Abstract: A metasurface may include a substrate layer and a two-dimensional array of metallic optical pillars arranged in parallel rows extending vertically relative to the substrate layer. Gaps between adjacent pillars form optical resonators and a tunable dielectric material is positioned in the optical resonators between the pillars. A reflective layer positioned between the substrate layer and the two-dimensional array of pillars may include a two-dimensional array of elongated rectangular reflector patches arranged in parallel rows with an electrical isolation gap between adjacent rows of reflector patches. The plurality of reflector patches may be arranged lengthwise within each row with an off-resonance gap between adjacent reflector patches. The reflector patches in adjacent rows may be offset with respect to one another, such that the off-resonance gaps between adjacent reflector patches in one row are not aligned with the off-resonance gaps between adjacent reflector patches in an adjacent row.

Abstract: An optical system is disclosed. The optical system includes collimating optics, including a polarization beam splitter, which includes one or more polarizations selection reflection surfaces configured to split image light into (s)-polarized light and (p)-polarized light. The collimating optics further include a first mirror configured to receive and reflect (p)-polarized light emitted from the one or more polarization selective reflection surfaces, a second mirror configured to receive and reflect (s)-polarized light emitted from the one or more polarization selective reflection surface, and a corrector lens configured to receive (p)-polarized light reflected from the first mirror and receive (s)-polarized light reflected from the second mirror, wherein a light path of the (s)-polarized light and a light path of the (p)-polarized light are substantially equal, wherein the (p)-polarized light and the (s)-polarized light are configured to combine to form a user image.

Abstract: An example eye-tracking optical assembly includes a light source for illuminating an eye, a first diffraction type polarizing beam splitter (DT-PBS), and a second DT-PBS, wherein the first DT-PBS is configured to direct, based on polarization, a first portion of light from the second DT-PBS towards an eye-tracking detector.

Abstract: An optical device includes a stack that includes a first curved optical element stacked with a second curved optical element. The second curved optical element propagates light by total internal reflection. The stack also includes an incoupling diffractive grating that incouples the light into the second optical element and an outcoupling diffractive grating optically coupled to the incoupling diffractive grating through the second curved optical element. The outcoupling diffractive grating directs the light. The first curved optical element has a first refractive index, the second curved optical element has a second refractive index, and the first refractive index is different from the second refractive index by approximately 0.15 to 1.2.

Abstract: A lens module includes lenses sequentially arranged from an object side toward an image plane sensor and having respective refractive powers. A second lens of the lenses has a convex object-side surface and a convex image-side surface. A first lens and a third lens of the lenses are symmetrical to each other in relation to the second lens.

Abstract: A method of fabricating an optical aperture multiplier is provided. A slice and a first optical structure are obtained. The slice has external faces including a pair of parallel faces, and a first plurality of partially reflective internal surfaces oblique to the pair of parallel faces. The first optical structure has external surfaces including a planar coupling surface, and a second plurality of partially reflective internal surfaces oblique to the coupling surface. The slice is optically coupled with the first optical structure such that one of the faces of the pair of parallel faces is in facing relation with the coupling surface to form a second optical structure. At least one optical aperture multiplier is sliced from the second optical structure by cutting the second optical structure through at least two cutting planes perpendicular to the coupling surface. The optical aperture multiplier is preferably part of a near eye display augmented reality system.

Abstract: An augmented reality (AR) device including a variable focus lens of which a focal length may be changed by adjusting refractive power and adjusting the position of a focus adjustment region of the variable focus lens according to a direction of the user's view. The AR device may obtain an eye vector indicating a direction of the user's view using an eye tracker, adjust a refractive power of a first focus adjustment region of a first variable focus lens to change a focal length for displaying a virtual image, and complementarily adjust a refractive power of a second focus adjustment lens with respect to the adjusted refractive power of the first focus adjustment region.

Abstract: An electronic device according to various embodiments comprises: a display including a plurality of pixels; a first polarizing plate arranged on a first area of the display and capable of rotating, in a first rotational direction, a first light outputted through one or more first pixels included in the first area; a second polarizing plate arranged on a second area of the display and capable of rotating, in a second rotational direction, a second light outputted through one or more second pixels included in the second area; a first mirror arranged to have a first designated incline on the first area and capable of reflecting the first light rotating in the first rotational direction; a second mirror arranged to have a second designated incline on the second area and capable of reflecting at least a part of the second light rotating in the second rotational direction; and a flat lens capable of transmitting a first reflective light obtained by allowing the first light rotating in the first rotational direction

Abstract: A system and method including, receiving a plurality of optical beams in a first direction along a first plane in a first beam pattern towards an optical element based on a trajectory that causes at least a portion of the plurality of optical beams to not contact a surface of the optical lens. The system and method includes transmitting a first set of the plurality of optical beams in the first direction along a second plane. The system and method includes transmitting a second set of the plurality of optical beams in the first direction along the first plane. The system and method includes generating a second beam pattern by transmitting the first set and the second set of the plurality of optical beams through an optical element, wherein the second beam pattern adjusts the trajectory to cause the portion to contact the surface of the optical lens.

Abstract: According to one example, an optical element assembly includes a transparent rod, a mirror and a light emitting element. The rod transmits light of first wavelength region made incident on a first end of the rod and emits the light of the first wavelength region from a second end of the rod. The rod absorbs light of a second wavelength region falling out of the first wavelength region. The mirror is disposed on a side of the first end. The mirror transmits one of the light of the first and second wavelength regions, reflects the other. The light of the first and second wavelength regions are made incident on the first end of the rod. The light emitting element emits light of the second wavelength region made incident on the first end of the rod through the mirror.

Abstract: The present disclosure relates generally to methods and systems useful in imaging applications, especially biological imaging applications, and applications in the metrology, atmospheric, scientific and medical fields. In one aspect, the disclosure provides a method of imaging an object, including illuminating the object with incident radiation through one or more adaptive optical elements; receiving transmitted radiation from the object at a photodetector to provide a base image; and performing the following steps one or more times: adjusting the one or more adaptive optical elements, the adjustment including modifying an optical transfer function of the one or more adaptive optical elements, and receiving transmitted radiation from the object at the photodetector to provide an adjusted image; wherein the adjustment and receiving steps are performed until the adjusted image has substantially reduced aberrations compared to the base image.

Abstract: An optical isolator for use with high power, collimated laser radiation includes an input polarizing optical element, at least one Faraday optical element, at least two reflective optical elements for reflecting laser radiation to provide an even number of passes through said at least one Faraday optical element, at least one reciprocal polarization altering optical element, an output polarizing optical element, at least one light redirecting element for remotely dissipating isolated or lost laser radiation. The isolator also includes at least one magnetic structure capable of generating a uniform magnetic field within the Faraday optical element which is aligned to the path of the collimated laser radiation and a mechanical structure for holding said optical elements to provide thermal gradients that are aligned to the path of the collimated laser radiation and that provide thermal and mechanical isolation between the magnetic structure and the optical elements.

Abstract: There is provided a compact and high-resolution imaging lens at a low cost.

Abstract: Reflections from a display device are controlled using retarders arranged on the output side of a display panel which outputs light with a predetermined polarization state. First and second planes of incidence are defined in respect of first and second rays of light output from the device and first and second normals to first and second surfaces of optically transmissive material at first and second points at which the first and second rays of light are reflected. The retarders are selected to cause the polarization state of the first ray to be linearly polarized in a direction that is in the first plane of incidence, and to cause the polarization state of the second ray to be linearly polarized in a direction that is in the second plane of incidence. The reflections from the surfaces are minimized because for both surfaces the polarization direction is in-plane.

Abstract: A light detection and ranging (LIDAR) system for a vehicle includes a transmitter, a receiver, one or more scanning optics, and a circulator. The transmitter is configured to output a transmit beam. The receiver includes a first receive grating coupler and a second receive grating coupler. The circulator is configured to receive the transmit beam and provide the transmit beam to the one or more scanning optics, receive a return beam from reflection of the transmit beam by an object, split the return beam into at least a first component and a second component, and direct the first component to the first receive grating coupler and the second component to the second receive grating coupler.

Abstract: An optical device including: a display device configured to display an image; and a lens including a plurality of reflectors that reflect the image from the display device to a first surface of the lens, wherein the plurality of reflectors include: a first reflector; and a second reflector having a size different from a size of the first reflector.

Abstract: Disclosed is a fluorescent fundus camera which is one kind of ophthalmological diagnostic equipment, using a blue excitation light beam when a contrast medium appears in the retinal vessels. When an abnormal blood vessel is present, the contrast medium leaks into the retina or appears as color in tissues surrounding the retina, and the presence of damage to the retina and the appearance of abnormal neovascularization can be found.

Abstract: An electronic device such as a head-mounted device may have a display that produces a display image. The head-mounted device may have an optical system that merges real-world images from real-world objects with display images. The optical system provides the real-world images and display images to an eye box for viewing by a user. The optical system may use time interleaving techniques and/or polarization effects to merge real-world and display images. Switchable devices such as polarization switches and tunable lenses may be controlled in synchronization with frames of display images. Geometrical phase lenses may be used that exhibit different lens powers to different polarizations of light.

Abstract: A display device may include a plurality of tiled spatial light modulators (SLMs) imparting image information upon respective light beams to obtain image beams. Pupil steering optics are configured to steerably direct the image beams towards a same or different exit pupil locations within an eyebox of the display device, providing exit pupil replication and/or an expanded field of view. An eye tracking system provides location information of the user's eye, enabling the pupil steering optic to direct at least some of the image beams to a desired exit pupil location.

Abstract: A light projector (2; 102) for an augmented reality headset is disclosed. The light projector includes an image generator (4; 104) configured to provide an image with unpolarised light and a beam splitter (6; 106) configured to receive unpolarised light from the image generator and to split it into a first path and a second path. A first optical arrangement is configured to receive light from the beam splitter in the first path so that light is reflected, focused and directed back towards the beam splitter. A second optical arrangement configured to receive light from the beam splitter in the second path so that light is reflected, focused and directed back towards the beam splitter, wherein the first and second optical arrangements comprise first and second mirrors (12, 22; 112, 122) respectively.