A method for producing an optic device, an optic device and an assembly including such an optic device are disclosed. In an embodiment, the method includes providing an active medium mechanically carried by a carrier body or included in the carrier body; applying an adhesive layer to at least one of the active medium or the carrier body, wherein the adhesive layer comprises at least one organic material and is applied by physical or chemical vapor phase deposition, and wherein a thickness of the adhesive layer is between 20 nm and 0.6 ?m inclusive.

A luminescent material is disclosed with emission in the near infrared wavelength range, the luminescent material including Sc.sub.1-x-yA.sub.yRE:Cr.sub.x, wherein MO=P.sub.3O.sub.9, BP.sub.3O.sub.12, SiP.sub.3O.sub.12; A=Lu, In, Yb, Tm, Y, Ga, Al, where 0?x?0.75, 0?y?0.9. A wavelength converting structure including the luminescent phosphor is also disclosed.

A nanocomposite includes: a matrix phase; and a functional area disposed in the matrix phase. The functional area contains monocrystal fine particles.

The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth.

The invention also relates to a lithium silicate glass and a lithium silicate glass ceramic which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.

The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a lithium silicate glass and a lithium silicate glass ceramic which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.

A process for synthesizing La1-a-bAaBbPO4 nanorods, A being chosen from Y, Sc, Ce, Pr, Nd, Pm, Sm, Gd, Tb and mixtures thereof, B being a luminescence-activating dopant chosen from Eu, Yb, Er, Tm, Dy, Ho and mixtures thereof, with 0a0.5 and 0b0.2 the process involving: a. the preparation of an acidic mother liquor having a pH of between 1.0 and 3.0 by mixing at least, or even by mixing only: a solvent, a first constituent providing La3+ ions, a second constituent, in excess, providing PO43 ions, if a>0, a third constituent providing A3+ ions, if b>0, a constituent providing luminescence-activating dopant ions B3+, in amounts such that, in the mother liquor, the ratio of the number of moles of PO43 ions to the number of moles of La3+ ions and, where appropriate, A3+ and/or B3+ ions is between 1.10 and 1.50, and b. heating the mother liquor under hydrothermal conditions at a heating temperature above 120 C. until La1-a-bAaBbPO4 nanorods of monazite crystallographic structure are obtained.

A phosphor for low-pressure discharge lamps is disclosed, wherein the phosphor is present in the form of phosphor grains coated with a protective layer, wherein the protective layer consists of a metal oxide, a metal borate, a metal phosphate or mixtures thereof.

A phosphor of a chemically stable inorganic luminescent material having a NASICON structure and an application product including the phosphor, such as a light-emitting device. A phosphor having the formula of A.sub.1+xB.sub.xC.sub.2xD.sub.3X.sub.12:AE.sub.y where A is one or two types of elements of monovalent metal cations, B is one or two types of elements of trivalent cations, C is one or two types of elements of tetravalent cations, D is one or two types of elements of pentavalent cations, X is one or two types of elements of N, O, F, P, S, O, Cl, and Br, AE is one or two types of elements of Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, Th, U, and Bi, 0x2, and 0y0.1.

Provided is a rare earth phosphovanadate phosphor that is excellent in emission characteristics and preferred also from the viewpoint of industrial production, and a production method thereof. The rare earth phosphovanadate phosphor includes at least a primary particle in which a linear uneven pattern including a plurality of ridge lines parallel to each other is formed on the surface of the particle. Further, the method for producing a rare earth phosphovanadate phosphor involves generating a mixture of a rare earth phosphovanadate phosphor and an alkali metal vanadate, and removing the alkali metal vanadate.

The invention relates to a method for the preparation of a lithium silicate glass or a lithium silicate glass ceramic which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth.

The invention also relates to a lithium silicate glass and a lithium silicate glass ceramic which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.