An apparatus includes: an optical phased array (e.g., on a photonic integrated circuit), a focusing element, which can be at a fixed position relative to the optical phased array and configured to receive an optical beam from the optical phased array, and a steering element, which can be at a fixed position relative to the focusing element and configured to transmit the optical beam received from the focusing element. In some implementations, at least one of the focusing element or the steering element is externally coupled to the photonic integrated circuit.

A spatial light modulator cell and arrays of spatial light modulator cells are disclosed. The spatial light modulator cells can comprise a phase change material (PCM) having a first side and a second side; an optical reflector configured to reflect an optical beam passing from the first side to the second side; and a PCM heater thermal conductively coupled to the PCM, wherein thermal modulation of the PCM modulates a phase of the PCM which varies light transmission through the PCM. Methods of making spatial light modulator cells and arrays are also disclosed.

The present invention provides a display device, including: a first chromatic light source configured to generate first chromatic light, a dichroic reflection layer disposed on a light emergent side of the first chromatic light source and allowing the first chromatic light to pass through, and a quantum dot layer. The dichroic reflection layer has a first surface facing away from the first chromatic light source, and the first surface has a plurality of recessed portions. The quantum dot layer includes a plurality of quantum dot blocks, and the quantum dot blocks are disposed corresponding to the recessed portions.

An optical demultiplexer is provided, comprising: a first mirror and a second mirror; an electro-optic modulator arranged in an optical trajectory between the first and second mirrors; and a first polarizing beam-splitter arranged in the optical trajectory between the first mirror and the electro-optic modulator. The electro-optic modulator is configured to change, when in a first state, a polarization of light pulses passing through the electro-optic modulator; the light pulses travelling in the optical trajectory between the first mirror and the second mirror are displaced perpendicular to a propagation direction of the light pulses between the first mirror and the second mirror during each round of travelling forth and back between the first mirror and the second mirror; and the first polarizing beam-splitter is configured to reflect the light pulses which are displaced with respect to each other perpendicular to the propagation direction onto different, respective output trajectories.

A display device, a display panel, and an array substrate are provided. The array substrate includes an active layer and a light-blocking and heat-insulating layer. The light-blocking and heat-insulating layer is arranged on a side of the active layer and configured to block light and insulate heat for the active layer. The light-blocking and heat-insulating layer includes light-absorbing materials and light-reflecting materials. One of the light-absorbing materials and the light-reflecting materials form a light-blocking body. The other one of the light-absorbing materials and the light-reflecting materials are dispersed in the light-blocking body.

A device for modulation of light (16) having a wavelength, comprising: a first substrate (10) with a first face (81) and a second opposite face (82), and comprising a first electrode (11); a second substrate (20) adjacent to the second face (82) and defining a gap between the first and second substrate (10, 20), the second substrate (20) comprising a second electrode (21); a responsive liquid crystal layer (15) disposed in the gap, wherein the responsive liquid crystal layer (15) has a flexoelectro-optic chiral nematic phase, and is birefringent with an optic axis that tilts in response to an applied electric field between the first and second electrode (11, 21); and a mirror adjacent to the second substrate (20), the mirror configured to reflect incident circular polarised light while preserving its handedness.

The present disclosure provides an optical apparatus including a light source for generating light, where the light includes a first polarized light of a first phase. The optical apparatus further includes an adjustment structure for changing a propagation path of the light. The adjustment structure includes a polarization beam splitting structure for reflecting the first polarized light.

According to one embodiment, an electro-optical device includes a panel, a sealant, a liquid crystal layer, a light source and a reflective layer. The panel includes first and second transparent substrates, an electro-optical area and a peripheral area. The seal is provided in the peripheral area and adheres the substrates. The liquid crystal layer contains a polymer liquid crystal composition. The light source opposes a side surface of the first or second substrates. The reflective layer is between the substrates. The panel includes a first edge, and the reflective layer overlaps a portion of the sealant, located along the first edge.

An optical circuit includes one or more input waveguides, a plurality of output waveguides, and a reflector structure. At least a portion of the reflector structure forms an interface with the one or more input waveguides. The portion of the reflector structure has a smaller refractive index than the one or more input waveguides. An electrical circuit is electrically coupled to the optical circuit. The electrical circuit generates and sends different electrical signals to the reflector structure. In response to the reflector structure receiving the different electrical signals, a carrier concentration level at or near the interface or a temperature at or near the interface changes, such that incident radiation received from the one or more input waveguides is tunably reflected by the reflector structure into a targeted output waveguide of the plurality of output waveguides.

A method of controlling a field of view of a passive infrared sensor, the method comprising: providing a passive infrared sensor comprising: an infrared detector configured to detect infrared signals from a plurality of detection zones; and an electrochromic mask comprising a plurality of electrochromic sections; and applying a voltage to one or more of the plurality of electrochromic sections to control transmission of a predetermined range of infrared signals to the detector from one or more of the plurality of detection zones.