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 lens assembly includes a first, second, and third lenses. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces and the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces. The lens assembly for display satisfies at least one of following conditions: 0.60≤D.sub.in/TTL≤0.75; 0.28≤D.sub.in/f.sub.123≤0.35; 4.56 mm≤D.sub.in≤5.02 mm; wherein D.sub.in is an effective optical diameter of the light incident surface, TTL is an interval from the light incident surface to the light emitting surface along the optical axis, and f.sub.123 is an effective focal length of a combination of the first lens, the second lens, and the third lens.

A lens is formed from at least two sections or bodies that are shaped to mate with each other, and a multilayer optical film is sandwiched between these two sections. Smooth surfaces of each section combine to provide a first optical surface of the lens, e.g., a concave, convex, or flat optical surface. The multilayer optical film includes a stack of polymer layers configured to selectively reflect light by constructive or destructive interference, at least some of the polymer layers being birefringent. The multilayer optical film may thus be or comprise e.g. a reflective polarizer and/or a narrow band or otherwise notched reflector. The multilayer optical film has an extended terminus that separates the smooth surfaces of the two sections. Any edge defects such as cracks or delaminations that may exist along the extended terminus are characterized by an average defect distance of no more than 100 or 50 microns.

A lighting device provides a pump light unit for emitting pump light, a phosphor element for generating conversion light in response to excitation by the pump light, and a wavelength-dependent beam splitter which is reflective to the pump light and transmissive to the conversion light. The first pump light portion is incident on a light incidence surface of the beam splitter and is reflected from the beam splitter to the phosphor element. The element emits the conversion light in response to the excitation by the pump light. The conversion light is likewise incident on the light incidence surface, but transmitted by the beam splitter and exiting at a light exit surface of the beam splitter opposite the light incidence surface. Concurrently, the second pump light portion, reflected from the beam splitter, is directed onto the light exit surface of the beam splitter and is superposed with the conversion light.

A mirror plate (100) for a Fabry-Perot interferometer (300) includes a substrate (50), which includes silicon (Si), a semi-transparent reflective coating (110) implemented on the substrate (50), a de-coupling structure (DC1) formed on the substrate (50), a first sensor electrode (G1a) formed on top of the de-coupling structure (DC1), and a second sensor electrode (G1b), wherein the de-coupling structure (DC1) includes an electrically insulating layer (60a), and a first stabilizing electrode (G0a), which is located between the first sensor electrode (G1a) and the substrate (50).

A broadband partial reflector includes a multilayer polymeric optical film having a total number of optical repeating units that monotonically increases in thickness value from a first side to a second side of the multilayer polymeric optical film. A baseline optical repeating unit thickness profile is defined by a first plurality of optical repeating units and having a first average slope, and a first apodized thickness profile of the multilayer polymeric optical film is defined by a second plurality of optical repeating units having a second average slope being at least 5 times greater than the first average slope. The second plurality of optical repeating units define the first side of the multilayer polymeric optical film and join the first plurality of optical repeating units. The second plurality of optical repeating units are in a range from 3-15% of the total number of optical repeating units.

Embodiment of present invention provide a wavelength division multiplexing (WDM) module. The WDM module includes a substrate having a first side and a second side opposing the first side, wherein the first side includes a transpassing region coated with an anti-reflective (AR) film and a reflective region coated with a high-reflective (HR) film, and the second side includes multiple ports of optical paths; multiple WDM filters attached to the multiple ports at the second side of the substrate, wherein surfaces of the WDM filters attached to the substrate are coated with WDM films; and at least one reflector attached to the second side of the substrate in a space between the multiple WDM filters, wherein the reflector has a first surface attached to the substrate and a second surface, opposing the first surface, that has a convex shape and coated with a high-reflective (HR) coating.

One variation of a system for serving augmented visual content to a user includes: a visor including a substrate of a transparent material and a reflective coating applied across the substrate, configured to selectively reflect visible light within a first reflection channel, and configured to transmit wavelengths of visible light outside of the first reflection channel, wherein the first reflection channel spans a first band of wavelengths; a projection system configured to project visual content in a first output channel onto an interior surface of the visor, the first output channel including a first peak-power wavelength of visible light within the first reflection channel and excluding wavelengths of visible light outside the first reflection channel; and a support structure configured to locate the visor on the user's head with the visor in a field of view of the user and configured to locate the projection system relative to the visor.

The application provides an augmented reality display device comprising a projection source module and an optical path module, the projection source module comprising a projection source (12) and a beam shaping element (14) which are integrated into a unitary piece, and the optical path module comprising a beamsplitter (20) and a reflector (60), wherein virtual image light (VL) emitted from the projection source (12) and carrying virtual image information is emitted out of the projection source module after being shaped by the beam shaping element (14), projected onto the beamsplitter (20) first, then reflected onto the reflector (60) by the beamsplitter (20), then reflected by the reflector (60), and enters a human eye (E) eventually, and scene light (AL) carrying real scene information enters the reflector (60) from an outside of the reflector (60), and is transmitted through the reflector (60) and the beamsplitter (20) into the human eye (E). The application also provides a wearable augmented reality system comprising the augmented reality display device and the projection source module for the augmented reality display device.

An optical element includes a plurality of partially reflecting surfaces which are provided in parallel to each other with intervals, reflect a portion of image light and external light, and transmit another portion of the image light or external light; and a light transmitting member which supports the plurality of partially reflecting surfaces, in which the light transmitting member includes an incident plane that enters the image light and the external light, and an emission plane that emits the image light and the external light, and each of the plurality of the partially reflecting surfaces is disposed so as to be inclined with respect to the incident plane and the emission plane, and has a plurality of regions having different reflectances in an inclination direction.