An optical structure is provided. The optical structure includes a sensor, a bandpass filter and a plurality of protrusions. The bandpass filter is disposed above the sensor. The protrusions are disposed on the bandpass filter. The bandpass filter allows light with a wavelength of 700 nm to 3,000 nm to pass through. The protrusions have a size distribution that controls the phase of the incident light to be between 0 and 2π.

The present disclosure describes photonic materials that reversibly change color in response to the material being stretched or otherwise mechanically deformed.

An infrared-cut filter structure is disclosed. The infrared-cut filter structure uses a glass substrate having an upper side and a lower side, with a first multilayer film formed on the upper side and a second multilayer film formed on the lower side so that the infrared-cut filter can effectively filter out infrared light and transmit visible light to produce normal colored images.

An Anderson localized hyperspectral filter array is disclosed which includes a base layer and a plurality of optical layers deposited on the base layer selected from two or more materials, each material having a refractive index that is different from the other materials of the two or more materials, wherein no consecutively deposited optical layers have the same refractive index, each of the plurality of optical layers having a thickness chosen based on a random number within a predetermined range.

An article includes a reflector having a first surface, a second surface opposite the first surface, and a third surface; and a first selective light modulator layer external to the first surface of the reflector; wherein the third surface of the reflector is open. A method of making an article is also disclosed.

A display system includes a display panel configured to emit polarized light having a first polarization state and substantially distinct blue, green and red emission spectra having respective blue, green and red full widths at half maxima (FWHMs). The display system includes a reflective polarizer configured to reflect the polarized image light as a first reflected polarized image light. For substantially normally incident light and for the first polarization state, the reflective polarizer has a reflectance of greater than about 60% across each of the blue and red FWHMs, and a transmittance of at least about 50% for at least a first wavelength between the FWHMs of the blue and green emission spectra, and for at least a second wavelength between the FWHMs of the green and red emission spectra.

An article including a reflector with a reflectance band that is substantially constant as a function of an incidence angle; a polymeric multilayer film packet including a front surface partial reflector with a reflectivity that increases with an increasing incidence angle away from the normal; and a wavelength-selective absorber with a transmission band that at least partially coincides with the reflectance band of the reflector.

A polymer film having a laminated structure is provided. The polymer film includes a plurality of first overlapping film units and a plurality of second overlapping film units disposed in an alternately-laminated manner with the first overlapping film units. Each of the first overlapping film units includes a first lower film and a first upper film, and each of the first overlapping film units is configured to reflect visible light in a first visible light wavelength range. Each of the second overlapping film units includes a second lower film and a second upper film, and each of the second overlapping film units is configured to reflect visible light in a second visible light wavelength range. The first visible light wavelength range is different from the second visible light wavelength range.

An electronic device or other equipment may include an infrared-transparent one-way mirror. The infrared-transparent one-way mirror may be formed by a layer of material that is supported by a head-mounted support structure or other support structure. The support structure may support the layer of material so that the layer of material separates an exterior region from an interior region. Optical components in the interior region may be overlapped by the layer of material. The optical components may include visible light components such as a visible light camera and infrared components such as an infrared light-emitting device and an infrared light sensor. The optical components may operate through the layer of material while being hidden from view by the reflective appearance of the one way mirror from the exterior region.

A multilayer film having a multi-layer structure unit which is a 51-layered or more multiple layer formed by alternately layering a layer (A layer) a main component of which is a polyester resin (resin A) having a dicarboxylic component and a diol component, and a layer (B layer) a main component of which is a thermoplastic resin (resin B) different from the resin A in optical properties; wherein at least one surface of the multi-layer structure unit has a refractive index of 1.68 or more and 1.80 or less, wherein the surface has a critical load of 15 mN or less at 100° C. in a scratch test, and wherein the multilayer film has at least one reflection bandwidth having a reflectance of 30% or more continuous over a wavelength width of 20 nm or more in a profile of reflectance measured on at least one surface side of the multi-layer structure unit.