Example embodiments relate to an optical shutter including a first polarization filter having a nanopore-cholesteric liquid crystal layer, which includes a cholesteric liquid crystal matrix and a plurality of liquid crystal nanopores embedded in the cholesteric liquid crystal matrix, and having a reflective wavelength band that varies according to electrical control, and a second polarization filter that is parallel to the first polarization filter, includes a nanopore-cholesteric liquid crystal layer, which includes a cholesteric liquid crystal matrix and a plurality of liquid crystal nanopores embedded in the cholesteric liquid crystal matrix, and has a reflective wavelength band that varies according to electrical control.

A thin film forming an intermediate layer for an optical article including liquid crystals, the thin film including a main body limited by a first main surface and by a second main surface opposed to the first main surface, the first and second main surfaces both including a first zone exhibiting alignment properties for aligning liquid crystals along a predetermined alignment direction and a second zone forming spacing structures extending in projection from the first zone.

Disclosed is a polarimetric-analysis-type dual liquid crystal (LC) wavelength filter module capable of miniaturization or optical integration in the form of a package. The polarimetric-analysis-type dual liquid crystal (LC) wavelength filter module includes a beam displacer disposed on a propagation path of light of an unpolarized light source for emitting unpolarized light and configured to generate two orthogonal polarization components corresponding to two polarization axes from the light of the unpolarized light source such that the polarization components are separated at a predetermined angle, a half-wavelength retarder disposed apart at a rear end of the beam displacer along the light propagation path, and a dual LC wavelength-tunable filter having two LC wavelength-tunable filters that overlap with a gap therebetween to detect light intensities of first polarized light of a Transverse Electric (TE) mode that is directly delivered from the beam displacer and second polarized light of the TE mode that is transmitted through or via the half-wavelength retarder and then converted.

The embodiments of the present disclosure relate to a Fabry-Perot cavity, a manufacturing method thereof, an interferometer and a measuring method for wavelength of light. The Fabry-Perot cavity includes two parallel substrates and a liquid crystal layer between the two parallel substrates, and a sealed cavity is defined between the two substrates; wherein the two substrates comprise a first substrate and a second substrate, light could enter through the first substrate and run out from the second substrate via the liquid crystal layer, and a deflection angle of the liquid crystal layer could be changed by applying various voltage between the two substrates.

An optical filter for attenuating a light source is provided. The optical filter includes first and second outer polarizers each configured to effectively polarize light in a first polarization axis. A first inner switchable polarizer is disposed between the first outer polarizer and the second outer polarizer. The first inner switchable polarizer is configured to alternate between a more polarizing state and a less polarizing state upon a change of an applied voltage. The first inner switchable polarizer configured to polarize light on a second polarization axis effectively orthogonal to the first polarization axis when the first inner switchable polarizer is in the more polarizing state. The change in applied voltage alters a transparency of the optical filter between a more transparent state and a less transparent state. The switchable polarizer may include a liquid crystal cell.

The present invention discloses a light valve device, an infrared display apparatus, dedicated spectacles and a system, to realize with naked eyes, only a black picture plane without any information can be seen on a display screen, but with spectacles, effective image information can be seen on the display screen; as a result, the image display is more concealed. The light valve device comprises a first liquid crystal cell and a second liquid crystal cell that are oppositely disposed to each other; the first liquid crystal cell and the second liquid crystal cell are both formed by two substrates that are oppositely arranged, and alignment films with parallel or antiparallel alignment directions are formed on the inside the two substrates respectively; cholesteric liquid crystals with opposite arrangement and rotation directions are filled in the first liquid crystal cell and the second liquid crystal cell respectively.

A light control device and a transparent display device including the same are discussed. In the light control device, a sealant uniformly spreads in a bonding process. The light control device includes a first substrate and a second substrate facing each other, a first electrode over one surface of the first substrate facing the second substrate, a second electrode over one surface of the second substrate facing the first substrate, a liquid crystal layer between the first electrode and the second electrode, a sealant sealing a plurality of liquid crystal cells between the first substrate and the second substrate, a first dam structure in a boundary between the sealant and the liquid crystal, and a second dam structure surrounding an outer side of the sealant. The liquid crystal layer transmits or blocks light, and the first dam structure surrounds an inner side of the sealant contacting the liquid crystal cells.

A system may include a light valve exposed to incident light from an external light source. The light valve may independently modulate multiple wavelength bands of the incident light that are transmitted through the light valve and into an environment that the system illuminates. A control system can operate the light valve to control a spectral distribution of light transmitted through the light valve.

Provided are a display device and a method of driving the same. The display device includes a polymer layer including dichroic dyes and a liquid crystal, which is not mixed or reacted with the polymer layer, dispersed in the polymer layer. The polymer and the liquid crystal having different refractive indices from each other are used to provide a display device which is reflective and transmissible.

A dual function camera is described for infrared and visible light imaging using electrically controlled filters. An example has an image sensor to image visible and infrared light, a lens system to image a scene onto the image sensor, and an electrically activated filter that selectively prevents visible light from the scene from impinging on the image sensor while capturing an infrared image.