A structured light projector includes a light source configured to emit light, a structured light pattern mask configured to receive the light emitted by the light source and including a first region configured to generate a first structured light having a first polarization and a second region configured to generate a second structured light having a second polarization that is different from the first polarization, and a polarization multiplexing deflector configured to deflect the first structured light and the second structured light generated by the structured light pattern mask, to different directions, respectively.

A photonic polarizing beamsplitter is disclosed. The beamsplitter comprises a first waveguide, a second waveguide located above the first waveguide, and a birefringent coupler between the first waveguide and the second waveguide. The birefringent coupler has an effective refractive index for a TM mode which is greater than a refractive index of the first waveguide, and an effective refractive index for a TE mode which is less than the refractive index of the first waveguide. The second waveguide comprises a plurality of outwardly tapering legs with a gap between adjacent legs that are connected downstream to a body. The vertical beamsplitter uses less surface area.

An optical communications terminal including a polarizing element responsive to a first linearly polarized optical beam and rotating the first linearly polarized optical beam in a first linear direction, a beam separator responsive to and passing the first linearly polarized optical beam, and a circular polarizing element responsive to the first linearly polarized optical beam from the beam separator and circularly polarizing the first linearly polarized optical beam for transmission, where the circular polarizing element is switchable between two orthogonal switching states. The terminal receives a circularly polarized optical beam from another terminal and linearly polarizes the circularly polarized optical beam from the other terminal in a second linear direction that is orthogonal to the first linear direction and the beam separator directs the circularly polarized optical beam from the other terminal in a direction away from the polarizing element.

A see-through display including a polarized reflective pinhole mirror display. The pinhole mirror display includes a plurality of tiny switchable polarized mirrors. The respective polarized mirrors individually reflect impinging light from an illuminator, and guide the respective portion of light into a pupil of an eye. A reflective optically powered surface reflects light from the illuminator. Each mirror has a first polarization and reflects a portion of light and produces a picture element (pixel) that forms a virtual image seen by the eye of the user. A user may view the reflected virtual image having the first polarization from the illuminator, as well as the image from the real world via a rear substrate that has a second polarization. Although the mirrors are very small, human eyes can still detect the mirrors if they are not polarized. The mirrors and other components are polarized so that the eye can see the real world filtered with the second polarization, but not the mirrors having a different first polarization.

A distance measurement device includes an imaging optical system, an imaging device, and a distance measurement section which measures based on a plurality of images captured by the imaging device, a distance from the imaging device to the target to be imaged. The imaging optical system includes a polarization beam splitting section which splits a first polarization beam having a first polarization direction and a second polarization beam having a second polarization direction substantially orthogonal to the first polarization direction and allows the polarization beam splitting section to be incident on the imaging device. The imaging device receives the first polarization beam to capture a first polarization image and the second polarization beam to capture a second polarization image. The distance measurement section measures the distance to the target to be imaged on the basis of the first polarization image and the second polarization image.

An optical film, a backlight unit, and a display device are provided. An optical film includes: a plurality of base layers arranged at predetermined intervals in a horizontal direction, and a plurality of barriers respectively provided between pairs of the plurality of base layers, wherein each of the plurality of barriers includes first and second films inclined with a first inclined angle with respect to a lower surface of each of the plurality of base layers, wherein the first film is configured to: transmit light polarized in a first direction, and reflect light polarized in a second direction perpendicular to the first direction, and wherein the second film is configured to phase-retard the light polarized in the first direction to the light polarized in the second direction.

A display apparatus includes a guide element, and an incident optical system causing light from a display element to enter the guide element. The guide element includes a first light guide part guiding the light from the incident optical system in a first direction and a second light guide part guiding the light from the first light guide part in a second direction intersecting with the first direction. The first light guide part has mirrors disposed along the first direction and guiding the light to the second light guide part by reflection. The mirrors include a first mirror and a second mirror. Each of the first and second mirrors has a first reflection region and a second reflection region having a higher reflectance than the first reflection region. Light having transmitted through the first reflection region of the first mirror enters the second reflection region of the second mirror.

An array of optically pumped magnetometers includes an array of vapor cells; and an array of beam splitters. The array of beam splitters is arranged into columns, including a first column, and rows. Each row and each column includes at least two of the beam splitters. The array of beam splitters is configured to receive light into the first column of the array and to distribute that light from the first column into each of the rows and to distribute the light from each of the rows into a plurality of individual light beams directed toward the vapor cells.

A window film including at least a first adhesive layer containing a weathering agent, a barrier layer, a second adhesive layer, and a light control layer in this order.

A device includes a first lens. The device also includes a first polarized image sensor coupled with the first lens and configured to capture, from a first perspective, a first set of image data in a plurality of polarization orientations. The device also includes a second lens disposed apart from the first lens. The device further includes a second polarized image sensor coupled with the second lens and configured to capture, from a second perspective different from the first perspective, a second set of image data in the plurality of polarization orientations.