Abstract: An electro-active lens provides simultaneous focusing at two different optical powers. It does this with a stack of electro-active lens elements aligned along the same optical axis that each focus light in different polarization states (e.g., horizontal and vertical polarization states). If a first and second electro-active lens elements have different optical powers, light in a first polarization state can be focused to one optical power and light in a second polarization state can be focused to a different optical power simultaneously. The electro-active lens can be switched between different single and multiple optical powers. People with presbyopia may use the electro-active lens mounted in eyewear in place of conventional bifocal glasses. The electro-active lens may also be used in a scope to improve target aiming.

Abstract: A wavelength converter for LiDAR systems, such as automotive LiDAR, is disclosed. Implementation of the wavelength converter in LiDAR systems makes possible generation and modulation of laser light in the silicon response region, conversion of the laser light to an eye-safe wavelength for emission and reflection from a target, and efficient conversion of the wavelength of the laser light to the silicon response region. The wavelength converter may implement a single-loop counter-propagating wavelength conversion scheme which provides both up-conversion and down-conversion of the signal within the same loop. The wavelength conversion design also has the potential for vehicle-to-vehicle (V2V) communication to enable a combined LiDAR and V2V communication system.

Abstract: Provided is a meta-optical device exhibiting a target phase delay profile with respect to incident light of a predetermined wavelength band, the meta-optical device including: a first layer including a plurality of first nanostructures and a first surrounding material surrounding the plurality of first nanostructures, and having a first phase delay profile of a first tendency that is substantially equal to a tendency of the target phase delay profile; a second layer including a plurality of second nanostructures and a second surrounding material surrounding the plurality of second nanostructures, and having a second phase delay profile of a second tendency that is substantially opposite to the tendency of the target phase delay profile; and a third layer including a plurality of third nanostructures and a third surrounding material surrounding the plurality of third nanostructures, wherein the third layer is different from the second layer in terms of at least one of a material and an arrangement rule.

Abstract: In order to provide an optical device and a diffusion plate which has high transmittance and is capable of reducing speckle noise, the present it is a diffusion plate 1 in which a plurality of microlens cells 11 are arranged on both surfaces of a transparent substrate 10, the diffusion plate 1 having a first microlens array 12A which is formed on one surface of the transparent substrate 10 and comprises a plurality of concave or convex microlens cells 11, and a second microlens array 12B which is formed on the other surface on the reverse side from the one surface and comprises a plurality of concave or convex microlens cells 11, and the diffusion plate 1 being configured so that light emitted from the microlens cells 11 constituting the first microlens array 12A is incident on the microlens cells 11 constituting the second microlens array 12B.

Abstract: An artificial neuron unit and neural network for processing of input light are described. The artificial neuron unit comprises a modal mixing unit, such as multimode optical fiber, configured for receiving input light and applying selected mixing to light components of two or more modes within the input light and for providing exit light, and a filtering unit configured for applying preselected filter onto said exit light for selecting one or more modes of the exit light thereby providing output light of the artificial neuron unit.

Abstract: A display device that includes: a display panel; a sensor that is disposed on a side of the display panel; and a discoloration layer that is disposed on an opposite side of the display panel, wherein a transmittance of the discoloration layer may vary by 5 times to 20 times, which depends on whether or not ultraviolet light is present, with respect to light having a wavelength of about 600 nm to about 630 nm.

Abstract: An image lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has positive refractive power. The third lens element has refractive power. The fourth lens element has refractive power. The fifth lens element with negative refractive power has a concave object-side surface, wherein both of the surfaces of the fifth lens element are aspheric. The sixth lens element with refractive power has a concave image-side surface, wherein the image-side surface thereof has at least one inflection point, and both of the surfaces of the sixth lens element are aspheric. The image lens assembly has a total of six lens elements with refractive power.

Abstract: A pixel for creating an optical phase change includes a transparent electrical insulator, a first electrical conductor disposed on the transparent electrical insulator, the first electrical conductor comprising an antenna component and a connector component, an electrical insulator disposed on the first electrical conductor, a transparent semiconductor disposed on the electrical insulator, and a second electrical conductor disposed on the transparent semiconductor. The transparent semiconductor is sufficiently thick to prevent plasmonic resonance from occurring at an interface between the transparent semiconductor and the second electrical conductor.

Abstract: In an example, the eyewear includes an optical element, electronic components, and a support structure configured to support the optical element and the electronic components. The support structure defines a region for receiving at least a portion of a head of a user. The eyewear also includes a biometric sensor coupled to the electronic components and supported by the support structure. The biometric sensor is attached to the support structure and positioned to detect, in the region, a biometric signal representative of a biometric of the user for processing by the electronic components.

Abstract: An optical photographing lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has refractive power. The second lens element has positive refractive power. The third lens element with positive refractive power has an image-side surface being concave in a paraxial region thereof. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fifth lens element are aspheric, and at least one of the surfaces of the fifth lens element has at least one inflection point. The optical photographing lens assembly has a total of five lens elements with refractive power.

Abstract: An optical modulator in which an optical signal is input from one side of a package, includes in the package, a chip that optically modulates the optical signal and in which an input waveguide and an output waveguide of the optical signal are led to mutually different destinations each being one end of the chip facing the one side of the package and a side surface of the chip orthogonal to the one end of the chip; an input optical system coupled to the input waveguide of the chip; and an output optical system coupled to the output waveguide of the chip.

Abstract: Provided a light modulating device including a variable mirror including a plurality of lattice structures, the plurality of lattice structures including a material having a refractive index that changes based on a temperature of the material, a distributed Bragg mirror spaced apart from the variable mirror and provided above the variable mirror, the distributed Bragg mirror including a first material layer and a second material layer that are alternately stacked, and a refractive index of the first material layer being different from a refractive index of the second material layer, and a heating portion configured to heat the plurality of lattice structures and provided below the variable mirror opposite to the distributed Bragg mirror.

Abstract: Multi-wavelength light is directed to an optic including a substrate and metasurface optical components deposited on a surface of the substrate. The metasurface optical components comprise a pattern of silicon dielectric resonators with nonperiodic gap distances between adjacent dielectric resonators. Incident light directed to the metasurface optical components is scattered and phase-shifted by the configuration of the gap distances and the widths and thicknesses of the dielectric resonators. Each dielectric resonator has a rectangular cross-section such that a first phase shift is imparted for a transverse-electric (TE) component of the incident light and a second phase shift is imparted for a transverse-magnetic (TM) component of the incident light.

Abstract: An electronic device may include a display system for presenting images close to a user's eyes. The display system may include a display unit that directs light and an optical system that redirects the light from the display unit towards a user's eyes. The optical system may include an input coupler and an output coupler formed on a waveguide. The input coupler may redirect light from the display unit so that it propagates in the waveguide towards the output coupler. The output coupler may redirect the light from the input coupler so that it exits the waveguide towards the user's eyes. A light-redirecting element may be used to redirect edge light that would otherwise be outside of the user's field of view towards the user's eyes.

Abstract: The disclosure provides an imaging lens assembly, which sequentially includes, a movable diaphragm, a first lens, a second lens with a refractive power, a third lens with a refractive power, a fourth lens with a positive refractive power and a fifth lens with a refractive power, wherein an effective focal length f1 of the first lens and an effective focal length f4 of the fourth lens meet 1.0<f4/f1<2.3; and TSmin, a distance from the movable diaphragm at a minimum distance from an imaging surface of the imaging lens assembly to an object-side surface of the first lens on the optical axis, TSmax, a distance from the movable diaphragm at a maximum distance from the imaging surface of the imaging lens assembly to the object-side surface of the first lens on the optical axis and CT1, a center thickness of the first lens on the optical axis meet 1.0<(|TSmin|+|TSmax|)/CT1<1.5.

Abstract: A projector includes a lens, a beam processing module, a plurality of digital micromirror devices, a reflecting module and an illumination module. The beam processing module is disposed with respect to the lens. The digital micromirror devices are disposed around the beam processing module, wherein a beam projecting path is defined between the lens and the digital micromirror device. The reflecting module is disposed with respect to the digital micromirror devices and located beyond the beam projecting path. The illumination module is disposed with respect to the reflecting module. An initial beam projected by the illumination module is reflected to the digital micromirror devices by the reflecting module, such that the digital micromirror devices generate a plurality of image beams. The beam processing module combines the image beams to form a projecting beam and projects the projecting beam onto the lens along the beam projecting path.

Abstract: An electric field-controlled refractive index tunable device includes a phase change correlated transition metal oxide layer, and E-field responsive charge dopants. The E-field responsive charge dopants either accumulate in the phase change correlated transition metal oxide layer or are depleted from the phase change correlated transition metal oxide layer in response to an E-field applied to the phase change correlated transition metal oxide layer.

Abstract: There are disclosed an electrically tunable metasurface and a method for modulating propagation characteristics of an incident plane wave. The electrically tunable metasurface comprising: i) a plurality of scatterer rings, each one of the plurality of scatterer rings including bow-tie radiator elements, the bow-tie radiator elements in a corresponding scatterer ring having a same geometric configuration; and ii) a plurality of electrodes, each electrode being configured to provide a biasing voltage to the corresponding scatterer ring. The method comprising: i) receiving, by an electrically tunable metasurface, the incident plane wave; and ii) modulating the propagation characteristics of the incident plane wave by providing specific biasing voltage to the corresponding scatterer rings.

Abstract: An observation apparatus includes a case having a transmissive window, an image sensor, an optical system, and a light source housed in the case, and an optical deflection unit. The optical system is configured to condense light incident inside the case to form an image of a sample inside a container. The light source is configured to emit light to the outside of the case without passing through the optical system. The optical deflection unit is configured to deflect light emitted to the outside of the case from the light source to a first direction proceeding toward the transmissive window. An angle of exit between the first direction and an optical axis of the optical system is different from an angle of incidence between a second direction in which light emitted to the outside of the case is incident on the optical deflection unit, and the optical axis.

Abstract: A portable electronic device and a movable lens-shutting module thereof are provided. The lens-shutting module includes a first magnetic assembly, a second magnetic assembly and a movable shielding assembly. The first magnetic assembly includes a fixed magnetic field generator and a movable magnetic structure including a matching portion. The second magnetic assembly includes a fixed magnetic structure, a flexible structure and a movable magnetic field generator including a limiting portion. The movable shielding assembly includes a lens shielding portion corresponding to a lens module, a matching opening matching with the matching portion, and a limiting opening corresponding to the limiting portion.