摘要:
The invention relates to faceted gemstones based on a luminescent glass composition that contains particular oxides of rare earth metals and thus enables the faceted gemstones to be identified, and to a process for identifying the gemstones.
摘要:
The space glasses have a composition, in wt. % based on oxide content, including SiO2, 12-45; B2O3, 0-4; Al2O3, 0-4; TiO2, 0-5; PbO, 50-82; Na2O, 0-4; K2O, 0-8; and at least 0.1 wt. % of a total amount of at least three doping agents selected from CeO2, MoO3, Bi2O3, WO3, Ag2O, SnO2, Sb2O3 and As2O3. Light-weight and space-saving optical systems for outer space applications can be made with these space glasses, which have high UV- and VIS-transmittance and high transmittance stability, because of their high radiation resistance based on their dopant content. A preferred process for making the space glass includes melting the above-stated oxide ingredients in a quartz crucible at 1050° C. to 1200° C. to form a melt and refining the melt at 1230° C. to 1350° C.
摘要翻译:空间眼镜具有以重量计的组合物。 基于氧化物含量的%,包括SiO 2,12-45; B2O3,0-4; Al2O3,0-4; TiO2,0-5; PbO,50-82; Na2O,0-4; K2O,0-8; 和至少0.1wt。 总共含有选自CeO 2,MoO 3,Bi 2 O 3,WO 3,Ag 2 O,SnO 2,Sb 2 O 3和As 2 O 3中的至少3种掺杂剂的总量的%。 由于其基于其掺杂剂含量的高耐辐射性,可以利用这些具有高的UV和VIS透射率和高透射率稳定性的这些空间玻璃来制造用于外层空间的轻量和节省空间的光学系统。 用于制造空间玻璃的优选方法包括在1050℃至1200℃下在石英坩埚中熔化上述氧化物成分,以在1230℃至1350℃形成熔体并将熔体精炼。
摘要:
Holey optical fibers (e.g. photonic fibers, random-hole fibers) are fabricated with quantum dots disposed in the holes. The quantum dots can provide light amplification and sensing functions, for example. When used for sensing, the dots will experience altered optical properties (e.g. altered fluorescence or absorption wavelength) in response to certain chemicals, biological elements, radiation, high energy particles, electrical or magnetic fields, or thermal/mechanical deformations. Since the dots are disposed in the holes, the dots interact with the evanescent field of core-confined light. Quantum dots can be damaged by high heat, and so typically cannot be embedded within conventional silica optical fibers. In the present invention, dots can be carried into the holes by a solvent at room temperature. The present invention also includes solid glass fibers made of low melting point materials (e.g. phosphate glass, lead oxide glass) with embedded quantum dots.
摘要:
In general, in one aspect, the disclosure features a fiber waveguide having a waveguide axis, including a core extending along the waveguide axis and a confinement region extending along the waveguide axis surrounding the core. The confinement region includes a periodic structure along a radial direction extending from the waveguide axis and each period in the periodic structure includes a layer of a chalcogenide glass and a layer of a polymer.
摘要:
Holey optical fibers (e.g. photonic fibers, random-hole fibers) are fabricated with quantum dots disposed in the holes. The quantum dots can provide light amplification and sensing functions, for example. When used for sensing, the dots will experience altered optical properties (e.g. altered fluorescence or absorption wavelength) in response to certain chemicals, biological elements, radiation, high energy particles, electrical or magnetic fields, or thermal/mechanical deformations. Since the dots are disposed in the holes, the dots interact with the evanescent field of core-confined light. Quantum dots can be damaged by high heat, and so typically cannot be embedded within conventional silica optical fibers. In the present invention, dots can be carried into the holes by a solvent at room temperature. The present invention also includes solid glass fibers made of low melting point materials (e.g. phosphate glass, lead oxide glass) with embedded quantum dots.
摘要:
A system for backlighting of one of displays and screens including at least one light device and a light distribution unit. The at least one light device includes a glass body in the form of a hollow body with an inside and an outside. The light distribution unit containes at least one polymer. The glass body is made of a glass composition that is UV blocking and the glass body is at least partially transparent and has a transmission degree T
摘要:
High index-contrast fiber waveguides, materials for forming high index-contrast fiber waveguides, and applications of high index-contrast fiber waveguides are disclosed.
摘要:
An optical glass wherein an amount of change in refractive index (nulln: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.
摘要:
High index-contrast fiber waveguides, materials for forming high index-contrast fiber waveguides, and applications of high index-contrast fiber waveguides are disclosed.
摘要:
In an X-ray absorbing CRT bulb glass containing 10-40 weight % PbO and having an absorption coefficient not smaller than 40 cm−1 with respect to an X-ray having a wavelength of 0.6 angstrom, the glass contains 0.06-10 weight % Fe2O3 to thereby suppress lead from leaching into water in the atmosphere or in the ground where the CRT is wasted and dumped, so as to avoid the environmental pollution by the lead leached in the ground.