91 results about "Optical transition" patented technology

“Smart” controllers for windows having controllable optical transitions are described. Controllers with multiple features can sense and adapt to local environmental conditions. Controllers described herein can be integrated with a building management system (BMS) to greatly enhance the BMS's effectiveness at managing local environments in a building. The controllers may have one, two, three or more functions such as powering a smart window, determining the percent transmittance, size, and / or temperature of a smart window, providing wireless communication between the controller and a separate communication node, etc.

The invention relates to optical devices for producing and / or transforming polarised electromagnetic emission by means of anisotropic absorption and / or optical rotation effects and / or birefringence and can be used as different polarizers (dichroic, reflecting), lagging layers (retarders), liquid-crystal displays and indicators and also for producing polarising glass for building construction and for sun and antiglare glasses, masks, aprons and faceplates. The inventive optical device is based on at least one molecularly oriented layer of a low-molecular or oligomeric dichroic material which can form a stable lyotropic liquid crystal structure. The projection of at least one anisotropically absorbing fragment of a molecule of the dichroic material on the surface of the molecularly oriented layer of a dipole moment of optical transition is disposed in a parallel position to the optical axis of the molecularly oriented layer at least within several ranges of wavelength of the electromagnetic emission.

The invention relates to an organic electroluminescent technology and discloses a method for improving the luminous efficiency. The method can be applied to various types of OLED (Organic Light Emitting Diode) devices of bottom emission, top emission, transparency and the like. The invention provides an optical transition layer material, an optical substrate (packaging layer), an OLED, and manufacturing methods thereof. If the OLED is the bottom-emission OLED, an optical transition layer is manufactured on the substrate; if the OLED is the top-emission OLED, the optical transition layer is manufactured on the packaging layer; and if the OLED is the transparent OLED, the optical transition layer can be independently or simultaneously manufactured on the substrate or the packaging layer. An organic material main body with high light transmittance and moderate refractive index and an inorganic nano grain with the high light transmittance and low absorption rate are selected; the inorganic nano grain is used as a scattering medium to be scattered into the organic material main body to prepare the optical transition layer material; and the optical transition layer material is used for preparing an optical transition layer on the substrate (packaging layer) including glass and the like, so that the full-reflection loss of emergent light is effectively reduced and the luminous efficiency of the OLED is improved by 20-50%.

Semiconductor electrooptic medium shows behavior different from a medium based on quantum confined Stark Effect. A preferred embodiment has a type-II heterojunction, selected such, that, in zero electric field, an electron and a hole are localized on the opposite sides of the heterojunction having a negligible or very small overlap of the wave functions, and correspondingly, a zero or a very small exciton oscillator strength. Applying an electric field results in squeezing of the wave functions to the heterojunction which strongly increases the overlap of the electron and the hole wave functions, resulting in a strong increase of the exciton oscillator strength. Another embodiment of the novel electrooptic medium includes a heterojunction between a layer and a superlattice, wherein an electron and a hole in the zero electric field are localized on the opposite sides of the heterojunction, the latter being effectively a type-II heterojunction. Yet another embodiment has a heterojunction between two superlattices, wherein an electron and a hole in a zero electric field are localized on the opposite sides of the heterojunction, the latter operating effectively as a type-II heterojunction. A further embodiment has an ultrathin quantum well layer confined by barrier layers, having an essentially different barrier heights and a thick layer, wherein, in a zero electric field, a charged particle of one sign having a large effective mass is localized in this ultrathin layer, and a particle having a different sign of the charge, having a small effective mass is not localized in this ultrathin layer, but is localized mainly in the neighboring thick layer. Thus, the heterojunction between the two layers operates effectively as a type-II heterojunction. Applying an electric field to all types of the electrooptic medium of the present invention results in a dramatic increase of the exciton oscillator strength and, therefore, in a large positive refractive index change at the photon energies below the exciton absorption peak. A very strong increase in the optical transition photon energy can be achieved, when necessary.

A scintillator composition is described. The composition includes a matrix material in the form of a host lattice characterized by a 4f5d→4f optical transition under activation. The matrix material is based on certain lithium-lanthanide silicate compounds or alkali-lanthanide phosphate compounds. The composition also includes a praseodymium (Pr) activator for the matrix material. Radiation detectors which include crystal scintillators are also part of the present invention, as are methods for detecting high-energy radiation, using these devices.