A liquid crystal grating and a fabrication method thereof, and a display device are provided. The liquid crystal grating comprises a first substrate (1) and a second substrate (2) provided opposite to each other, and a liquid crystal layer (7); a plate-shaped transparent substrate (3) is provided on the first substrate (1), and a second transparent conductive layer (4), a transparent insulating layer (5) and a first transparent conductive layer (6) are sequentially provided on the second substrate (2); the first transparent conductive layer (6) includes first strip-shaped transparent electrodes (61) and second strip-shaped transparent electrodes (62) which are alternately provided, and there is a gap between the first strip-shaped transparent electrode (61) and the second strip-shaped transparent electrode (62) adjacent to each other; and the second transparent conductive layer (4) includes third strip-shaped transparent electrodes (41) provided at intervals. The liquid crystal grating reduces a black stripe.

An electro-optic modulator (EOM) for altering an optical path length of an optical field is described. The EOM comprises first and second Brewster-angle cut nonlinear crystals having a first and second optical axis. The optical axes are orientated relative to each other such that when an optical field propagates through the nonlinear crystals it experiences no overall deviation. The nonlinear crystals are also arranged to be opposite handed relative to the optical field. The EOM has the advantage that its optical losses are lower when compared with those EOMs known in the art. In addition, the EOM can be inserted into, or removed from, an optical system without any deviation being imparted onto the optical field. This reduces the levels of skill and effort required on the part of an operator. The described method and apparatus for mounting the nonlinear crystals also suppresses problematic piezo-electric resonances within the nonlinear crystals.

To improve the accuracy of fully controlling the direction of advancing light. The liquid crystal element includes a first substrate and a second substrate, a liquid crystal layer provided between one surface side of the first substrate and one surface side of the second substrate, a pair of electrodes provided on one surface side of the first substrate with a gap therebetween in a planer view, a high-resistance film provided on one surface side of the first substrate and disposed between the pair of electrodes in a planer view and connected thereto, a first alignment film provided on one surface side of the first substrate covering the pair of electrodes and the high-resistance film, a second alignment film provided on one surface side of the second substrate, wherein sheet resistance of the high-resistance film is greater than sheet resistance of the pair of electrodes.

A transferrable thin-film optical device and a head-mounted display are provided. A transferrable thin-film optical device comprises a thin-film layer providing at least one predetermined optical function. The thin-film layer is configured to be removably attached to a substrate, such that a molecular pattern for the at least one predetermined optical function of the thin-film layer is preserved post removal.

An optoelectronic system includes a concentration layer, a modulation layer including an array of light modulators, an exit layer that receives the modulation layer output having a modulation layer output spatial distribution and remaps the modulation layer output spatial distribution to a modified spatial distribution. A collector layer receives the modified spatial distribution to produce a collector layer output. A detector receives the collector layer output. A processor controls the modulation layer and receives the detector output to generate an image. The collector layer can receive the modified spatial distribution at a plurality of collector layer inputs and combine the plurality of collector layer inputs at a collector layer output. Modulators can be configured to direct couple modulated light to a collector layer, without using an exit layer. Configurations with spatial light modulator modules and sub-modules are described.

A laser apparatus includes at least one electro-optic (EO) medium through which a polarized laser beam passes for N times, forming a plurality of first-pass to Nth-pass beams, by reflecting the polarized laser beam from at least one reflection mirror, and a power supplier configured to alternately provide a 1/N of a half-wave (?/2) or quarter-wave (?/4) voltage and remove the voltage to the EO medium, ? being a wavelength of the polarized laser beam. The at least one EO medium is tilted at angle ? and/or angle ? with respect to one of the plurality of first-pass to Nth-pass beams. The at least one EO medium comprises a M number of EO mediums, and the power supplier is configured to alternately provide a 1/M*N of a half-wave (?/2) or quarter-wave (?/4) voltage and remove the voltage to each of the M number of EO mediums.

A liquid crystal grating and a fabrication method thereof, and a display device are provided. The liquid crystal grating comprises a first substrate (1) and a second substrate (2) provided opposite to each other, and a liquid crystal layer (7); a plate-shaped transparent substrate (3) is provided on the first substrate (1), and a second transparent conductive layer (4), a transparent insulating layer (5) and a first transparent conductive layer (6) are sequentially provided on the second substrate (2); the first transparent conductive layer (6) includes first strip-shaped transparent electrodes (61) and second strip-shaped transparent electrodes (62) which are alternately provided, and there is a gap between the first strip-shaped transparent electrode (61) and the second strip-shaped transparent electrode (62) adjacent to each other; and the second transparent conductive layer (4) includes third strip-shaped transparent electrodes (41) provided at intervals. The liquid crystal grating reduces a black stripe.

An electro-optic modulator (EOM) includes a first electro-optic (EO) material configured to receive light. The first EO material has an optic axis that is not parallel to the optical axis of the EOM. The optic axis indicates the direction through the first EO material along which a ray of light passing through the first EO material experiences no birefringence. The EOM also includes a polarization rotator that receives light output from the first EO material. The rotated light passes through a second EO material. The second EO material is positioned in the EOM such that its optic axis is not parallel to the optical axis of the EOM. The second EO material compensates for the birefringence and/or higher-order optical effects of the first material, thus reducing optical transmission errors of the EOM. The EOM may provide a wider field of view for imaging systems.

A Pockels cell that includes two similar electro-optical crystals oriented to achieve temperature compensation on a horizontal metal base common to the two crystals, and a carrier structure. It includes, between the base and the carrier structure, a thermally conductive element, which has a configuration that is symmetric about a vertical plane passing between the two crystals, in order to symmetrically distribute, to the base, a heat flux generated in the carrier structure asymmetrically with respect to the vertical plane.

An electro-optic modulator (EOM) includes a first electro-optic (EO) material configured to receive light. The first EO material has an optic axis that is not parallel to the optical axis of the EOM. The optic axis indicates the direction through the first EO material along which a ray of light passing through the first EO material experiences no birefringence. The EOM also includes a polarization rotator that receives light output from the first EO material. The rotated light passes through a second EO material. The second EO material is positioned in the EOM such that its optic axis is not parallel to the optical axis of the EOM. The second EO material compensates for the birefringence and/or higher-order optical effects of the first material, thus reducing optical transmission errors of the EOM. The EOM may provide a wider field of view for imaging systems.