A method for producing an optical apparatus includes providing a pair of glass wafers. One or more diffractive optical elements (DOEs) are formed on one or more of the glass wafers. A spacer is positioned between the glass wafers so as to define a cavity containing the DOEs, and a hermetic seal that bonds the glass wafers together and seals the cavity is formed.

A method for producing an optical apparatus includes providing a pair of glass wafers. One or more diffractive optical elements (DOEs) are formed on one or more of the glass wafers. A spacer is positioned between the glass wafers so as to define a cavity containing the DOEs, and a hermetic seal that bonds the glass wafers together and seals the cavity is formed.

The present disclosure provides a protective glass for a solar cell module having improved power generation efficiency of a solar cell obtained by minimizing reflection of light incident onto the protective glass, and a manufacturing method for the same. The protective glass for a solar cell module includes a plurality of glass beads formed in a spherical or hemispherical shape and arranged in the horizontal direction. The plurality of glass beads is disposed on at least one of the upper and lower portions of the sealing member. In addition, the method of manufacturing a protective glass for a solar cell module includes preparing a plurality of glass beads formed in a spherical or hemispherical shape, arranging the glass beads in a horizontal direction, and injecting a molten glass solution into the glass beads and forming the protective glass.

The present disclosure provides a protective glass for a solar cell module having improved power generation efficiency of a solar cell obtained by minimizing reflection of light incident onto the protective glass, and a manufacturing method for the same. The protective glass for a solar cell module includes a plurality of glass beads formed in a spherical or hemispherical shape and arranged in the horizontal direction. The plurality of glass beads is disposed on at least one of the upper and lower portions of the sealing member. In addition, the method of manufacturing a protective glass for a solar cell module includes preparing a plurality of glass beads formed in a spherical or hemispherical shape, arranging the glass beads in a horizontal direction, and injecting a molten glass solution into the glass beads and forming the protective glass.

The present invention is directed to a method for making infrared transmitting graded index optical elements by selecting at least two different infrared-transmitting materials, each with a different refractive index, having similar thermo-viscous behavior; assembling the infrared-transmitting materials into a stack comprising one or more layers of each infrared-transmitting material resulting in the stack having a graded index profile; and forming the stack into a desired shape. Also disclosed is the related optical element made by this method.

The present invention is directed to a method for making infrared transmitting graded index optical elements by selecting at least two different infrared-transmitting materials, each with a different refractive index, having similar thermo-viscous behavior; assembling the infrared-transmitting materials into a stack comprising one or more layers of each infrared-transmitting material resulting in the stack having a graded index profile; and forming the stack into a desired shape. Also disclosed is the related optical element made by this method.

Provided are a quantum dot glass cell and a light-emitting device package including the quantum dot glass cell. The quantum dot glass cell may include a quantum dot powder in which quantum dots, inorganic homogenizing particles, and a binder are mixed, a dispersion matrix in which the quantum dot powder is dispersed, and a glass sealing structure surrounding the dispersion matrix. The quantum dot glass cell and the light-emitting device package including the quantum dot glass cell may have improved light emission characteristics and improved reliability.

Provided are a quantum dot glass cell and a light-emitting device package including the quantum dot glass cell. The quantum dot glass cell may include a quantum dot powder in which quantum dots, inorganic homogenizing particles, and a binder are mixed, a dispersion matrix in which the quantum dot powder is dispersed, and a glass sealing structure surrounding the dispersion matrix. The quantum dot glass cell and the light-emitting device package including the quantum dot glass cell may have improved light emission characteristics and improved reliability.

A stress-engineered frangible structure includes multiple discrete glass members interconnected by inter-structure bonds to form a complex structural shape. Each glass member includes strengthened (i.e., by way of stress-engineering) glass material portions that are configured to transmit propagating fracture forces throughout the glass member. Each inter-structure bond includes a bonding member (e.g., glass-frit or adhesive) connected to weaker (e.g., untreated, unstrengthened, etched, or thinner) glass member region(s) disposed on one or both interconnected glass members that function to reliably transfer propagating fracture forces from one glass member to other glass member. An optional trigger mechanism generates an initial fracture force in a first (most-upstream) glass member, and the resulting propagating fracture forces are transferred by way of inter-structure bonds to all downstream glass members. One-way crack propagation is achieved by providing a weaker member region only on the downstream side of each inter-structure bond.

A stress-engineered frangible structure includes multiple discrete glass members interconnected by inter-structure bonds to form a complex structural shape. Each glass member includes strengthened (i.e., by way of stress-engineering) glass material portions that are configured to transmit propagating fracture forces throughout the glass member. Each inter-structure bond includes a bonding member (e.g., glass-frit or adhesive) connected to weaker (e.g., untreated, unstrengthened, etched, or thinner) glass member region(s) disposed on one or both interconnected glass members that function to reliably transfer propagating fracture forces from one glass member to other glass member. An optional trigger mechanism generates an initial fracture force in a first (most-upstream) glass member, and the resulting propagating fracture forces are transferred by way of inter-structure bonds to all downstream glass members. One-way crack propagation is achieved by providing a weaker member region only on the downstream side of each inter-structure bond.