JP3153254B2 - Lamp and manufacturing method thereof - Google Patents
Lamp and manufacturing method thereofInfo
- Publication number
- JP3153254B2 JP3153254B2 JP02829291A JP2829291A JP3153254B2 JP 3153254 B2 JP3153254 B2 JP 3153254B2 JP 02829291 A JP02829291 A JP 02829291A JP 2829291 A JP2829291 A JP 2829291A JP 3153254 B2 JP3153254 B2 JP 3153254B2
- Authority
- JP
- Japan
- Prior art keywords
- multilayer film
- film
- lamp
- layers
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Surface Treatment Of Glass (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は白熱ランプや放電ランプ
等のランプ及びその製造方法に関し、特に、ハロゲン電
球のバルブ表面に設ける光干渉用多層膜に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp such as an incandescent lamp or a discharge lamp and a method of manufacturing the same, and more particularly to a multilayer film for light interference provided on a bulb surface of a halogen bulb.
【０００２】[0002]
【従来の技術】ハロゲン電球に透明な誘電体多層膜を設
けて赤外光を反射させて、ランプの効率を向上させるこ
とは、例えば、特開昭 ５７−１１９４５４号公報、あ
るいは、特公平 １−１４２５８号公報に記載されてい
る。又、その時の誘電体膜の膜厚に関しては、例えば、
特開昭 ６１−１９０８５３号公報に記載されている。
更に、誘電体多層膜の可視域部の透過率を工夫して、ラ
ンプからの放射光を黄色系とする事も、例えば、実開平
１−８６１０２号公報に記載されている。又、更に、
誘電体多層膜の可視域部の透過率を工夫して、ランプか
らの放射光を高色温度とすることも、例えば、特開平
１− ９７３６９号公報に記載されている。2. Description of the Related Art To improve the efficiency of a halogen bulb by providing a transparent dielectric multilayer film on a halogen bulb to reflect infrared light is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-119454, or No. -14258. Regarding the thickness of the dielectric film at that time, for example,
It is described in JP-A-61-190853.
Further, a technique in which the transmittance of the dielectric multilayer film in the visible region is devised to make the light emitted from the lamp yellowish is described, for example, in Japanese Utility Model Laid-Open No. 1-86102. Also,
It is also possible to increase the color temperature of the light emitted from the lamp by devising the transmittance in the visible region of the dielectric multilayer film.
No. 1-97369.
【０００３】また、より一般的には、透明な誘電体によ
って、その誘電率と膜厚との積の４倍値近傍の波長の光
は選択的に干渉されて透過率、あるいは、反射率が変わ
ることは古くから知られている。Further, more generally, light having a wavelength in the vicinity of four times the product of the dielectric constant and the film thickness is selectively interfered with by a transparent dielectric, so that the transmittance or the reflectance is reduced. Changes have been known for a long time.
【０００４】[0004]
【発明が解決しようとする課題】上記従来技術は、効率
の向上、或いは光色の改良の点では有効であるが、光色
の改良と効率の向上を合わせ持つ点で不満足であった。
即ち、光色の改良のために、可視部の透過率を落すと、
必然的に光束が低下することとなり、光色改良の利点を
減じることとなった。The above prior art is effective in improving the efficiency or the light color, but is unsatisfactory in having both the improved light color and the improved efficiency.
In other words, when the transmittance of the visible part is reduced to improve the light color,
Inevitably, the luminous flux is reduced, and the advantage of light color improvement is reduced.
【０００５】本発明はこれらの点に関して、光束の低下
を最小限に押さえ、且つ、光色の高色温度化、あるいは
低色温度化を図ることを目的とするものである。An object of the present invention is to minimize the reduction of the luminous flux and to increase or decrease the color temperature of the light color.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明によるランプでは、ランプ外表面に誘電体多
層膜を設け、赤外線を反射させると共に、可視部の透過
率を調整して、所望の光色を得ている。この時、誘電体
多層膜は、可視光を透過させ赤外線を反射させるための
第一の多層膜と、可視部の透過率を調整するための第二
の多層膜とからなり、第一の多層膜を深層に、第二の多
層膜を表層に配置している。更に、第一の多層膜は６〜
１０層の干渉膜とし、第二の多層膜は４〜８層の干渉膜
としている。In order to achieve the above object, in the lamp according to the present invention, a dielectric multilayer film is provided on the outer surface of the lamp to reflect infrared rays and adjust the transmittance of the visible part. The desired light color is obtained. At this time, the dielectric multilayer film includes a first multilayer film for transmitting visible light and reflecting infrared light, and a second multilayer film for adjusting transmittance of a visible portion, and the first multilayer film. The film is arranged in a deep layer and the second multilayer film is arranged in a surface layer. Further, the first multilayer film is 6 to
The interference film has 10 layers, and the second multilayer film has 4 to 8 layers.
【０００７】[0007]
【作用】第一の多層膜によって、フィラメントから放射
された赤外線は反射され、その一部はフィラメントに戻
され、フィラメントを加熱することから、赤外線エネル
ギーの再利用によって、効率向上が図られる。第一の多
層膜を透過した可視光線は第二の多層膜によってその一
部が選択的に反射され、例えば、主に５５０ｎｍ〜７５
０ｎｍの波長が選択的に反射された場合には色温度が高
められ、主に４００ｎｍ〜６００ｎｍの波長が選択的に
反射された場合には色温度は低下する。この時、第二の
多層膜を表層に、第一の多層膜を深層に配置するなら
ば、赤外線は効率よく反射され、所定の可視光は効率よ
く透過する。逆に、第二の多層膜を深層に、第一の多層
膜を表層に配置するならば、第二の多層膜で反射された
赤外線と第一の多層膜で反射された赤外線とが干渉し
て、結果的に赤外線の反射率は押さえられ、したがっ
て、効率向上の程度が押さえられる事となる。The infrared rays emitted from the filament are reflected by the first multilayer film, and a part thereof is returned to the filament, and the filament is heated. Therefore, the efficiency is improved by reusing the infrared energy. Part of the visible light that has passed through the first multilayer film is selectively reflected by the second multilayer film.
When the wavelength of 0 nm is selectively reflected, the color temperature increases, and when the wavelength of 400 nm to 600 nm is selectively reflected, the color temperature decreases. At this time, if the second multilayer film is disposed on the surface layer and the first multilayer film is disposed on the deep layer, infrared light is reflected efficiently and predetermined visible light is transmitted efficiently. Conversely, if the second multilayer film is arranged in a deep layer and the first multilayer film is arranged in the surface layer, the infrared light reflected by the second multilayer film and the infrared light reflected by the first multilayer film interfere with each other. As a result, the reflectance of infrared rays is suppressed, and therefore, the degree of efficiency improvement is suppressed.
【０００８】また、第二の多層膜の層数が８層を超えて
多くなると、色温度の変化は大きくとれるが、反射され
る波長域での光出力が極端に少なくなり、違和感を生じ
る光となり、逆に、４層未満では十分な色温度変化を生
じさせることはできない。さらに、第一の多層膜の層数
が第二の多層膜の層数よりも少ないならば、第二の多層
膜によって可視光の一部が反射されることによる光束の
低下を赤外線の有効利用による効率の向上でカバーでき
なくなる。When the number of layers of the second multilayer film exceeds eight, the color temperature can be largely changed, but the light output in the reflected wavelength range becomes extremely small, and the light which causes a sense of incongruity is obtained. On the contrary, if the number of layers is less than four, a sufficient change in color temperature cannot be produced. Furthermore, if the number of layers of the first multilayer film is smaller than the number of layers of the second multilayer film, the reduction of the luminous flux due to the reflection of a part of the visible light by the second multilayer film is effectively used for infrared rays. Can not be covered by the improvement of efficiency due to.
【０００９】[0009]
【実施例】以下、本発明を図を用いて説明する。図１は
本発明をハロゲンランプに適用した実施例を示す図であ
り、同図において、１はフィラメント、２、２’は内部
リード線、３、３’はモリブデン箔、４、４’は外部リ
ード線、５は口金、６は石英バルブ、７はビーズであ
る。石英バルブ６の外表面には酸化チタン、並びに、酸
化珪素からなる誘電体多層膜が焼き付けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment in which the present invention is applied to a halogen lamp. In FIG. 1, 1 is a filament, 2 'is an internal lead wire, 3' is a molybdenum foil, and 4 and 4 'are external. 5 is a base, 6 is a quartz bulb, and 7 is a bead. On the outer surface of the quartz bulb 6, a dielectric multilayer film made of titanium oxide and silicon oxide is baked.
【００１０】図２は本発明をＨＩＤランプに適用した実
施例を示す図であり、同図において、１２、１２’は内
部リード線、１３、１３’はモリブデン箔、１５、１
５’は口金、１６は内管の石英バルブであり、その両端
は保温膜が塗布してあり、図示はしていないが、モリブ
デン箔を介して、一対の電極が埋め込んである。１７は
外管である。上記ハロゲンランプの場合と同様に、石英
バルブ１６の中央部外表面には酸化チタン、並びに、酸
化珪素からなる誘電体多層膜が焼き付けられている。FIG. 2 is a view showing an embodiment in which the present invention is applied to an HID lamp. In FIG. 2, reference numerals 12 and 12 'denote internal leads, reference numerals 13 and 13' denote molybdenum foils, and reference numerals 15 and 1.
5 'is a base, 16 is a quartz bulb of an inner tube, both ends of which are coated with a heat insulating film. Although not shown, a pair of electrodes are embedded through a molybdenum foil. 17 is an outer tube. As in the case of the halogen lamp, a dielectric multilayer film made of titanium oxide and silicon oxide is baked on the outer surface of the central portion of the quartz bulb 16.
【００１１】図３は本発明を適用した誘電体多層膜の一
例の分光反射率を示す図である。分光反射率の曲線ａ，
ｂはそれぞれ表１の誘電体多層膜をランプのバルブ表面
に設けたときのものである。ここで、誘電体多層膜は、
石英バルブ６または１６の側から、第１層、第２層と続
く。光学的膜厚は ｎｄ／ｗ0を単位とし、ｗ0は中心波
長、ｎは屈折率、ｄは膜厚である。FIG. 3 is a diagram showing the spectral reflectance of an example of a dielectric multilayer film to which the present invention is applied. Curves of spectral reflectance a,
b shows the results when the dielectric multilayer films shown in Table 1 were provided on the surface of the lamp bulb. Here, the dielectric multilayer film is
From the side of the quartz bulb 6 or 16, a first layer and a second layer continue. The optical film thickness is expressed in units of nd / w 0 , where w 0 is the center wavelength, n is the refractive index, and d is the film thickness.
【００１２】[0012]
【表１】 [Table 1]
【００１３】曲線ａ（破線）、ｂ（実線）共に、赤外線
を反射し、可視光を透過する第一の多層膜は８層からな
り、可視光の透過率を制御する第二の多層膜も同じく８
層からなるが、表層に第二の多層膜を設けた場合（曲線
ａ）には、深層に第二の多層膜を設けた場合（曲線ｂ）
に比べて、赤外部の反射率が高くなっている。ここには
第一の多層膜、第二の多層膜として８層の場合を示した
が、他の層数の場合も赤外線の反射の割合について、同
様であった。曲線ａ（破線）、ｂ（実線）どちらの場合
もハロゲン電球に適用したところ相関色温度は約３８０
０ｋと高く、赤みを減じた白色となっており、光束の減
少については、ａの場合には５％程度と目立たないもの
であったのに対して、ｂの場合には８％程度と一見して
分かる程度であった。なお、第一の多層膜の第二層の光
学膜厚の値が他の層より厚くなっているが、同じ厚さと
した場合も同様で有り、赤外部の反射率が若干異なる。In each of the curves a (broken line) and b (solid line), the first multilayer film that reflects infrared light and transmits visible light is composed of eight layers, and the second multilayer film that controls the transmittance of visible light is also provided. Same 8
When the second multilayer film is provided in the surface layer (curve a), the second multilayer film is provided in the deep layer (curve b).
The reflectance in the infrared region is higher than that of. Here, the case of eight layers as the first multilayer film and the second multilayer film is shown, but the ratio of the reflection of infrared rays is the same for other numbers of layers. When both curves a (broken line) and b (solid line) are applied to a halogen bulb, the correlated color temperature is about 380.
The color is high, 0k, and white with reduced redness. The reduction in luminous flux was as inconspicuous as about 5% in the case of a, whereas it was about 8% in the case of b. It was enough to understand. The value of the optical film thickness of the second layer of the first multilayer film is larger than that of the other layers. However, the same applies when the thickness is the same, and the reflectance in the infrared region is slightly different.
【００１４】次に、第二の多層膜として４層からなる干
渉膜を、第一の多層膜として８層からなる干渉膜をハロ
ゲン電球に適用し、第二の多層膜の中心波長を４００ｎ
ｍとし、光学的膜厚を０．２５とした場合には、相関色
温度は約２６００ｋと低く、暖かさを強調した色調とな
っており、この場合には、光束の減少はなく、逆に５％
程度の増加となった。同じく、第二の多層膜として６層
からなる干渉膜を、第一の多層膜１として８層からなる
干渉膜を用い、第二の多層膜の中心波長を５００ｎｍと
した場合にも、相関色温度は約２６００ｋと低くなった
が、この場合には光束の増減はなかった。また同じく、
第二の多層膜として８層からなる干渉膜を、第一の多層
膜として８層からなる干渉膜を用い、第二の多層膜の中
心波長を５２５ｎｍとした場合にも、相関色温度は約２
６００ｋと低くなったが、この場合には光束は約５％低
下した。このように、可視光の透過率を調整するための
干渉膜の層数が、赤外線を反射させるための干渉膜の層
数に対して多くなると、光束の減少が目立ち、好ましく
ない。Next, an interference film consisting of four layers as a second multilayer film and an interference film consisting of eight layers as a first multilayer film are applied to a halogen lamp, and the center wavelength of the second multilayer film is set to 400 nm.
m, and the optical film thickness is 0.25, the correlated color temperature is as low as about 2600 k, and the color tone emphasizes warmth. In this case, there is no decrease in luminous flux, and conversely 5%
The degree of increase. Similarly, when the interference film composed of six layers is used as the second multilayer film, the interference film composed of eight layers is used as the first multilayer film 1, and the center wavelength of the second multilayer film is set to 500 nm, the correlated color is also obtained. The temperature dropped to about 2600k, but in this case there was no increase or decrease in the luminous flux. Also,
Even when the eight-layer interference film is used as the second multilayer film and the eight-layer interference film is used as the first multilayer film, and the center wavelength of the second multilayer film is 525 nm, the correlated color temperature is about 2
At 600 k, the luminous flux was reduced by about 5%. As described above, when the number of layers of the interference film for adjusting the transmittance of visible light is larger than the number of layers of the interference film for reflecting infrared rays, the light flux is conspicuously reduced, which is not preferable.
【００１５】これらの実施例は、誘電体多層膜をその基
剤である薬液を塗布、焼成した場合について述べたが、
真空蒸着等で形成しても同様な効果が期待できる。In these embodiments, the case where the dielectric multilayer film is coated with a chemical solution as a base material and fired is described.
The same effect can be expected even if it is formed by vacuum deposition or the like.
【００１６】[0016]
【発明の効果】以上述べた如く、本発明によれば、ハロ
ゲン電球やＨＩＤランプなどのランプの石英バルブ表面
に誘電体多層膜を設けることにより、光源色を変える事
が出来るとともに、それに伴う効率の低下を最小限に押
さえる事が可能となり、また、それらランプを簡便に製
造することが出来る。As described above, according to the present invention, by providing a dielectric multilayer film on the surface of a quartz bulb of a lamp such as a halogen bulb or an HID lamp, the color of the light source can be changed, and the efficiency associated therewith can be changed. Of the lamp can be minimized, and the lamps can be easily manufactured.
【図１】図１は本発明の一実施例であるハロゲン電球を
示す図である。FIG. 1 is a view showing a halogen lamp according to an embodiment of the present invention.
【図２】図２は本発明の一実施例であるＨＩＤランプを
示す図である。FIG. 2 is a diagram showing an HID lamp according to one embodiment of the present invention.
【図３】図３は本発明を適用した誘電体多層膜の反射率
を示す特性図である。FIG. 3 is a characteristic diagram showing a reflectance of a dielectric multilayer film to which the present invention is applied.
６・・・石英バルブ １６・・・石英バル
ブ。6 Quartz bulb 16 Quartz bulb.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０１Ｋ 3/00 Ｈ０１Ｋ 3/00 Ｂ (56)参考文献 特開 平３−20961（ＪＰ，Ａ) 特開 平２−109250（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01J 61/35 C03C 17/34 H01J 9/20 H01K 1/32 H01K 3/00 ──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. 7 Identification symbol FI H01K 3/00 H01K 3/00 B (56) References JP-A-3-20961 (JP, A) JP-A-2-109250 ( JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01J 61/35 C03C 17/34 H01J 9/20 H01K 1/32 H01K 3/00
Claims (1)
低屈折率の透明体とからなる赤外線反射用多層膜、及び
可視光反射用多層膜を設けたランプにおいて、前記赤外
線反射用多層膜を深層に、前記可視光反射用多層膜を表
層に設け、前記赤外線反射用多層膜を６〜１０層とし、
前記可視光反射用多層膜を４〜８層としたことを特徴と
するランプ。1. A lamp provided with a multilayer film for reflecting infrared light and a multilayer film for reflecting visible light, comprising a transparent material having a high refractive index and a transparent material having a low refractive index on the surface of a glass bulb. The film is in a deep layer, the visible light reflecting multilayer film is provided on the surface layer, and the infrared reflecting multilayer film is 6 to 10 layers,
A lamp characterized in that the visible light reflecting multilayer film has 4 to 8 layers .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02829291A JP3153254B2 (en) | 1991-02-22 | 1991-02-22 | Lamp and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02829291A JP3153254B2 (en) | 1991-02-22 | 1991-02-22 | Lamp and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04267048A JPH04267048A (en) | 1992-09-22 |
| JP3153254B2 true JP3153254B2 (en) | 2001-04-03 |
Family
ID=12244541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02829291A Expired - Lifetime JP3153254B2 (en) | 1991-02-22 | 1991-02-22 | Lamp and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3153254B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6534903B1 (en) * | 2002-02-25 | 2003-03-18 | General Electric Company | Broad spectrum reflective coating for an electric lamp |
-
1991
- 1991-02-22 JP JP02829291A patent/JP3153254B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04267048A (en) | 1992-09-22 |
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