CERAMIC METAL HALIDE LAMP
The invention relates to a high-pressure discharge lamp (1) of the ceramic metal halide type having a molybdenum coil (50) wrapped around the ceramic discharge vessel (20) and at least a portion (32, 42) of the electrode feed through means, and having power ranges of about 150W to about 1000W. The d...
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Main Authors | , , , , , , , , , |
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Format | Patent |
Language | English French |
Published |
14.11.2002
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a high-pressure discharge lamp (1) of the ceramic metal halide type having a molybdenum coil (50) wrapped around the ceramic discharge vessel (20) and at least a portion (32, 42) of the electrode feed through means, and having power ranges of about 150W to about 1000W. The discharge vessel (20) has a ceramic wall (22, 24, 25) and is closed by a ceramic plug (26, 27). An electrode (30, 40) which is located inside the discharge space (21) is connected to an electric conductor (12, 13) by way of a leadthrough element (32, 42). The leadthrough element (32, 42) projects through the ceramic plug (26, 27) with a close fit and is connected thereto in a gastight manner by way of a sealing ceramic (33, 43). The leadthrough element (32, 42) has a first part (34, 44) which is formed by a cermet at the area of the gastight connection. In addition, the lamps display one or more and most preferably all of the following properties: a CCT (correlated colur temperature) of about 3800 to about 4500K, a CRI (colur rendering index) of about 70 to about 95, a MPCD (mean perceptible colur difference) of about +/-10, and a luminous efficacy up to about 85-95 lumens/watt, a lumen maintenance of >80%, colur temperature shift <200K from 100 to 1000 hours, and lifetime of about 10,000 hours to about 25,000 hours. The invention also relates to design spaces for the design and construction of high power lamps.
The invention relates to a high-pressure discharge lamp of the ceramic metal halide type having a molybdenum coil wrapped around the ceramic discharge vessel and at least a portion of the electrode feed through means, and having power ranges of about 150W to about 1000W. The discharge vessel has a ceramic wall and is closed by a ceramic plug. An electrode which is located inside the discharge space is connected to an electric conductor by way of a leadthrough element. The leadthrough element projects through the ceramic plug with a close fit and is connected thereto in a gastight manner by way of a sealing ceramic. The leadthrough element has a first part which is formed by a cermet at the area of the gastight connection. In addition, the lamps display one or more and most preferably all of the following properties: a CCT (correlated color temperature) of about 3800 to about 4500K, a CRI (color rendering index) of about 70 to about 95, a MPCD (mean perceptible color difference) of about +/-10, and a luminous efficacy up to about 85-95 lumens/watt, a lumen maintenance of >80%, color temperature shift <200K from 100 to 8000, and lifetime of about 10,000 hours to about 25,000 hours. The invention also relates to design spaces for the design and construction of high power lamps.
La présente invention concerne une lampe à décharge haute pression de type céramique aux halogénures métalliques, comprenant une bobine de molybdène enroulée autour du tube de décharge céramique et d'au moins une portion du moyen d'amenée d'électrodes, et présentant des gammes de puissance comprises entre 150W environ et 1000W environ. Le tube de décharge présente une paroi céramique, il est fermé par un obturateur céramique. Une électrode placée à l'intérieur de l'espace de décharge est reliée à un conducteur électrique par l'intermédiaire d'un élément conducteur. L'élément conducteur se projette à travers l'obturateur céramique avec un ajustement serré et il est raccordé de manière étanche aux gaz par l'intermédiaire d'une céramique d'étanchéité. L'élément conducteur présente une première partie formée par une combinaison céramique-métal sur la zone de raccord étanche aux gaz. En outre, les lampes présentent une ou plusieurs propriétés, de préférence, toutes les propriétés suivantes: une température de couleur proximale comprise entre environ 3800 K et environ 4500 K, un indice de rendu des couleurs compris entre environ 70 et environ 95, une différence des couleurs perceptible moyenne) de plus ou moins 10, et une efficacité lumineuse pouvant atteindre environ 85 à 95 lumens/watt, un maintien du flux lumineux supérieur à 80 %, un décalage de température de couleur inférieur à 200K de 100 à 8000, et une durée de vie d'environ 10 000 heures à environ 25 000 heures. La présente invention concerne également des espaces de conception permettant la conception et la construction de lampes grande puissance. |
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Bibliography: | Application Number: WO2002IB01583 |