JP4805476B2 - High color rendering metal halide lamp - Google Patents
High color rendering metal halide lamp Download PDFInfo
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- JP4805476B2 JP4805476B2 JP2001152137A JP2001152137A JP4805476B2 JP 4805476 B2 JP4805476 B2 JP 4805476B2 JP 2001152137 A JP2001152137 A JP 2001152137A JP 2001152137 A JP2001152137 A JP 2001152137A JP 4805476 B2 JP4805476 B2 JP 4805476B2
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- color rendering
- metal halide
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Description
【0001】
【発明の属する技術分野】
本発明は、水槽照明用光源として使用される高演色メタルハライドランプに関する。
【0002】
【従来の技術】
従来、水槽内の水草照明用光源としては、蛍光灯が使用されていたが、蛍光灯は光束が低く、水面を照らしても、照射光は水槽上部のところで乱反射してしまい、水槽中央部から下部への照射が十分にできなかった。近年、光束が12000lm、色温度が5200K、平均演色評価数(Ra)が80、黒体放射(BBL)の上に沿った図6に示す分光分布特性を有する一般照明用のメタルハライドランプが使用されている。このランプは、水深1mの水槽でも照射光は十分に水槽下部まで行き届くようになり、従来の蛍光灯では再現出来なかった水面のゆらぎも演出出来るようになった。
【0003】
【発明が解決しようとする課題】
しかしながら、前記一般照明用のメタルハライドランプでは、水槽内の水草を鮮やかに再現しかつ、水草以外の被照射物を効果的に演出する照明は得られなかった。また、色温度が7000K以上のメタルハライドランプは、図7に示すような分光分布になっていて、光束が7000lmと低いうえ、特殊演色評価数(R14)が84と低く、平均演色評価数(Ra)も85となっているため演色性が悪く、水槽内の水草及び水草以外の被照射物、例えば熱帯魚等の美しい色彩を鮮やかに効果的に演出する事ができないという問題があった。
【0004】
本発明者等は、水槽内の視認性を確認する実験の結果、水槽内の水草を鮮やかに再現しかつ、水草以外の被照射物を効果的に演出する照明を得るには、色温度が7000K〜8000K、黒体放射(BBL)からのずれ(DUV)が+0.015〜+0.020、平均演色評価数(Ra)が90以上必要であることを見出した。
【0005】
本発明は、上記問題点を解消するためになされたものであり、光束が十分にあり、水槽内の水草を鮮やかに再現しかつ、水草以外の被照射物を効果的に演出することができる高演色メタルハライドランプを提供することを目的とする。
【0006】
【課題を解決するための手段】
上記問題点を解決するために請求項1は、両端部に電極を備えた発光管内に、始動用希ガスと、水銀と、2種類のハロゲン化物の混晶体を封入し、前記発光管内の2種類のハロゲン化物(ハロゲンをXと記載する)の混晶体は、DyX,CsX,NdXで構成されるa群と、TlX,InXで構成されるb群であり、a群とb群とのモル比が、1.8≦a群/b群≦3.0の範囲で封入することにより、色温度を7000K〜8000K、黒体放射(BBL)からのずれ(DUV)を+0.015〜+0.020、平均演色評価数(Ra)を90以上としたことを特徴とする。
【0007】
請求項2は、前記混晶体b群の封入量は0.3mg〜0.5mgとしたことを特徴とする。また、請求項3は、前記混晶体のモル比を1.8≦a群/b群≦3.0と規定することにより、色度座標(x,y)が(0.300,0.350),(0.286,0.334),(0.302,0.342),(0.288,0.326)の4頂点で囲まれた範囲となることを特徴とする。
【0008】
請求項1と請求項2または3記載の発明によれば、ランプ電力に関係なく、光束が十分にあり、水槽内の水草を鮮やかに再現しかつ、水草以外の熱帯魚等の美しい色彩の被照射物を効果的に演出できる水槽用照明光源である高演色メタルハライドランプが得られる。
【0009】
【発明の実施の形態】
以下、本発明の詳細を図によって説明する。図1は、本発明の一実施例を示すランプ電力が150Wの高演色メタルハライドランプの概略構成図である。内容積2ccの石英製発光管1の両端には一対の電極2が封止されている。同発光管1内には、DyI3、CsI、NdI3のヨウ化物の混晶体a群が2.97μmolとTlI、InIのヨウ化物の混晶体b群が1.31μmol、水銀が7mg、アルゴンガスが6650Pa封入されている。
【0010】
そして発光管1の両端は、モリブデン製のU字形補助材3によって保持され、発光管1とともに、石英製外管4内に組み込まれる。石英製外管4の両端には、セラミックス製の口金5が取り付けられている。6は保温膜、7はジルコニウムとアルミニウムの混晶体ゲッタ−である。
【0011】
図2および図3は、Dy-Nd系の高演色メタルハライドランプにTlI、InIで構成されるヨウ化物の混晶体b群を封入した際の黒体放射(BBL)からのずれ(DUV)および平均演色評価数(Ra)を測定した結果である。図2および図3から、黒体放射(BBL)からのずれ(DUV)を+0.015〜+0.020、平均演色評価数(Ra)を90以上にするためには、ヨウ化物の混晶体b群の封入量は、0.3mg〜0.5mg(0.99μmol〜1.65μmol)でなければならないことがわかる。
【0012】
図4は水槽用照明の色温度範囲を示す図である。発光管1内にDyI3、CsI、NdI3で構成されるヨウ化物の混晶体a群と、TlI、InIで構成されるヨウ化物の混晶体b群とのモル比を、1.8≦a群/b群≦3.0の範囲で封入すれば、色度座標(x,y)が(0.300,0.350)、 (0.286,0.334) 、(0.302,0.342) 、(0.288,0.326)の4頂点で囲まれた図中Bの範囲内に入り、色温度が7000K〜8000K、黒体放射(BBL)からのずれ(DUV)が+0.015〜+0.020になる。また、平均演色評価数(Ra)は90以上になる。Bの範囲内であれば、水槽内の水草を鮮やかに再現しかつ、水草以外の熱帯魚等の美しい色彩の被照射物を効果的に演出できる。
【0013】
図中A点は、従来の一般照明用メタルハライドランプである。色度座標(x,y)が(0.333,0.344)で、色温度が5475K、黒体放射(BBL)からのずれ(DUV)は+0.001とずれ幅が小さいが、赤色が濃くなり、平均演色評価数(Ra)が80と低くなって演色性が悪くなっている。このため、水槽内の水草を鮮やかに再現しかつ、水草以外の熱帯魚等の美しい色彩の被照射物を効果的に演出できない。
【0014】
そして図中C点は、色度座標(x,y)が(0.266,0.258)で、色温度が16000K、黒体放射(BBL)からのずれ(DUV)は−0.006のメタルハライドランプであり、青色が濃くなって緑色が薄くなり、平均演色評価数(Ra)が85なので、水槽内の水草を鮮やかに再現しかつ、水草以外の熱帯魚等の美しい色彩の被照射物を効果的に演出できない。
【0015】
発光管1内にDyI3、CsI、NdI3で構成されるヨウ化物の混晶体a群と、TlI、InIで構成されるヨウ化物の混晶体b群とのモル比を、1.8≦a群/b群≦3.0とすることによって、可視光の全波長帯域に発光するDyが活性化され、色温度が7000K〜8000Kで、平均演色評価数(Ra)との相関が高い特殊演色評価数R9(赤)、R11(緑)、R1 2(青)、が大きくなり、平均演色評価数(Ra)が90以上のランプが得られる。
【0016】
図5は、前記一実施例のランプ電力が150Wの高演色メタルハライドランプの分光分布特性図であり、光束が12000lm、色温度が7044K、Raが90、黒体軌跡(BBL)からのずれ(DUV)が+0.016となっている。従来ランプの図6と図7の分光分布と比較すると、図5の方が可視光の全波長域帯にわたって発光していることがわかる。なお、本実施例ではハロゲン化物をヨウ化物で記載したが、ハロゲン化物は臭化物やその他であっても、同様の特性が得られた。
【0017】
【発明の効果】
以上説明したように、本発明によれば、水槽内の水草及び熱帯魚等の美しい色彩を鮮やかに再現することができ、自然な観賞に適した水槽用照明光源となる高演色メタルハライドランプが得られる。
【図面の簡単な説明】
【図1】本発明の高演色メタルハライドランプの一実施例を示す概略構成図である。
【図2】Dy-Nd系メタルハライドランプにヨウ化物の混晶体b群を封入した際のDUVを測定した図である。
【図3】Dy-Nd系メタルハライドランプにヨウ化物の混晶体b群を封入した際のRaを測定した図である。
【図4】水槽用照明の色度範囲を示す図である。
【図5】本発明の一実施例である高演色メタルハライドランプの分光分布特性図である。
【図6】一般照明用のメタルハライドランプの分光分布特性図である。
【図7】色温度が10000Kのメタルハライドランプの分光分布特性図である。
【符号の説明】
1 発光管
2 電極
3 U字形補助材
4 外管
5 口金
6 保温膜
7 ゲッター[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high color rendering metal halide lamp used as a light source for aquarium illumination.
[0002]
[Prior art]
Conventionally, fluorescent lamps have been used as light sources for aquatic plants in the aquarium, but the fluorescent lamp has a low luminous flux, and even when it illuminates the water surface, the irradiating light is diffusely reflected at the top of the aquarium. The lower part could not be irradiated sufficiently. In recent years, a metal halide lamp for general illumination having a spectral distribution characteristic shown in FIG. 6 along a black body radiation (BBL) having a luminous flux of 12000 lm, a color temperature of 5200 K, an average color rendering index (Ra) of 80, and a black body radiation (BBL) has been used. ing. With this lamp, the irradiation light can reach the lower part of the water tank even in a 1m deep water tank, and the water surface fluctuation that could not be reproduced with conventional fluorescent lamps can be produced.
[0003]
[Problems to be solved by the invention]
However, in the metal halide lamp for general illumination, illumination that can reproduce the aquatic plants in the aquarium vividly and effectively produce the irradiated object other than the aquatic plants cannot be obtained. Further, the metal halide lamp having a color temperature of 7000 K or higher has a spectral distribution as shown in FIG. 7, the luminous flux is as low as 7000 lm, the special color rendering index (R 14 ) is as low as 84, and the average color rendering index ( Since Ra) is also 85, the color rendering properties are poor, and there is a problem in that beautiful colors such as aquatic plants in the aquarium and irradiated objects other than aquatic plants such as tropical fish cannot be produced vividly and effectively.
[0004]
As a result of an experiment for confirming the visibility in the aquarium, the present inventors have vividly reproduced the aquatic plants in the aquarium, and in order to obtain illumination that effectively produces an irradiated object other than aquatic plants, the color temperature is It has been found that 7000 K to 8000 K, deviation from black body radiation (BBL) (DUV) is +0.015 to +0.020, and average color rendering index (Ra) is 90 or more.
[0005]
The present invention has been made to solve the above-mentioned problems, has a sufficient luminous flux, vividly reproduces the aquatic plants in the aquarium, and can effectively produce irradiated objects other than the aquatic plants. The object is to provide a high color rendering metal halide lamp.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, according to claim 1, a starting rare gas, mercury, and a mixed crystal of two types of halides are sealed in an arc tube provided with electrodes at both ends, and 2 in the arc tube. The mixed crystal of types of halides (where halogen is described as X) is a group consisting of DyX, CsX, and NdX and a group b consisting of TlX and InX. By enclosing in the range of 1.8 ≦ a group / b group ≦ 3.0, the color temperature is 7000K to 8000K, the deviation from black body radiation (BBL) (DUV) is +0.015 to +0.020, the average color rendering The evaluation number (Ra) is set to 90 or more .
[0007]
A second aspect of the present invention is characterized in that the amount of the mixed crystal body b group is 0.3 mg to 0.5 mg. Further, in the present invention, the molar ratio of the mixed crystal is defined as 1.8 ≦ a group / b group ≦ 3.0, so that the chromaticity coordinates (x, y) are (0.300, 0.350), (0.286, 0.334), It is characterized by a range surrounded by four vertices (0.302, 0.342) and (0.288, 0.326).
[0008]
According to the invention described in claim 1 and claim 2 or 3 , regardless of the lamp power, there is sufficient luminous flux, vivid reproduction of aquatic plants in the aquarium, and irradiation of beautiful colors such as tropical fish other than aquatic plants A high color rendering metal halide lamp, which is an aquarium illumination light source that can effectively produce objects, is obtained.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the details of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a high color rendering metal halide lamp having a lamp power of 150 W according to an embodiment of the present invention. A pair of
[0010]
Both ends of the arc tube 1 are held by a U-shaped
[0011]
2 and 3 show deviation (DUV) and average from black body radiation (BBL) when a mixed crystal body b of iodide composed of TlI and InI is sealed in a Dy-Nd high color rendering metal halide lamp. It is the result of measuring the color rendering index (Ra). From FIG. 2 and FIG. 3, in order to make the deviation (DUV) from black body radiation (BBL) to +0.015 to +0.020 and the average color rendering index (Ra) to 90 or more, a mixed crystal b of iodide b It can be seen that the encapsulated amount of the group should be 0.3 mg to 0.5 mg (0.99 μmol to 1.65 μmol).
[0012]
FIG. 4 is a diagram showing the color temperature range of the aquarium illumination. The molar ratio of the iodide mixed crystal group a composed of DyI 3 , CsI, and NdI 3 and the iodide mixed crystal body b group composed of TlI and InI in the arc tube 1 is set to 1.8 ≦ a When encapsulating in the range of group / b group ≦ 3.0, the chromaticity coordinates (x, y) are (0.300, 0.350), (0.286, 0.334), (0.3302, 0). .342) and (0.288, 0.326) are within the range of B in the figure, the color temperature is 7000K to 8000K, and the deviation (DUV) from black body radiation (BBL) is +0 .015 to +0.020. The average color rendering index (Ra) is 90 or more. If it is in the range of B, the aquatic plants in the aquarium can be reproduced vividly, and an object to be illuminated with beautiful colors such as tropical fish other than aquatic plants can be effectively produced.
[0013]
A point in the figure is a conventional metal halide lamp for general illumination. The chromaticity coordinate (x, y) is (0.333, 0.344), the color temperature is 5475K, the deviation (DUV) from the black body radiation (BBL) is +0.001, the deviation width is small, but the red color It becomes darker and the average color rendering index (Ra) is as low as 80, resulting in poor color rendering. For this reason, the aquatic plants in the aquarium can be reproduced vividly, and an object to be irradiated with beautiful colors such as tropical fish other than the aquatic plants cannot be effectively produced.
[0014]
The point C in the figure has a chromaticity coordinate (x, y) of (0.266, 0.258), a color temperature of 16000K, and a deviation (DUV) from black body radiation (BBL) of -0.006. It is a metal halide lamp, and the blue color becomes dark and the green color becomes light, and the average color rendering index (Ra) is 85, so that the aquatic plants in the aquarium can be reproduced vividly, and beautiful colored objects such as tropical fish other than aquatic plants can be illuminated. Can not produce effectively.
[0015]
The molar ratio of the iodide mixed crystal group a composed of DyI 3 , CsI, and NdI 3 and the iodide mixed crystal body b group composed of TlI and InI in the arc tube 1 is set to 1.8 ≦ a By making the group / b group ≦ 3.0, Dy emitted in the entire wavelength band of visible light is activated, the color temperature is 7000K to 8000K, and the special color rendering having a high correlation with the average color rendering index (Ra) ratings R 9 (red), R 11 (green), R 1 2 (blue), is increased, color rendering index (Ra) is 90 or more lamps are obtained.
[0016]
FIG. 5 is a spectral distribution characteristic diagram of the high color rendering metal halide lamp having a lamp power of 150 W according to the embodiment. The luminous flux is 12000 lm, the color temperature is 7044 K, Ra is 90, and the deviation from the black body locus (BBL) (DUV). ) Is +0.016. 6 and 7 of the conventional lamp, it can be seen that FIG. 5 emits light over the entire wavelength band of visible light. In this example, the halide was described as iodide, but similar characteristics were obtained even if the halide was bromide or other.
[0017]
【The invention's effect】
As described above, according to the present invention, beautiful colors such as aquatic plants and tropical fish in the aquarium can be vividly reproduced, and a high color rendering metal halide lamp serving as an aquarium illumination light source suitable for natural viewing can be obtained. .
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a high color rendering metal halide lamp according to the present invention.
FIG. 2 is a diagram of DUV measured when a mixed crystal body b of iodide is sealed in a Dy—Nd-based metal halide lamp.
FIG. 3 is a graph showing Ra measured when a mixed crystal body b of iodide is sealed in a Dy—Nd-based metal halide lamp.
FIG. 4 is a diagram showing a chromaticity range of aquarium illumination.
FIG. 5 is a spectral distribution characteristic diagram of a high color rendering metal halide lamp according to an embodiment of the present invention.
FIG. 6 is a spectral distribution characteristic diagram of a metal halide lamp for general illumination.
FIG. 7 is a spectral distribution characteristic diagram of a metal halide lamp having a color temperature of 10,000K.
[Explanation of symbols]
1
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001152137A JP4805476B2 (en) | 2001-05-22 | 2001-05-22 | High color rendering metal halide lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001152137A JP4805476B2 (en) | 2001-05-22 | 2001-05-22 | High color rendering metal halide lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002343301A JP2002343301A (en) | 2002-11-29 |
| JP4805476B2 true JP4805476B2 (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001152137A Expired - Fee Related JP4805476B2 (en) | 2001-05-22 | 2001-05-22 | High color rendering metal halide lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2211083A4 (en) | 2007-11-12 | 2014-06-25 | Mitsubishi Chem Corp | LIGHTING SYSTEM |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3175314B2 (en) * | 1992-07-03 | 2001-06-11 | 岩崎電気株式会社 | Metal halide lamp |
| JPH0636747A (en) * | 1992-07-21 | 1994-02-10 | Sharp Corp | Light source |
| JP3110607B2 (en) * | 1994-04-12 | 2000-11-20 | 松下電子工業株式会社 | Metal halide lamp |
| JPH07296770A (en) * | 1994-04-22 | 1995-11-10 | Iwasaki Electric Co Ltd | Metal halide lamp for LCD projector |
| JPH087767A (en) * | 1994-06-23 | 1996-01-12 | Iwasaki Electric Co Ltd | Method for manufacturing inclusions for metal halide lamps |
| JPH0982277A (en) * | 1995-09-08 | 1997-03-28 | Iwasaki Electric Co Ltd | Metal halide lamps for aquatic plant development and viewing |
| JPH10302723A (en) * | 1997-04-30 | 1998-11-13 | Iwasaki Electric Co Ltd | Metal halide lamp |
| JPH1167148A (en) * | 1997-08-08 | 1999-03-09 | Iwasaki Electric Co Ltd | Metal halide lamp |
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| JP2002343301A (en) | 2002-11-29 |
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