A curved reflective has at least one location having a radius of curvature in a range from about 6 mm to about 1000 mm. Each location on the reflective polarizer has a maximum reflectance greater than about 70% for a block polarization state, a maximum transmittance greater than about 70% for an orthogonal pass polarization state, and a minimum transmittance for the block polarization state. For a continuous first portion of the reflective polarizer extending between different first and second edges of the reflective polarizer and defining disjoint second and third portions of the reflective polarizer, the minimum transmittance of the reflective polarizer for the block polarization state is higher at each location in at least 70% of the first portion than at each location in at least 70% of the second portion and at each location in at least 70% of the third portion.

Embodiments discussed herein refer to generating multiple laser beams from a single beam source. Single source multi-beam splitters can produce multiple beams from a single source, precisely control the exit angle of each beam, and ensure that each beam has substantially the same intensity.

A beam splitter plate configured to dispose obliquely in a transmission path of an imaging beam of a camera and comprising a transmissive plate, and a beam splitter film supported on the transmissive plate and parallel to the transmissive plate, wherein the beam splitter film is configured to reflect visible light and transmit near-infrared light, or the beam splitter film is configured to reflect the near-infrared light and transmit the visible light, wherein a thickness of the transmissive plate satisfies that transmission path lengths of the visible light and the near-infrared light in the imaging beam in the transmissive plate are both less than a projection length of the beam splitter film on an optical axis of the imaging beam.

Embodiment of present invention provide a micro-optics module. The module includes a glass body of pentagon shape having five side surfaces including an upper side surface, a left side and a right side surface next to the upper side surface, a lower side surface next to the left side surface, and a 5th side surface next to and between the lower side surface and the right side surface. The glass body is adapted to, upon incident of a first optical signal at the left side surface, cause the first optical signal to propagate toward and exit the glass body at the right side surface and, upon incident of a second optical signal at the right side surface, cause the second optical signal to reflect back at the left side surface; reflect back at the 5th side surface; and finally exit the glass body at the upper side surface.

Beamformers are formed (e.g., carved) from a stack of transparent sheets. A rear face of each sheet has a reflective coating. The reflectivities of the coatings vary monotonically with sheet position within the stack. The sheets are tilted relative to the intended direction of an input beam and then bonded to form the stack. The carving can include dicing the stack to yield stacklets, and polishing the stacklets to form beamformers. Each beamformer is thus a stack of beamsplitters, including a front beamsplitter in the form of a triangular or trapezoidal prism, and one or more beamsplitters in the form of rhomboid prisms. In use, a beamformer forms an output beam from an input beam. More specifically, the beamformer splits an input beam into plural output beam components that collectively constitute an output beam that differs in cross section from the input beam.

A lens assembly for display includes a display, a lens assembly, and a prism assembly. The display emits a first light beam. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces; the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces; and the optical multilayer film is disposed between the third and fifth surfaces. A second light beam enters the first prism through the first surface and exits by the second surface. The first light beam exits the lens assembly and enters the second prism through the eighth surface, and exits the first prism by the second surface. The lens assembly and the prism assembly satisfy: 0.80%≤E.sub.1/E.sub.0≤0.95%; wherein E.sub.0 is an energy of the first light beam emitted from the display and E.sub.1 is an energy of the first light beam passes through the lens assembly.

Augmented reality glasses including a first image source, a second image source and a lens set are provided. The first image source emits a first image beam. The second image source emits a second image beam. The lens set includes a first lens and a second lens and disposed on the path of the image beams. A gap is disposed between the first lens and the second lens. The refractive index of the gap is lower than that of the first lens. The image beams enter the lens set at an incident surface of the lens set, are reflected at a first surface of the first lens, and exit the lens set at an exit surface. The optical path length of the first image beam from the first image source to the eyes is different from that of the second image beam from the second image source to the eyes.

The invention relates to a diffractive waveguide display element comprising a waveguide body (13) having a first surface and a second surface opposite to the first surface, an outcoupling-diffractive optical element on said first surface for coupling light propagating inside the waveguide body out of the waveguide body, and a narrow-band reflector element (21) on said second surface. The invention also relates to a display device comprising such element.

Disclosed herein is methods and apparatus for recording a holographic waveguide utilizing an inverted holographic master technique. In some embodiments, an apparatus for recording a holographic waveguide is provided. The apparatus may include a source of light configured to provide a recording beam; a master substrate with a non-grating modulated surface and a grating modulated surface, wherein the grating modulated surface is opposite to the non-grating modulated surface and is configured to diffract the recording beam; a bottom substrate with opposing light transmitting surfaces coated with anti-reflection coatings overlaying the grating modulated surface of the substrate and separated from the master substrate by a gap; and an exposure cell containing holographic recording material directly facing the non-grating modulated surface of the master substrate. Advantageously, the inverted holographic master technique mitigates the effects of unwanted reflected exposure light.

A time-of-flight (ToF) optical beam splitter includes a main body having a first reflectivity and comprising a main surface configured to receive a receive light beam from an environment that corresponds to a transmit light beam transmitted into the environment, where the main surface includes a first region and a second region; and a reflective coating disposed on the main surface at the first region and excluded from the main surface at the second region, where the reflective coating has second reflectivity that is greater than the first reflectivity. The ToF optical beam splitter has a time variable splitting ratio with respect to the receive light beam that is dependent on a ToF of a round trip light beam comprising of the transmit light beam and the receive light beam.