An electronic device may have a housing surrounding an interior in which electrical components are mounted. A display may be mounted to housing structures in the device. The housing may have a rear wall. The display cover layer and rear wall of the housing may be formed from transparent glass layers. Coatings may be formed on inwardly facing surfaces of the transparent glass layers. A coating on a transparent glass layer may be formed from a thin-film interference filter having a stack of dielectric layers. The coating may include an ink layer on the thin-film interference filter. The transparent glass layers may have one or more textured surfaces that allow light at high angles to enter the transparent layers and reflect off the coatings at high angles, thereby adjusting optical properties of the coatings.

A device may include a multispectral filter array disposed on the substrate. The multispectral filter array may include a first metal mirror disposed on the substrate. The multispectral filter may include a spacer disposed on the first metal mirror. The spacer may include a set of layers. The spacer may include a second metal mirror disposed on the spacer. The second metal mirror may be aligned with two or more sensor elements of a set of sensor elements.

A filter array includes optical filters arranged in two dimensions. The optical filters include a first filter and a second filter. The first filter includes a first multimode filter having, within a target wavelength range, first peak wavelengths at each of which the optical transmittance is at a local maximum, and a first band-limiting filter having, as a limiting band, a first sub-wavelength range that is a part of the target wavelength range. The second filter includes a second multimode filter having, within the target wavelength range, second peak wavelengths at each of which the optical transmittance is at a local maximum, at least one of the second peak wavelengths being different from the first peak wavelengths, and a second band-limiting filter restricting transmission of light in a second sub-wavelength range that is a part of the target wavelength range and that is different from the first sub-wavelength range.

In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate, wherein the set of layers includes: a first subset of layers; and a second subset of layers; wherein: each of the first subset of layers comprises an aluminum nitride (AlN) material, a stress of each of the first subset of layers is between −1000 and 800 megapascals, the first subset of layers has a first refractive index with a first value, each of the second subset of layers comprises at least one other material, the second subset of layers has a second refractive index with a second value that is different than the first value, and the optical interference filter has an effective refractive index greater than or equal to 95% of a highest value of the first value and the second value.

A device for detecting electromagnetic radiation includes at least one thermal detector, placed on a substrate; an encapsulating structure forming a cavity housing the thermal detector, including at least one thin encapsulating layer; and at least one Fabry-Perot interference filter, formed by first and second semi-reflective mirrors that are separated from each other by a structured layer. A high-index layer of one of the semi-reflective mirrors is at least partially formed from the thin encapsulating layer.

A color conversion panel includes a substrate, a light blocking layer on the substrate, and color conversion layers and a transmission layer on the substrate, the color conversion layers including a quantum dot, wherein the light blocking layer includes a first sub-light blocking layer overlapping the color conversion layers and the transmission layer, and a second sub-light blocking layer between adjacent ones of the color conversion layers and the transmission layer, and wherein each of the first sub-light blocking layer and the second sub-light blocking layer includes an external light absorption layer on the substrate, and a reflection layer on the external light absorption layer.

Multilevel leaky-mode optical elements, including reflectors, polarizers, and beamsplitters. Some of the elements have a plurality of spatially modulated periodic layers coupled to a substrate. For infrared applications, the optical elements may have a bandwidth larger than 600 nanometers.

A direction-selective interferometric optical filter for spectrometric devices, at least includes an arrangement of two layered one-dimensional photonic structures. Each of the two structures contains a defect layer, and each photonic structure has a dispersion function in the energy momentum space (E, kx, ky), wherein kx and ky are momentum components of transmitted photons of the photonic structures for a defined energy (frequency/wavelength) E in the energy momentum space. Both photonic structures have opposite interfaces which are at a plane-parallel distance from one another. In this case, the dispersion functions of both photonic structures cross or intersect in the energy momentum space and produce a cut set of rays of waves on the surfaces of the dispersion functions at a particular energy, wherein a ray of waves contains waves selectively chosen through the filter at an angle, while other waves are reflected by the filter at other angles.

The present technology relates to a solid-state image capturing apparatus and an electronic device that can acquire a normal image and a narrow band image at the same time. The solid-state image capturing apparatus includes a plurality of substrates laminated in two or more layers, and two or more substrates of the plurality of substrates have pixels that perform photoelectric conversion. At least one substrate of the substrates having the pixels is a visible light sensor that receives visible light, and at least another substrate of the substrates having the pixels is a narrow band light sensor that includes narrow band filters being optical filters permeating light in a narrow wavelength band, and receives narrow band light in the narrow band.

An optical filter element for devices for converting spectral information into location information, uses a connected detector for detecting signals The element has at least two microresonators, each comprising at least two superposed reflective layer structures of a material layer having a high refractive index and a material layer having a low refractive index in an alternating sequence, and at least one superposed resonance layer arranged between the two superposed reflective layer structures. The filter element comprises at least one transparent plane-parallel substrate for optically decoupling the two microresonators; the first microresonator being located on a first of two opposing surfaces of said substrate, and the second microresonator being located on said substrate on a second surface thereof that lies opposite the first surface. The resonance layer of at least one microresonator, and/or the reflective layer structure that surrounds said resonance layer, has a layer thickness which can vary along a horizontal axis of said filter element.