The present invention relates to a system, method and computer-program for evaluating the photoluminescence of a photonic marker as well as to a photonic marker for temperature sensing and/or security marking and to the use of the photonic marker for temperature sensing and/or security marking. The photonic marker according to an aspect of the present invention comprises a host material selected from the group consisting of a rare earth element oxysulfide and strontium aluminate, wherein the host material is doped with Eu.sup.3+ or Eu.sup.2+ as a dopant.

Provided herein are phosphors of the general molecular formula:

A.sub.3-2xEu.sub.xMP.sub.3O.sub.9N,

wherein the variables are as defined herein. Methods of producing the phosphors are also provided. In some aspects, the present disclosure provides light-emitting devices comprising these phosphors.

The present application provides a photoexcitation-free temperature sensing material, a preparation method, and a temperature sensing method. The photoexcitation-free temperature sensing material has a general chemical formula of (Sr.sub.xM.sub.1-x).sub.1-y-zZnSO:Tb.sub.y,Eu.sub.z, wherein 0≤x≤1, 0<y<1, 0<z<1, and y+z<1; x, y, and z represent molar percentages; M represents a substitution ion of Sr and is one or two selected from Ca.sup.2+ and Ba.sup.2+.

A lighting device, comprising a glow material; a light source, positioned to illuminate the glow material when the light source is activated; and a light source controller, for sequencing sufficient on and off activation of the light source to maintain activate the glow material over a period of time.

A phosphorescent polycarbonate resin composition comprising, with respect to 100 parts by mass of a polycarbonate resin (A): 0.8 to 20 parts by mass of a red light-emitting phosphorescent material (B1) as a phosphorescent material (B), wherein an L* value measured in accordance with a following method (X) is 65 or more,

the method (X) including: under conditions of a cylinder temperature of 300° C., a mold temperature of 120° C., and a molding cycle of 45 seconds, measuring, with a color-difference meter, the L* of a 3 mm-thick portion of a specimen (in a form of a three-stage plate having a width of 50 mm, a length of 90 mm, and thicknesses of 1 mm, 2 mm, and 3 mm) obtained by injection molding of the phosphorescent polycarbonate resin composition, under following conditions based on JIS 28722:

Reflection measurement: D65 light source, 10-degree field of view

Measurement port: 30 ϕ

Specimen material holder: White

A dispersion of particles is provided that each contain at least one ferromagnetic domain and at least one phosphor domain having a stimulation wavelength, a glow persistence of at least 5 seconds and a visible wavelength emission. A polymeric resin that is transmissive of the stimulation wavelength and the visible wavelength emission coats the ferromagnetic and phosphor domains to define each particle size. A method of non-destructively inspecting a test article applies a dispersion of these particles to a surface of the test article. A magnetic field is then induced including the test article. The surface of the test article is exposed to incident energy adapted to stimulate phosphorescence of the dispersion of particles. With the incident energy exposure ceased, the position of the dispersion of particles on the surface of the test article is imaged. An inspection system for non-destructively inspecting a test article is also provided.

Provided herein are phosphors of the general molecular formula:
A.sub.3-2xEu.sub.xMP.sub.3O.sub.9N,
wherein the variables are as defined herein. Methods of producing the phosphors are also provided. In some aspects, the present disclosure provides light-emitting devices comprising these phosphors.

A light-emitting device including a solid-state light source that emits light having a peak wavelength in the range of 480 nm or less and a fluorescent film that covers the solid-state light source and includes at least one kind of phosphor, wherein the fluorescent film includes at least one kind of near-infrared phosphor that is excited by light from the solid-state light source, has a peak wavelength in the range exceeding 700 nm, and has an emission spectrum with a full width at half maximum of 100 nm or more in a range including the peak wavelength.

Examples of a monolithic phosphor composite for measuring a parameter of an object are disclosed. The ceramic metal oxide phosphor composite is used in an optical device for measuring the parameter of the measuring object. The device comprises a fiber optic probe with a light guide, a light source operatively coupled to the fiber optic probe to provide excitation light into the light guide, a monolithic ceramic metal oxide phosphor composite functionally coupled to a tip of the fiber optic probe, a sensor operatively coupled to the fiber optic probe to detect the emitted light and a processing unit functionally coupled to the sensor to process the emitted light. The monolithic ceramic metal oxide phosphor composite can be embedded in a notch made into the object or can be adhered to a surface of the object with a binder. When the monolithic ceramic metal oxide phosphor composite is illuminated with the excitation light it emits light in a wavelength different from the excitation light and a change in emission intensity at a single wavelength or the change in intensity ratio of two or more wavelengths, a shift in emission wavelength peak or a decay time of the phosphor luminescence is a function of the measuring parameter.

A light-emitting device including a solid-state light source that emits light having a peak wavelength in the range of 480 nm or less and a fluorescent film that covers the solid-state light source and includes at least one kind of phosphor, wherein the fluorescent film includes at least one kind of near-infrared phosphor that is excited by light from the solid-state light source, has a peak wavelength in the range exceeding 700 nm, and has an emission spectrum with a full width at half maximum of 100 nm or more in a range including the peak wavelength.