WO2012093664A1 - メタルハライドランプ - Google Patents
メタルハライドランプ Download PDFInfo
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- WO2012093664A1 WO2012093664A1 PCT/JP2012/050001 JP2012050001W WO2012093664A1 WO 2012093664 A1 WO2012093664 A1 WO 2012093664A1 JP 2012050001 W JP2012050001 W JP 2012050001W WO 2012093664 A1 WO2012093664 A1 WO 2012093664A1
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- iron
- amount
- halide
- range
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
- H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/827—Metal halide arc lamps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
Definitions
- the present invention relates to a metal halide lamp. More specifically, the present invention relates to a metal halide lamp for ultraviolet irradiation for photochemical reaction used in, for example, a drying process of ink or paint, a curing process of resin, and the like.
- metal halide lamps for ultraviolet irradiation have been used in various fields such as a printing process, a painting process, and a resin sealing process. Metal halide lamps used in these processes have been developed with higher illuminance in order to efficiently perform printing, painting, sealing, and the like in a short time.
- a high-pressure mercury lamp is the mainstream, but recently, a metal halide lamp having higher luminous efficiency in the ultraviolet region than a high-pressure mercury lamp is known.
- a metal is enclosed as a halogen compound in an arc tube, and emits a spectrum unique to the metal.
- Patent Document 1 encloses 0.1 ⁇ 10 ⁇ 6 to 1.0 ⁇ 10 ⁇ 6 grams of halogen per cc of the inner volume of the arc tube and 1/2 to 3 times the atomic ratio of the halogen to the halogen.
- the metal vapor discharge lamp is described (Claims).
- Patent Document 2 halogen, iron, and tin are enclosed together with a sufficient amount of mercury and an appropriate amount of rare gas to maintain arc discharge, and the amount of halogen enclosed is set to 1.0 ⁇ 10 ⁇ 5 per 1 cm 3 of arc tube volume. ⁇ 1.0 ⁇ 10 ⁇ 8 gram atoms, the total amount of iron and tin is 1/2 to 3 in terms of atomic ratio to halogen, and the amount of tin to iron is 1/20 to 3 in terms of atomic ratio.
- a metal vapor discharge lamp in which light energy is concentrated in an ultraviolet region of ⁇ 420 [nm] (Claims of Public Notice).
- Patent Document 3 in a metal vapor discharge lamp in which iron, tin, and halogen are sealed in addition to mercury and a rare gas in an arc tube, silver is added in addition to the iron, tin, and the iron, tin,
- the encapsulated amounts of silver and halogen are expressed in terms of grams and are [Fe], [Sn], [Ag] and [J], respectively, ([Fe] + [Sn]) / [J] ⁇ 0. 5 and (2 [Fe] +2 [Sn] + [Ag]) / [J]> 1 is described in the metal vapor discharge lamp (claims).
- Patent Document 4 discloses a metal vapor discharge lamp in which at least one metal selected from a group of mercury, rare gas, halogen, iron, cobalt, and nickel is enclosed in a luminous tube as a luminescent substance.
- the amount of encapsulated metal enclosed is A ⁇ D ⁇ V + B (A is the reciprocal of the valence of the encapsulated metal, D is the density of the encapsulated halogen, 1 ⁇ 10 ⁇ 5 to 1 ⁇ 10 ⁇ 8 mol / cm 3 , and V is the arc tube.
- A is the reciprocal of the valence of the encapsulated metal
- D is the density of the encapsulated halogen, 1 ⁇ 10 ⁇ 5 to 1 ⁇ 10 ⁇ 8 mol / cm 3
- V is the arc tube.
- Patent Document 5 aims to increase the emission intensity of 450 to 500 nm without reducing the starting performance in a metal vapor discharge lamp in which iron as a main light emitting metal element and iodine as a halogen are enclosed (summary, Paragraph 0008).
- Argon gas is sealed as a starting rare gas, and its partial pressure is set to 5 to 10 [torr] (summary, paragraph 0020).
- mercury as a buffer gas
- iron as a luminescent metal
- iodine and bromine as halogen and a rare gas for start-up are enclosed
- iodine is (I) for the number of encapsulated atoms converted per arc tube volume.
- Patent Document 1 is merely a description of a metal vapor discharge lamp in which a predetermined amount of halogen and iron of 1/2 to 3 times the atomic ratio to the halogen are enclosed.
- Patent Document 2 is merely a description of a metal vapor discharge lamp in which a predetermined amount of halogen and the total amount of iron and tin are 1/2 to 3 in atomic ratio with respect to halogen.
- Patent Document 3 encloses iron, tin, silver, and halogen in a lamp. Furthermore, the amount of iron, tin, silver and halogen is specified.
- Patent Document 4 is merely a description of a discharge lamp in which the amount of encapsulated metal other than mercury is defined in relation to halogen.
- Patent Document 5 aims to increase the emission intensity of 450 to 500 [nm], focusing on the starting performance.
- the starter rare gas argon is set to a low pressure in the range of 5 to 10 [torr] to offset the deterioration of the startability.
- the wavelength and the rare gas pressure are different from those of the present embodiment described below. Further, focusing on the iron content, in Example 1, (Fe) is 6 ⁇ 10 ⁇ 7 [mol / cc], (Sn) is 2 ⁇ 10 ⁇ 7 [mol / cc], (I) + (Br ) Is 8 ⁇ 10 ⁇ 7 [mol / cc]. From this value, it is clear that both (Fe) and (Sn) exist as iron halides and tin halides.
- the present invention is directed to a metal halide lamp for ultraviolet irradiation for photochemical reaction used in ink and paint drying processes, resin curing processes, and the like.
- a spectrum having a wavelength of 100 to 400 [nm] is referred to as an ultraviolet ray.
- an ultraviolet ray having a spectrum of a wavelength of 350 to 380 [nm] (hereinafter referred to as a wavelength around 365 [nm] is taken as a central wavelength). It is also intended for metal halide lamps that emit intense light.
- Patent Document 1 a predetermined amount of halogen and an atomic ratio to the halogen of 1/2 to 3 are used. A metal vapor discharge lamp with double iron is proposed. Further, in Patent Document 2, a metal vapor in which the total amount of iron and tin is 1/2 to 3 in terms of an atomic ratio with respect to a predetermined amount of halogen and the amount of tin to iron is 1/20 to 3 in terms of an atomic ratio. A discharge lamp is proposed.
- an object of the present invention is to provide a novel metal halide lamp for ultraviolet irradiation with enhanced emission of ultraviolet light having a wavelength of around 365 [nm].
- the metal halide lamp according to the present invention is a metal halide lamp that mainly emits ultraviolet rays, and the lamp emits a strong spectrum particularly in the wavelength of 350 to 380 [nm] of ultraviolet rays, in order to emit at least mercury and a rare gas.
- the iron comprises a iron iodide as iron halide (FeX 2) (FeI 2) and iron bromide (FeBr 2), and a metallic iron (Fe), the
- FeX 2 iron halide
- FeBr 2 iron bromide
- the metal iron The amount A of (Fe) is in the range of 0.5 (B + C) ⁇ A ⁇ 10.0 (B + C) [mol / cm 3 ], and the amount of iron halide (FeX 2 ) (B + C) is 1 .0 ⁇ 10 -7 ⁇ (B + C) ⁇ 4.5 ⁇ 10 -7 in the range of mol / cm 3], ferric bromide in iron halide (FeX 2) the ratio of (FeBr 2) ⁇ C / ( B + C) ⁇ is, ⁇ C
- the amount A of metallic iron (Fe) is in the range of 0.5 (B + C) ⁇ A ⁇ 3.0 (B + C) [mol / cm 3 ]
- the iron halide (FeX 2 ) is in the range of 2.0 ⁇ 10 ⁇ 7 ⁇ (B + C) ⁇ 3.5 ⁇ 10 ⁇ 7 [mol / cm 3 ]
- argon (Ar) 2.0 [kPa] may be further sealed as the rare gas.
- the lamp contains at least mercury and iron together with a rare gas in order to emit a strong spectrum of ultraviolet rays, particularly at a wavelength of 350 to 380 [nm]. cage, wherein the iron to be encapsulated includes a iron iodide as iron halide (FeX 2) (FeI 2) and iron bromide (FeBr 2), and a metallic iron (Fe), the amount to be encapsulated A: the amount of metal iron (Fe) enclosed, B: the amount of iron iodide (FeI 2 ) enclosed, and C: the amount of iron bromide (FeBr 2 ) enclosed, respectively.
- FeX 2 iron halide
- FeBr 2 iron bromide
- the present invention it is possible to provide a novel metal halide lamp for ultraviolet irradiation with enhanced emission of ultraviolet rays in the vicinity of a wavelength of 365 [nm]. Further, if this lamp is used, light necessary for the photochemical reaction can be efficiently irradiated onto the liquid crystal material substance, and a liquid crystal panel with higher performance than before can be manufactured.
- FIG. 1 is a schematic cross-sectional view of a metal halide lamp according to this embodiment.
- FIG. 2 is a graph showing the illuminance maintenance rate of each lamp in an experiment for determining the amount A of iron (Fe), which is a preferable metal as a luminescent material, in the first stage.
- FIG. 3 is a graph showing the measurement results of the illuminance of each lamp in an experiment for determining the amount (B + C) of iron halide (FeX 2 ) that is preferable as the luminescent substance in the second stage.
- FIG. 1 is a schematic cross-sectional view of a metal halide lamp according to this embodiment.
- FIG. 2 is a graph showing the illuminance maintenance rate of each lamp in an experiment for determining the amount A of iron (Fe), which is a preferable metal as a luminescent material, in the first stage.
- FIG. 3 is a graph showing the measurement results of the illuminance of each lamp in an experiment for determining the amount
- FIG. 4 shows a preferred ratio ⁇ C / (B + C) ⁇ of iron iodide (B) and iron bromide (C) constituting iron halide (FeX 2 ) (B + C) preferable as a luminescent material in the third stage. It is a graph of the illuminance maintenance rate of each lamp in the experiment to be obtained.
- FIG. 5 is a flowchart illustrating a method for manufacturing the lamp shown in FIG.
- FIG. 1 is a schematic cross-sectional view of the metal halide lamp 10, which includes a pair of electrodes 2, 2 inside a quartz arc tube 1, each electrode being tungsten (W) or thorium oxide of about 2%.
- An electrode tip 2a is formed by winding a tungsten wire several times in a coil shape around an electrode mandrel made of a doped tungsten containing tantalum or an oxide doped tungsten doped with a rare earth oxide.
- the electrodes 2 and 2 are connected to external lead wires through molybdenum foils 3 and 3, respectively.
- the shape of the arc tube 1 is a straight tube type, the inner diameter of the lamp tube is 20 mm, the distance between electrodes (light emission length) is 250 mm, and the rare gas is argon (Ar) 2.0 [kPa] (equivalent to about 15 [torr]). It is enclosed.
- the luminescent substance enclosed in the arc tube will be described below.
- composition of luminescent material The composition of the luminescent material sealed in the lamp shown in FIG. 1 will be described.
- metallic iron (Fe) and iron halide (FeX 2 ) are used as the luminescent material.
- FeX 2 is composed of a mixture of iron iodide (FeI 2 ) and iron bromide (FeBr 2 ).
- Table 1 shows data relating to each lamp in which the amount of iron halide (FeX 2 ) enclosed (B + C) is constant and the amount of metal iron (Fe) A in the encapsulated material is varied.
- the lamp used in the experiment is the lamp shown in FIG. In addition, sample No. In order to avoid duplication with other experimental samples, numbers in the 10s are assigned.
- the enclosed amount (B + C) of iron halide (FeX 2 ) is kept constant at 3.1 ⁇ 10 ⁇ 7 [mol / cm 3 ], and the enclosed amount A of metallic iron (Fe) is set to zero to 46 ⁇ 10 ⁇ 7. [Mol / cm 3 ] and 6 types of sample Nos. 11 to 16 were prepared.
- FIG. 2 is a graph of this illuminance maintenance rate.
- the life of metal halide lamps is said to be nominally about 1,500 hours.
- the sample No. 1 maintained 80% or more of the initial illuminance after 1,500 hours. 14, 13, and 15. Sample No. 16, 12, and 11 have fallen to less than 80% of the initial illuminance.
- Sample No. 12 is a sample with the least amount of metallic iron (Fe) A.
- Sample No. Reference numeral 16 denotes a sample having the largest amount of metallic iron (Fe) A.
- the amount of iron Fe of 16 metals corresponds to 15 times the amount of iron halide FeX 2 (B + C). Under a high temperature environment, it is considered that excess metal iron reacts with a tungsten (W) electrode, the electrode itself is damaged over time, arc discharge is inhibited, and illuminance deteriorates.
- W tungsten
- a preferable lamp is a lamp that maintains 80% or more of the original illuminance when 1,500 hours have elapsed.
- the ratio of the metal iron (Fe) encapsulation amount A to the iron halide FeX 2 encapsulation amount (B + C) is shown in Sample No. A / (B + C) corresponding to 13, 14, and 15 is preferably in the range of 0.5 to 10.0.
- A it is preferably in the range of 0.5 (B + C) ⁇ A ⁇ 10.0 (B + C) [mol / cm 3 ].
- a / (B + C) corresponding to 13, 14 is more preferably in the range of 0.5 to 3.0. In terms of A (amount of metallic iron), it is within the range of 0.5 (B + C) ⁇ A ⁇ 3.0 (B + C) [mol / cm 3 ].
- the value selected as A is sample No. 1 within the preferred range in the first stage. It is an average value of 13, 14, and 15.
- sample No. in Table 2 In order to avoid duplication with other experimental samples, numbers from 20 to 30 are assigned.
- Sample No. Nos. 21 to 24 use only iron iodide (B alone) as iron halide (FeX 2 ) and no iron bromide (FeBr 2 ).
- Sample No. Nos. 25 to 31 use a mixture of iron iodide and iron bromide (B + C) as the iron halide.
- the illuminance was measured with an illuminometer for wavelength 365 [nm].
- the measurement data is sample no.
- the illuminance of 21 is 100 [%], and other measurement data are displayed as relative values.
- FIG. 3 is a graph illustrating the measurement result of the illuminance.
- the illuminance of (B alone) is the sample No. in which the amount of iron iodide increases. Illuminance is improved from 21 to 23. However, Sample No. with a further increased amount of iron iodide. On the other hand, in 23 to 24, the illuminance decreases.
- the illuminance of (B + C) is sample No. in which the amount of iron halide increases. The illuminance is improved from 25 to 28. However, Sample No. with a further increased amount of iron halide. On the other hand, in 28 to 31, the illuminance gradually decreases. As described above, in both (B alone) and (B + C), the illuminance was improved with an increase in the amount of iron halide, reached a peak at a certain amount, and when it further increased, the illuminance tended to decrease.
- iron is a luminescent material. Therefore, sample no. 21-23 and no. From 25 to 28, it is considered that the illuminance is improved with an increase in iron halide (FeX 2 ). On the other hand, sample No. 23-24 and No. In 28 to 31, the illuminance gradually decreases as the amount of iron halide increases. This is probably because the illuminance peak deviated from the wavelength 365 [nm] and moved to another wavelength.
- the iron iodide constituting the iron halide (B + C) is within the range of the amount of iron A found in the first stage and within the range of the amount of iron halide (B + C) found in the second stage.
- a and (B + C) are within the range found in the first stage and the second stage.
- the ratio of C to (B + C), ⁇ C / (B + C) ⁇ was changed for each lamp.
- the iron content of metallic iron (Fe) and iron halide (FeX 2 ) is enclosed in order to improve the illuminance.
- metallic iron and iron halide react with the tungsten (W) electrode. Accordingly, the ratio of the amount of iron bromide to the preferable amount of iron halide ⁇ C / (B + C) ⁇ was evaluated from both the viewpoints of lamp illuminance and illuminance maintenance rate.
- the lamp used in the experiment is the lamp shown in FIG. In Table 1 of FIG. 1 and FIG. 2 (examination on metallic iron Fe), A is within the range of 0.5 (B + C) ⁇ A ⁇ 10.0 (B + C) [mol / cm 3 ]. It turned out to be preferable. Further, in the second stage Table 2 and FIG. 3 (amount of iron halide FeX 2 ), (B + C) is 1.0 ⁇ 10 ⁇ 7 ⁇ (B + C) ⁇ 4.5 ⁇ 10 ⁇ 7 [ mol / cm 3 ]. In the third stage, the amount A of metallic iron is 9.1 ⁇ 10 ⁇ 7 [mol / cm 3 ], which is constant within the range obtained in the first stage.
- the amount of iron halide (B + C) is also made substantially constant within the range obtained in the second stage, 3.0 ⁇ 10 ⁇ 7 to 3.2 ⁇ 10 ⁇ 7 [mol / cm 3 ].
- Table 3 the data enclosed by the squares of the A column and the (B + C) column are applicable.
- the illuminance data was measured with an illuminometer for wavelength 365 [nm].
- the illuminance data is sample No. including no C.
- the illuminance of 41 is 100%, and the illuminance of each lamp is displayed as a relative value.
- the initial illuminance is sample no. It is preferable that a significant difference is observed with respect to 41, that is, the illuminance is improved by 10% or more. For this condition, sample no. Excluding sample No. 42, sample no. 43 to 48 corresponded. From these samples, it was found that the ratio of the amount of iron bromide to the amount of iron halide is preferably approximately in the range of ⁇ C / (B + C) ⁇ ⁇ 5 [%].
- FIG. 4 is a graph of this illuminance maintenance rate.
- a lamp that is preferable from the viewpoint of maintaining the illuminance of the lamp is a lamp that maintains 80% or more of the initial illuminance when 1,500 hours have elapsed.
- sample No. that maintains 80% or more of the initial illuminance even after 2,000 hours have elapsed. 44, 45, 43 and 46 are more preferable. From Table 3, No. It has been found that it is more preferable if it is within the range of ⁇ C / (B + C) ⁇ of 43 to 46 5 to 60 [%].
- iron halide When the iron halide is composed only of iron iodide (B alone), it is inferior in terms of both the initial illuminance and the illuminance maintenance rate compared to the case where it is composed of a mixture of iron iodide and iron bromide (B + C). Turned out to be. Furthermore, it has been found that by increasing the amount of iron bromide to a certain amount, good results can be obtained in both illuminance and illuminance maintenance ratio.
- the ratio of excess iron bromide in iron halide has a high it is relatively reactive ferric bromide (FeBr 2) as compared with iron iodide (FeI 2), and tungsten (W) electrode reaction This is likely to result in a decrease in illuminance maintenance rate.
- step S1 the quartz tube (reference numeral 1 in FIG. 1) is processed into a desired shape.
- a quartz tube serving as an electrode fixing portion is connected to both ends of the central quartz tube 1 serving as a light emitting portion.
- a thin tube (exhaust pipe) serving both as a filling passage for the inclusion and an exhaust passage inside the quartz tube is fusion-connected to the quartz tube at right angles (not shown).
- the electrode is enclosed in the envelope and evacuated to vacuum, and then an inert gas such as argon at a low pressure is enclosed.
- a halide having a predetermined composition and metal iron, other mercury and a rare gas (such as argon) described below are sealed, and the exhaust tube is sealed. Tip off and seal.
- high purity iron reagent is used for metallic iron.
- the iron and iron halide to be encapsulated at this stage are in the range of 0.5 (B + C) ⁇ A ⁇ 10.0 (B + C) [mol / cm 3 ] in the amount A of metallic iron in the first stage described above.
- the amount of iron halide (B + C) is determined within the range of 1.0 ⁇ 10 ⁇ 7 ⁇ (B + C) ⁇ 4.5 ⁇ 10 ⁇ 7 [mol / cm 3 ].
- step S5 the base is fixed to both ends of the quartz tube 1.
- it is in the range of 1.0 ⁇ 10 ⁇ 7 ⁇ (B + C) ⁇ 4.5 ⁇ 10 ⁇ 7 [mol / cm 3 ]. More preferably, it is in the range of 2.0 ⁇ 10 ⁇ 7 ⁇ (B + C) ⁇ 3.5 ⁇ 10 ⁇ 7 [mol / cm 3 ].
- the initial illuminance is high especially at wavelengths of 350 to 380 [nm], and the illuminance is maintained. It has become possible to manufacture a metal halide lamp for ultraviolet irradiation for photochemical reaction, which has a high rate.
- this wavelength range is the most effective wavelength range for photochemical reaction for forming liquid crystal alignment, so that the liquid crystal material material can be efficiently irradiated with light, and a liquid crystal panel capable of realizing a higher definition image than before. It became possible to manufacture.
- the range of the preferable amount of metallic iron A is obtained in the first stage, and the preferable amount of iron halide (B + C) is obtained in the second stage under the conditions of A obtained in the first stage.
- the ratio of the amount C of iron bromide to the preferred iron halide (B + C) ⁇ C / (B + C) ⁇ was determined.
- the scope of the present invention is not limited to this determination order.
- (B + C) is determined first in time, and ⁇ C / (B + C) ⁇ is determined later.
- the determination of the range of A or the determination of the range of (B + C) may be made first.
- the present applicant has proposed a metal vapor discharge lamp in which a predetermined amount of halogen and “iron” having an atomic ratio of 1/2 to 3 times the halogen are enclosed. Based on this experience, in the first stage, the preferable amount (B + C) can be determined by setting the amount of iron A to a constant amount.
- Second order of determination (first stage) A is a fixed amount, the range of (B + C) is determined, (Second stage) (B + C) is set to a certain amount, the range of A is determined, (Third stage) A and (B + C) are set to constant amounts, and the range of ⁇ C / (B + C) ⁇ is determined.
- Third order of determination (first stage) A is a fixed amount, the range of (B + C) is determined, (Second stage) A and (B + C) are set to constant amounts, respectively, and a range of ⁇ C / (B + C) ⁇ is determined. (Third stage) (B + C) and ⁇ C / (B + C) ⁇ are set to constant amounts, and the range of A is determined.
- arc tube 1: arc tube, 2: electrode, 2a: electrode tip, 3: molybdenum foil, 10: metal halide lamp, A: amount of metal iron (Fe) enclosed, B: amount of iron iodide (FeI 2 ) enclosed, C: amount of iron bromide (FeBr 2 ) enclosed,
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Abstract
Description
対象となるメタルハライドランプの形状等の物理的寸法は、特許文献4に開示するランプと同じである。図1は、このメタルハライドランプ10の断面模式図であり、石英製の発光管1の内部に一対の電極2,2を備え、各電極は、タングステン(W)又は2〔%〕程度の酸化トリウムを含有するトリエーテッドタングステンあるいは希土類酸化物をドープした酸化物ドープドタングステンから成る電極心棒の周りにタングステン線をコイル状に数回巻いた電極先端部2aを夫々形成している。各電極2,2は、モリブデン箔3,3を介して夫々外部リード線につながっている。発光管1の形状は、直管型であり、ランプ管内径は20mm、電極間距離(発光長)250mm、希ガスとしてアルゴン(Ar)2.0〔kPa〕(約15〔torr〕相当)が封入されている。発光管内に封入される発光物質に関しては、以下に説明する。
図1に示したランプに封入される発光物質の組成について説明する。発光物質として、金属の鉄(Fe)とハロゲン化鉄(FeX2)を使用する。FeX2は、ヨウ化鉄(FeI2)と臭化鉄(FeBr2)の混合物で構成する。
第1段階で、発光物質として、好ましい金属の鉄(Fe)の量Aを求める実験を行った。具体的には、発光物質の鉄分=金属の鉄(Fe)+ハロゲン化鉄(FeX2)=A+(B+C)、において、ハロゲン化鉄の量(B+C)を一定にして、金属の鉄の量Aを、ゼロ~(B+C)の15倍の間で変化させた複数個のランプを製造して評価した。アーク安定剤として少量のヨウ化錫(SnI2)を使用している。ハロゲン化鉄は、高温環境下では、タングステン(W)電極と激しく反応する。同様に、金属の鉄も、高温環境下では、タングステン(W)電極と反応する。従って、好ましい金属の鉄の量Aの評価は、ランプ照度の経時劣化特性を求めて行った。
第1段階で、A(金属の鉄の量)の好ましい範囲が判明した。第2段階では、第1段階の鉄の量Aの範囲内で、発光物質として好ましいハロゲン化鉄(FeX2)の量(B+C)を求める実験を行った。
第1段階で、金属鉄の量Aの好ましい範囲が判明した。第2段階で、ハロゲン化鉄の量(B+C)の好ましい範囲が判明した。
このメタルハライドランプの製造方法は、図5に示す通りである。
(1) 第1段階の実験を通して、封入物質として、発光物質である鉄分に関して、好ましい金属の鉄(Fe)の量Aを求めることが出来た。好ましくは、0.5(B+C)≦A≦10.0(B+C)〔mol/cm3〕の範囲である。更に好ましくは、0.5(B+C)≦A≦3.0(B+C)〔mol/cm3〕の範囲である。
以上、本発明に係るメタルハライドランプの実施形態について説明したが、これらは例示であって、本発明を限定するものではない。本実施形態に対して当業者が容易に成し得る追加・削除・変更・改良等は本発明の範囲内である。
(第1段階)Aを一定量にし、(B+C)の範囲を決定し、
(第2段階)(B+C)を一定量にし、Aの範囲を決定し、
(第3段階)A及び(B+C)を夫々一定量にし、{C/(B+C)}の範囲を決定する。
(第1段階)Aを一定量にし、(B+C)の範囲を決定し、
(第2段階)A及び(B+C)を夫々一定量にし、{C/(B+C)}の範囲を決定し、
(第3段階)(B+C)及び{C/(B+C)}を夫々一定量にし、Aの範囲を決定する。
A:金属の鉄(Fe)の封入量、 B:ヨウ化鉄(FeI2)の封入量、 C:臭化鉄(FeBr2)の封入量、
Claims (4)
- 主に紫外線を発光するメタルハライドランプに於いて、
前記ランプは、紫外線の特に波長350~380〔nm〕に強いスペクトルを発光させるために、希ガスと共に、少なくとも、水銀と鉄分とが封入されており、
前記鉄分は、ハロゲン化鉄(FeX2)としてのヨウ化鉄(FeI2)及び臭化鉄(FeBr2)と、金属の鉄(Fe)とを含み、
前記鉄分の量を、A:金属の鉄(Fe)の封入量、B:ヨウ化鉄(FeI2)の封入量、C:臭化鉄(FeBr2)の封入量として夫々表現すると、
金属の鉄(Fe)の量Aは、0.5(B+C)≦A≦10.0(B+C)〔mol/cm3〕の範囲内にあり、
ハロゲン化鉄(FeX2)の量(B+C)は、1.0×10-7≦(B+C)≦4.5×10-7〔mol/cm3〕の範囲内にあり、
ハロゲン化鉄(FeX2)における臭化鉄(FeBr2)の比率{C/(B+C)}は、{C/(B+C)}=5~70〔%〕の範囲内にある、メタルハライドランプ。 - 請求項1に記載のメタルハライドランプに於いて、
金属の鉄(Fe)の量Aは、0.5(B+C)≦A≦3.0(B+C)〔mol/cm3〕の範囲内にあり、
ハロゲン化鉄(FeX2)の量(B+C)は、2.0×10-7≦(B+C)≦3.5×10-7〔mol/cm3〕の範囲内にあり、
ハロゲン化鉄(FeX2)における臭化鉄(FeBr2)の比率{C/(B+C)}は、{C/(B+C)}=5~60〔%〕の範囲内にある、メタルハライドランプ。 - 請求項1又は2に記載のメタルハライドランプに於いて、更に、
前記希ガスとしてアルゴン(Ar)2.0〔kPa〕が封入されている、メタルハライドランプ。 - メタルハライドランプの製造方法において、
前記ランプは、紫外線の特に波長350~380〔nm〕に強いスペクトルを発光させるために、希ガスと共に、少なくとも、水銀と鉄分とが封入されており、
封入される前記鉄分は、ハロゲン化鉄(FeX2)としてのヨウ化鉄(FeI2)及び臭化鉄(FeBr2)と、金属の鉄(Fe)とを含み、
発光物質の組成を決定する工程で、封入される量を、A:金属の鉄(Fe)の封入量、B:ヨウ化鉄(FeI2)の封入量、C:臭化鉄(FeBr2)の封入量として夫々表現すると、金属の鉄(Fe)の量Aを、0.5(B+C)≦A≦10.0(B+C)〔mol/cm3〕の範囲内で決定し、ハロゲン化鉄(FeX2)の量(B+C)を、1.0×10-7≦(B+C)≦4.5×10-7〔mol/cm3〕の範囲内で決定し、ハロゲン化鉄(FeX2)における臭化鉄(FeBr2)の比率{C/(B+C)}を、{C/(B+C)}=5~70〔%〕の範囲内で決定し、
封体加工工程で、石英管を所定の形状に加工し、発光部となる中央部の石英管両端に電極固定部となる石英管を接続し、
シール、溶封工程で、前記石英管に電極を固定し、
排気工程で、前記石英管の中を排気した後、前記発光物質の組成を決定する工程で決定したハロゲン化物及び金属の鉄、その他の水銀及び希ガス(アルゴン等)等を封入して排気部を封じ、
仕上げ工程で、前記石英管の両端にベースを固定する、メタルハライドランプの製造方法。
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CN201280001170.0A CN102859641B (zh) | 2011-01-06 | 2012-01-02 | 金属卤化物灯 |
DE112012000416T DE112012000416T5 (de) | 2011-01-06 | 2012-01-02 | Metallhalogenidlampe |
US13/978,223 US8749138B2 (en) | 2011-01-06 | 2012-01-02 | Metal halide lamp |
KR1020127023135A KR101233734B1 (ko) | 2011-01-06 | 2012-01-02 | 메탈 할라이드 램프 |
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JP6217024B2 (ja) * | 2014-02-04 | 2017-10-25 | 岩崎電気株式会社 | マイクロ波無電極ランプ及びこれを使用した光照射装置 |
JP6252217B2 (ja) * | 2014-02-10 | 2017-12-27 | 岩崎電気株式会社 | マイクロ波無電極ランプ及びこれを使用した光照射装置 |
CN104498026B (zh) * | 2014-12-17 | 2017-01-11 | 普罗斯电器(中国)有限公司 | 一种紫外线光源用金属卤化物及其制备方法 |
JP2020107522A (ja) * | 2018-12-27 | 2020-07-09 | 東芝ライテック株式会社 | メタルハライドランプおよび紫外線照射装置 |
CN112219818A (zh) * | 2020-10-13 | 2021-01-15 | 赣州市金电电子设备有限公司 | 一种用于光诱松墨天牛的光源及方法 |
CN113443684A (zh) * | 2021-09-02 | 2021-09-28 | 深圳市盘古环保科技有限公司 | 一种可调的全波段紫外光发生系统 |
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US8749138B2 (en) | 2014-06-10 |
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CN102859641A (zh) | 2013-01-02 |
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TWI401725B (zh) | 2013-07-11 |
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KR101233734B1 (ko) | 2013-02-18 |
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