摘要:
An imaging apparatus is disclosed. The imaging apparatus comprises a multidimensional assembly that further comprises a plurality of x-ray sources that are individually addressable. The plurality of x-ray sources is further configurable to simultaneously emit x-ray spectra at different mean energies. Furthermore, the multi-dimensional assembly further comprises a plurality of x-ray detectors that are arranged to detect at least a part of the x-rays that are emitted from at least one of the x-ray sources.
摘要:
The present invention relates to the use of photonic band gap materials with phosphors incorporated. Photonic band gap materials play an important role for LEDs as light sources in applications where either a high radiance is desirable or LEDs are used in optical systems. The optical properties of current LEDs are such that the radiance is rather low and cannot be increased by standard means. It is an object of the invention to improve the radiance of light emitting devices by making use of photonic band gap materials with phosphors incorporated. According to the invention there is provided as structured material comprising a photonic structure that adjusts a range of photon frequencies, also referred to as photon density of states, in specific directions only, further comprising phosphor material having at least one emission mode for which the photon frequency is in the range adjusted by the photonic structure wherein the structured material has a symmetry lower than cubic such that the photonic structure adjusts the generation of photons emitted via said it least one emission mode of the phosphor material in less than three directions in this way increasing the radiance.
摘要:
A plasma picture screen provided with a luminescent layer which comprises a blue Eu2+-activated phosphor and a UV-C light emitting phosphor. The mixing of an UV-C light emitting phosphor with an Eu2+-activated phosphor or coating of an Eu2+-activated phosphor with a UV-C light emitting phosphor or coating of a base layer of an Eu2+-activated phosphor with a covering layer of a UV-C light emitting phosphor clearly reduces the photodegradation of the Eu2+-activated phosphors in the VUV range.
摘要:
A rare-gas low-pressure discharge lamp for generating ultraviolet light, in particular for cosmetic or therapeutic purposes, has a discharge vessel which is filled with rare gas and is at least partly transparent to UV light and which is at least partly coated with a phosphor which radiates UV light upon excitation by an excitation radiation produced in the discharge vessel so as to utilize a desired spectral range.
摘要:
A metal M is chosen from the group formed by yttrium, aluminum and lanthanum, and a watery solution of a complex of M and an organic chelating agent is added to a suspension of luminescent material, which causes a layer of M2O3 to be deposited on the luminescent material, which is them separated, dried and fired.
摘要翻译:金属M选自由钇,铝和镧形成的组,并且将M和有机螯合剂的络合物的水溶液加入到发光材料的悬浮液中,这使得一层M 2 O 3沉积在 它们分离,干燥和烧制。
摘要:
The invention describes a liquid crystal color picture screen with an improved luminous efficacy and an improved viewing angle. The liquid crystal color picture screen comprises a photoluminescent layer (7) which contains a dichroically absorbing color agent and an isotropically emitting color agent.
摘要:
A luminescent material is dispersed in a watery solution of sodium polyphosphate, a watery solution of a nitrate of the metal M is added, after which the luminescent material is separated, dried and fired. The metal is chosen from the group consisting of Ca, Sr, and Ba, whereby a protective layer of metal polyphosphate is formed on the luminescent material.