the polarization interference pattern. Particularly, the respective rotation angles are reconfigurable to provide the periodicity required for the spatially-varying linear polarization orientation distribution over a range of allowed periodicities while keeping the periodicity of spatially-varying optic axis orientation distribution of each GPOE to be fixed.

The invention relates to a method for producing a holographic optical element by providing a recording stack comprising at least one recording element laminated on at least one supporting element, irradiating at least a part of the recording stack with at least one recording beam in an irradiating step, wherein during the irradiating step, the recording stack bends, providing a bending deviation threshold for the recording stack, and adjusting at least one first process parameter such that an expected maximum bending deviation of the recording stack does not exceed the bending deviation threshold, wherein the at least one first process parameter influences the bending behaviour of the recording stack during the irradiating step.

An optical reflective device for homogenizing light including a waveguide having a first and second waveguide surface and a partially reflective element is disclosed. The partially reflective element may be located between the first waveguide surface and the second waveguide surface. The partially reflective element may have a reflective axis parallel to a waveguide surface normal. The partially reflective element may be configured to reflect light incident on the partially reflective element at a first reflectivity for a first set of incidence angles and reflect light incident on the partially reflective element at a second reflectivity for a second set of incident angles.