摘要:
A metal halide lamp comprises a light-transmitting discharge vessel having a discharge space portion, a sealed portion, and a pair of electrodes projecting into the discharge space. The discharge vessel is constructed and arranged to have a D/L ratio being in a range of about 0.25 to about 1.5 and a t/L ratio being in a range of about 0.16 to about 1.1, wherein L is an interspace of tips of the electrodes, D is a maximum inner diameter of the discharge vessel, and t is a maximum wall thickness of the discharge space portion. An ionizable filling contains a rare gas and a metal halide including at least sodium (Na) or scandium (Sc) and does not substantially include mercury (Hg). Each of conductive wires is connected electrically to the electrodes extending from the discharge vessel. The metal halide lamp may be used for a metal halide lamp apparatus or a vehicle lighting apparatus.
摘要:
A metal halide lamp used for both of a vehicle headlight and an infrared night imaging vision apparatus, comprises a refractory and light-transmitting hermetic vessel, a pair of electrodes sealed in the hermetic vessel, and a discharge medium sealed in the hermetic vessel. The discharge medium contains a first halide containing at least one of sodium, scandium and a rare earth metal, a second halide which is a halide of a metal which emits light mainly in a near-infrared region of a wavelength of 780 to 800 nm, and a gas which emits light mainly in a near-infrared region of a wavelength of 820 to 1000 nm, and does not substantially contain mercury.
摘要:
To provide, in a special situation of a mercury-free lamp in which a luminance flicker tends to occur unlike a mercury-containing lamp, a metal halide lamp having an electrode structure modified so as to suppress the luminous flicker that is suitably used as an automotive headlamp, and an automotive headlamp apparatus incorporating the same. A metal halide lamp includes: a hermetic vessel 1 which is fire resistant and translucent; a pair of electrodes 3, 3 sealed in the hermetic vessel 1 with facing each other at a distant of 5 mm or less, the electrodes each having a shaft part 3a having a diameter of 0.25 mm or more and a tip 3b, which originates an arc, having a curved surface having a radius of one-half or less of the diameter of the shaft part; and a discharge medium essentially containing no mercury, sealed in the hermetic vessel 1, and containing halides of metals including a light-emitting metal in an amount of 0.005 mg/mm3 of an inner volume of the hermetic vessel or more and a xenon gas at 5 atmospheres or higher at a temperature of 25° C., in which the metal halide lamp is turned on with a lamp power of 60 W or lower in a stable state.
摘要翻译:为了在不含汞的灯的情况下提供不发生亮度闪烁的无汞灯的特殊情况,具有修改电极结构的金属卤化物灯,以抑制适合用作闪光灯的发光闪烁 汽车前照灯,以及包括其的汽车前照灯装置。 金属卤化物灯包括:密封容器1,其耐火和半透明; 密封在密封容器1中的一对电极3,3彼此面对距离为5mm或更小,每个电极具有直径为0.25mm以上的轴部3a和尖端3b,该部分起始于 弧形,具有半径为所述轴部的直径的一半以下的曲面; 和基本上不含汞的放电介质,密封在密封容器1中,并且含有包含密封容器的内容积的0.005mg / mm 3以上的发光金属的金属的卤化物或更多,以及 在25℃的温度下在5个大气压以上的氙气,其中金属卤化物灯在稳定状态下以60W或更低的灯功率打开。
摘要:
The present invention provides a high-pressure discharge lamp that uses substantially no mercury and reduces discharge flicker. The high-pressure discharge lamp is kept on with a lamp power of 50 W or lower in a stable state, and the temperature T (° C.) of the electrode at a point at a distance of 0.3 mm from the tip end to the base end in the stable state and the amount A (mol/cc) of free iodine produced when the lamp is turned off after 100 hours of on-time satisfy the formula (1):T2/A>1011.
摘要:
The present invention relates to a metal halide lamp substantially containing no mercury, a metal halide lamp lighting device using the same and an automotive headlamp apparatus using the same. And object of the invention is to provide such products in which a rapid rising of luminous flux is achieved. A metal halide lamp (MHL) according to the present invention has: a discharge vessel having an inner volume of C (cc) and having a pair of electrodes (2), (2) sealed in a hermetic vessel (1a) at opposite ends of a discharge space (1a) in the hermetic vessel (1a) at a distance of 5 mm or less; and a discharge medium containing xenon gas at 3 atmospheres or higher, a halide of sodium Na, and at least one of halides of scandium Sc and rare earth metals, the melting point of the halides being T (K), in which a lamp power in a stable state is 50 W or lower, and the formula (1) is satisfied: (H/C)×[R/(T/500)6]
摘要:
The present invention relates to a high-pressure discharge lamp, a high-pressure discharge lamp lighting device using the same and an automotive headlamp apparatus using the same, and an object of the invention is to use substantially no mercury and to reduce the discharge flicker. A high-pressure discharge lamp includes: a discharge vessel (1) having a hermetic vessel (1a) having a discharge space (1c) therein and a pair of electrodes (2), (2) hermetically provided at opposite ends of the discharge space (1c) in the hermetic vessel (1a) with facing each other at a distance of 5 mm or less; and a discharge medium substantially containing no Hg, sealed in the hermetic vessel (1a), and containing xenon gas at 3 atmospheres or higher and at least two of halides of light-emitting metals including iodides of Na, Sc and rare earth metals, in which the high-pressure discharge lamp is kept on with a lamp power of 50 W or lower in a stable state, and the temperature T (° C.) of the electrode (2) at a point at a distance of 0.3 mm from the tip end to the base end in the stable state and the amount A (mol/cc) of free iodine produced when the lamp is turned off after 100 hours of on-time satisfy the formula (1): T2/A>1011.
摘要:
A metal vapor discharge lamp whose near-infrared radiation is stronger than a conventional high-pressure discharge lamp, a projector utilizing this discharge lamp, and a metal vapor discharge lamp lighting device are disclosed. The metal vapor discharge lamp comprises a refractory light-transmitting hermetic vessel, a pair of electrode fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a halide and a rare gas. Most of the light irradiated when the discharge lamp is in the ON state has near-infrared wavelengths (750–1100 nm).
摘要:
A metal halide discharge lamp with which essentially permits disusing mercury is provided. The metal halide discharge lamp comprises a refractory and transparent hermetic vessel, a pair of electrodes fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a first halide, a second halide, and a rare gas. The first halide is a halide of metal which achieves a desired light emission. The second halide has a relatively high vapor pressure, being at least one halide of metal which is unlikely to emit a visible light compared with the metal of the first halide and acts as a buffer gas.
摘要:
A metal halide discharge lamp which essentially permits disusing mercury is provided. The metal halide discharge lamp comprises a refractory and transparent hermetic vessel, a pair of electrodes fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a first halide, a second halide, and a rare gas. The first halide is a halide of a metal which achieves a desired light emission. The second halide has a relatively high vapor pressure, being at least one halide of metal which is unlikely to emit a visible light compared with the metal of the first halide and acts as a buffer gas.
摘要:
A metal halide discharge lamp which essentially permits disusing mercury is provided. The metal halide discharge lamp comprises a refractory and transparent hermetic vessel, a pair of electrodes fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a first halide, a second halide, and a rare gas. The first halide is a halide of a metal which achieves a desired light emission. The second halide has a relatively high vapor pressure, being at least one halide of a metal which is unlikely to emit a visible light compared with the metal of the first halide and acts as a buffer gas.