摘要:
An object is to provide a white light emitting lamp in which a BGR phosphor containing blue, green and red phosphor is combined with a semiconductor light emitting element such as an LED, a deep red phosphor having a main emission peak in a longer wavelength region than a main emission peak of the red phosphor is further added so as to enhance characteristics, whereby both high luminance and high color rendering properties can be obtained. This invention provides a white light emitting lamp 1 comprising: a semiconductor light emitting element 2 that is placed on a board 3 and emits ultraviolet light or blue light; and a light emitting portion that is formed so as to cover a light emitting surface of the semiconductor light emitting element 2, the light emitting portion containing a blue phosphor B, a green phosphor G, and a red phosphor R that are excited by the light emitted from the semiconductor light emitting element 2 to respectively emit blue light, green light, and red light, the white light emitting lamp 1 emitting white light by mixing light emission colors from the blue phosphor B, the green phosphor G, and the red phosphor R with one another, wherein the light emitting portion further contains a deep red phosphor DR having a main emission peak in a longer wavelength region than a main emission peak of the red phosphor.
摘要:
The invention relates to a high-pressure metal halide lamp, comprising an arc tube (1) comprising a metal halide containing discharge medium for supporting an electrical discharge, an outer envelope (15) surrounding said arc tube (1), and a phosphor coating (14) on the inner surface of said outer envelope (15), said phosphor coating comprising a blue emitting phosphor. Preferably, the blue emitting phoshor is selected from the group consisting of (Ba,Ca)1.29A112019,29:Eu, Sr5(P04)3CI:Eu, BaMgA110017:Eu, Si2A16011:Eu, BaA18013:Eu, Sr4A114025:Eu, and BaMgA110O17:Eu,Mn.
摘要:
A low-pressure mercury vapour discharge lamp having a satisfactory colour rendition (Ra > 80), a colour temperature of 2800 K or higher and a colour point on or near the Planckian locus. The lamp is provided with a luminescent layer (4) which comprises a. a luminescent rare earth metal metaborate activated by Ce and Mn and having a fundamental lattice Ln(Mg,Zn,Cd)B 5 O 10 , where Ln represents the elements Y, La and/or Gd, which borate exhibits red Mn emission, b. a luminescent material activated by Tb 3+ and having green Tb 3+ emission, c. at least one luminescent halophosphate of the group N hich comprises the calcium halophosphates emitting white ight, activated by Sb 3+ and Mn 2+ and having a colour temperature of at least 2900 K and blue-luminescing calcium halophosphate activated by Sb 3+ . The lamps yield a satisfactory rendition of deep red co- ours (R9 > 60) and have a high luminous flux and a high maintenance of the luminous flux during the life.
摘要:
A neutron measurement apparatus 1A includes a neutron detection unit 10, a photodetection unit 20 that detects scintillation light emitted from the neutron detection unit 10, a light guide optical system 15 that guides the scintillation light from the neutron detection unit 10 to the photodetection unit 20, and a shielding member 30 which is located between the neutron detection unit 10 and the photodetection unit 20 for shielding radiation passing in a direction toward the photodetection unit 20. Further, a scintillator formed of a lithium glass material in which PrF 3 is doped to a glass material 20Al(PO 3 ) 3 -8OLiF is used as a neutron detection scintillator composing the neutron detection unit 10. Thereby, the neutron detection scintillator and the neutron measurement apparatus which are capable of suitably performing neutron measurement such as measurement of scattered neutrons from an implosion plasma can be realized.
摘要:
A white light source I of an embodiment has color temperature of 2600 [K] or more and less than 3200 [K]. The white light source of the embodiment has a ratio of a minimum emission intensity to a maximum emission intensity in a wavelength region of from 450 to 610 [nm] on an emission spectrum of 0.16 or more and le than 0.35.
摘要:
An X-ray image tube capable of providing an image of a proper gray level enhanced in contrast without an increase in X-ray irradiation amount. An X-ray absorbed or scattered by an examination subject emits light at an entry surface formed on the inner side of an entry window (14), the emitted light is then converted into electrons on an photoelectric conversion surface, and electrons are accelerated and focused by a focusing electrode (19) and led toward an anode (20) side. Electrons led toward the anode (20) side are visualized by a phosphor (18) to display an image in an X-ray dose-dependent color on a glass sheet (17) with a brightness and a color according to the distribution of an incident X-ray.
摘要:
A fluorescent lamp has a coating on the interior surface of the glass envelope comprising an alkaline earth metal halophosphate phosphor and a quad-phosphor blend wherein the combination of phosphors result in a predetermined colour point from about 2700 to about 4200K on or near the Planckian locus where the alkaline earth metal halophosphate phosphor comprises a blend of halophosphate phosphors having a colour temperature substantially matching the colour temperature of the quadblend which includes an europium activated aluminate as a phosphor component.