An integrated connector-wavelength division multiplexing (WDM) device includes a housing defining a housing interior and a connector interface having at least one ferrule, a device input optical fiber extending from the housing to carry an input optical beam, a device output optical fiber extending from the housing to carry an output optical beam, and a plurality of channel filters positioned in the housing interior. A first channel filter is connected to the input optical fiber and a second channel filter is connected to the output optical fiber, wherein each of the plurality of channel filters is configured to separate at least one optical signal from a plurality of optical signals of the input optical beam and provide the at least one optical signal to the at least one ferrule. A fiber optic module or submodule having one or more integrated connector-WDM devices is also disclosed.

A germicidal lighting device includes an ultraviolet (UV) light source, a planar waveguide with a first surface, a second surface opposite to the first surface, and at least one edge surface perpendicular to the two parallel surfaces, and an optical filter. The UV light source is positioned adjacent to the edge surface of the planar waveguide to shine its UV light into the planar waveguide through the edge surface, and the UV light travels in the planar waveguide via total internal reflection. The first surface of the planer waveguide has a mechanism to reflect the UV light at an exit angle to exit the planar waveguide through the second surface. The optical filter filters a portion of the UV. Moreover, the light emitting area of the second surface of the planar waveguide is bigger than the light emitting surface area of the UV light source.

Provided are an optical film including a base material, and a hard coat layer, in which a refractive index of the base material at a wavelength of 550 nm is 1.60 or more, a difference between a refractive index of the base material at a wavelength of 435 nm and a refractive index of the base material at a wavelength of 610 nm is 0.11 or more, and a peak intensity PV value of a power spectrum obtained by subjecting a reflectivity spectrum of the optical film to fast Fourier transform is 0.3 or less, a polarizing plate having the optical film and an image display device.

An optical system includes a light-guide optical element (LOE) with a pair of parallel major external surfaces for guiding image light by internal reflection and a lateral coupling-in surface. An image projector includes a prism with a first surface associated with an illumination arrangement, a second surface associated with a reflective spatial light modulator (SLM), a third surface having a quarter-wave plate and a reflective collimating lens, and a fourth surface optically coupled to the coupling-in surface of the LOE. A polarizing beam splitter (PBS) is arranged within the prism to define a light path from the illumination arrangement via the SLM and the collimating lens to the coupling-in surface of the LOE. A fifth surface of the prism forms a continuation of one of the major external surfaces of the LOE.

A holographic display device with reduced color shifting in relation to different colors includes a display panel and a diffraction component. The display panel emits a first color light having a first emission efficiency and a second color light having a second emission efficiency. The first emission efficiency is greater than the second emission efficiency. The diffraction component on an optical path of the first and second colors of light diffracts the first color light at a first diffraction efficiency and the second color light at a second diffraction efficiency to generate a holographic image, the first diffraction efficiency is less than the second diffraction efficiency.

A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide layer that distributes light from light-emitting diodes across the display. The light guide layer may have a planar portion that provides backlight illumination to the array of pixels and may have bent edge portions that curve out of the plane of the planar portion. Light scattering structures may be formed in the planar portion to extract backlight illumination from the light guide layer. A light sensor adjacent to the bent portion may monitor leaked light. The light guide layer may have two bent portions on opposing edges of the light guide layer.

Implementations are described of an eyepiece for a head wearable display. The eyepiece includes a curved lightguide for guiding display light via total internal reflection between a peripherally-located input surface and a viewing region and an output coupler disposed across the viewing region to redirect the display light towards an eyeward direction for output from the curved light guide. The output coupler has an optical axis and has a set of reflective surfaces that includes at least two individual reflective surfaces to reflect incident display light toward the eyeward direction in at least two different directions relative to the optical axis of the output coupler. Other embodiments are disclosed and claimed.

An apparatus having optical waveguides for providing a large FOV is disclosed. A first light engine projects light into an input diffractive coupler of a first waveguide at a first central angle. An output coupler of the first waveguide projects the light out of the first optical waveguide. A second light engine projects light into an input diffractive coupler of a second waveguide at a second central angle that is greater than the first central angle. An output coupler of the second waveguide projects the light out of the second optical waveguide to intersect with the light projected out of the first optical waveguide. The first waveguide may be used to project a first part of an image into a central portion of a user's vision. The second waveguide may be used to project a second part of the image into a peripheral portion of the user's vision.

A lighting apparatus and a mobile terminal controlling the same are disclosed. The lighting apparatus comprises a light source module generating light; and an electrochromic module varying a wavelength of light incident from the light source module, wherein the electrochromic module absorbs light of a specific one among wavelength ranges of the light incident from the light source module, in accordance with a lighting mode which is input. The mobile terminal controlling a lighting apparatus, which includes a light source module and an electrochromic module, comprises an input module receiving a user input; a communication module transmitting a lighting control signal to the lighting apparatus; a display module displaying a setup window for setting a lighting mode of the lighting apparatus; and a controller controlling the input module, the communication module and the display module.

Systems and methods for multiplying the resolution and field-of-view of pixelated displays in accordance with various embodiments of the invention are illustrated. One embodiment includes an apparatus having an image projector for directing light from a pixelated image source into unique angular directions, an image processor electrically connected to the image projector for computing native images of the image source corresponding to first and second field-of-view portions and for computing shifted images in a predefined direction corresponding to the first and second field-of-view portions for sequential display by the image projector, a first set of gratings having a native configuration for propagating the light of the native image and at least one shifted configuration for propagating the light of at least one shifted image, and a second set of gratings having a first configuration for projecting the first field-of-view portion and a second configuration for projecting the second field-of-view portion.