A system is provided. The system includes a light source configured to emit an infrared light to illuminate an eye of a user. The system includes a grating disposed facing the eye and including a birefringent material film configured with a uniform birefringence lower than or equal to 0.1. The grating is configured to diffract the infrared light reflected from the eye, and transmit a visible light from a real world environment toward the eye, with a diffraction efficiency less than a predetermined threshold. The system includes an optical sensor configured to receive the diffracted infrared light and generate an image of the eye based on the diffracted infrared light.

An eyewear device includes a lightguide having a world-side surface and an eye-side surface, a display oriented to emit light toward the lightguide, and a beam steering element that includes a first polarization grating positioned along an optical path between the display. The first polarization grating diffracts light emitted by the display into orders having different polarizations and the orders are selectively conveyed into different eyeboxes. The eyewear device also includes a frame that supports the lightguide, the display, and the first polarization grating. In some cases, the different polarizations include a right circular polarization or a left circular polarization and the beam steering element includes a polarization dependent filter that filters right circularly polarized light in a first state and left circularly polarized light in a second state.

Provided are an optical element including a first optically-anisotropic layer consisting of a cured layer of a composition including a first liquid crystal compound, in which the first optically-anisotropic layer has 0.24 or more of a refractive index anisotropy Δn.sub.550 which is measured with light having a wavelength of 550 nm, the first optically-anisotropic layer has a first liquid crystal alignment pattern in which a direction of an optical axis derived from the first liquid crystal compound continuously changes rotationally in at least one in-plane direction, and in the first liquid crystal alignment pattern, in a case where a length Λ over which the direction of the optical axis rotates 180° in a plane is defined as a single period, the length Λ of the single period is 1.6 μm or less; a method for forming a photo-alignment pattern; and a method for manufacturing an optical element.

Infrared reflectors are described. In particular, infrared reflectors with reduced off-axis color are described. Such infrared reflectors may be useful in laminated glass constructions, particularly for applications where the glass may be exposed to water.

An input coupler component, optical display system and electronics apparatus are disclosed. The input coupler component, comprisesing: an input polarization volume grating, which is disposed to deflect an. input polarized electromagnetic wave into a waveguide in a total internal reflection manner and an input polarization management layer, which. adjusts the polarization. of the deflected electromagnetic wave to a polarization state different from that of electromagnetic wave to be deflected by the input polarization volume grating,

A system is provided. The system includes a light source configured to emit an infrared light to illuminate an eye of a user. The system includes a grating disposed facing the eye and including a birefringent material film configured with a uniform birefringence lower than or equal to 0.1. The grating is configured to diffract the infrared light reflected from the eye, and transmit a visible light from a real world environment toward the eye, with a diffraction efficiency less than a predetermined threshold. The system includes an optical sensor configured to receive the diffracted infrared light and generate an image of the eye based on the diffracted infrared light.

A liquid crystal grating and its fabrication method, and a display panel are provided in the present disclosure. The liquid crystal grating includes a first light adjustment component and a second light adjustment component, disposed oppositely. The first light adjustment component includes a first liquid crystal panel and a first polarization adjustment component; the second light adjustment component includes a second liquid crystal panel and a second polarization adjustment component; and using a second direction as an extending direction of a rotation axis, when the first light adjustment component is rotated 180° around the rotation axis, an alignment direction of the first liquid crystal panel is in parallel with an alignment direction of the second liquid crystal panel, and an optical axis direction of the first polarization adjustment component is in parallel with an optical axis direction of the second polarization adjustment component.

A diffractive optical element including a diffraction layer including a plurality of optical axes along an in-plane direction, wherein the diffraction layer includes an anisotropic material that satisfies one of Relationship Equations 1A to 3A
Δn.sub.1(450 nm)<Δn.sub.1(550 nm)≤Δn.sub.1(650 nm)  Relationship Equation 1A
Δn.sub.1(450 nm)≤Δn.sub.1(550 nm)<Δn.sub.1(650 nm)  Relationship Equation 2A
Δn.sub.1(450 nm)=Δn.sub.1(550 nm)=Δn.sub.1(650 nm)  Relationship Equation 3A
wherein, in Relationship Equations 1A to 3A, Δn.sub.1 (450 nm) is a birefringence of the anisotropic material at a wavelength of 450 nanometers, Δn.sub.1 (550 nm) is a birefringence of the anisotropic material at a wavelength of 550 nanometers, and Δn.sub.1 (650 nm) is a birefringence of the anisotropic material at a wavelength of 650 nanometers.

An optical component includes a substrate and a metasurface comprising one or more linearly birefringent elements. The linearly birefringent elements define a grating configured to implement parallel polarization analysis for a plurality of polarization orders for incident light of an arbitrary polarization.

Methods, systems and devices for diffractive waveplate lens and mirror systems allowing electronically pointing and focusing light at different focal planes. The system can be incorporated into a variety of optical schemes for providing electrical control of transmission. In another embodiment, the system comprises diffractive waveplates of different functionality to provide a system for controlling not only focusing but other propagation properties of light including direction, phase profile, and intensity distribution. The diffractive waveplate lens and mirror systems are applicable to optical communication systems.