JPH04144052A - High pressure sodium lamp and discharge device therefor - Google Patents
High pressure sodium lamp and discharge device thereforInfo
- Publication number
- JPH04144052A JPH04144052A JP26913390A JP26913390A JPH04144052A JP H04144052 A JPH04144052 A JP H04144052A JP 26913390 A JP26913390 A JP 26913390A JP 26913390 A JP26913390 A JP 26913390A JP H04144052 A JPH04144052 A JP H04144052A
- Authority
- JP
- Japan
- Prior art keywords
- interference film
- lamp
- pressure sodium
- multilayer interference
- 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.)
- Pending
Links
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 21
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 21
- 239000011734 sodium Substances 0.000 title claims abstract description 21
- 239000011521 glass Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 13
- 239000010453 quartz Substances 0.000 abstract description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 description 13
- 238000002834 transmittance Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- LISYCWMGWAORRH-UHFFFAOYSA-N [Na].[Th] Chemical compound [Na].[Th] LISYCWMGWAORRH-UHFFFAOYSA-N 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、高圧ナトリウムランプおよび高圧士トリウム
放電装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to high pressure sodium lamps and high pressure sodium thorium discharge devices.
従来の技術
従来、赤色光を発するＨＩＤ光源は、まだ実用化されて
おらず、黄橙発光の高圧ナトリウムンンブが使用されて
いるにすぎない。BACKGROUND OF THE INVENTION Conventionally, HID light sources that emit red light have not yet been put to practical use, and only high-pressure sodium bulbs that emit yellow-orange light have been used.
発明が解決しようとする課題
本発明は、赤色発光の強い高圧ナトリウムランプおよび
高圧ナトリウム放電装置を提供するものである。Problems to be Solved by the Invention The present invention provides a high-pressure sodium lamp and a high-pressure sodium discharge device that emit strong red light.
課題を解決するための手段
本発明の高圧ナトリウムランプは、表面に少なくとも５
５Ｑｎｍ以下の短波長を遮断する多層干渉膜を備えた透
光性筒で発光管を囲繞したものである。Means for Solving the Problems The high pressure sodium lamp of the present invention has at least 5
The arc tube is surrounded by a light-transmitting cylinder equipped with a multilayer interference film that blocks short wavelengths of 5 Q nm or less.
また、本発明の高圧ナトリウム放電装置は、少なくとも
５５０ｎｍ以丁の短波長を遮断する多層干渉膜を照明器
具の前面力→スに備えたものである。Further, the high-pressure sodium discharge device of the present invention is equipped with a multilayer interference film on the front surface of the lighting equipment that blocks short wavelengths of at least 550 nm or more.
作用
高圧の一升トリウム放電からの発光が多層干渉膜を通過
することにより、５５０ｎｍ以下の短ｉ７＆丑例の発光
か少なくなるため、相対的に赤色が強くなる。When the light emitted from the high-voltage one-mold thorium discharge passes through the multilayer interference film, the light emitted from short i7 and ox wavelengths of 550 nm or less is reduced, so the red color becomes relatively strong.
実施例
実施例１
コンピュータによるシミュレーションでは、色度点がｘ
−＝０．４７８１ 、ｙ＝０．４１５４、色温度２５０
０にの高圧ナトリウムランプからの発光を、第２図に示
す分光透過率の多層干渉膜を透過させることにより、色
度点ｘ＝０．６０３１ 。Examples Example 1 In computer simulation, the chromaticity point is x
-=0.4781, y=0.4154, color temperature 250
By transmitting light emitted from a high-pressure sodium lamp with a chromaticity point of x=0.6031 through a multilayer interference film with a spectral transmittance shown in FIG.
ｙ ＝ ０ 、３６２４、色温度は１２７６にとなるこ
とが予想された。It was expected that y = 0, 3624, and the color temperature would be 1276.
第１図において、多結晶アルミナからなる発光管１は、
内径８ 、０ ｍ−、全長５７ ｒｔｍ 、電極間距離
３２醒であり、内部にはナトリウム５ ｍｇ 、水銀１
４ｍｇおよびネオンと０．５％アルゴンガス、とのペニ
ングガスか３０Ｔｏ ｒ ｒ封入されている。発光管１
の両端部外面には保温筋２．３が付設され、点灯特発光
管内の蒸気圧を高める役目をしている。In FIG. 1, an arc tube 1 made of polycrystalline alumina is
The inner diameter is 8.0 m, the total length is 57 rtm, and the distance between the electrodes is 32 rtm.
4 mg and Penning gas of neon and 0.5% argon gas is sealed at 30 Torr. Luminous tube 1
Heat retention bars 2.3 are attached to the outer surface of both ends of the lamp, and serve to increase the vapor pressure within the lighting special luminescent tube.
発光管１は内径１９−２外径２２ｗ＠の石英管４で囲繞
され、その外面には第２図に示すように、酸化チタン（
Ｔ ｉ ０２）と酸化シリケイト（Ｓ ｉ ０２）とが
交互に９層積層された多層干渉膜５（干渉膜厚１０４０
Ａ＞が形成されている。その分光透過率は第３図に示す
とおりである。石英管４は支持板６．７で固定されてい
る。外管８内には発光管１が設けられており、外管８内
はゲッタ９を用いて高真空に排気されている。外管８の
一端部には口金１０が設けられている。The arc tube 1 is surrounded by a quartz tube 4 with an inner diameter of 19-2 and an outer diameter of 22w, and its outer surface is coated with titanium oxide (
A multilayer interference film 5 (interference film thickness 1040
A> is formed. Its spectral transmittance is as shown in FIG. The quartz tube 4 is fixed with a support plate 6.7. An arc tube 1 is provided inside the outer tube 8, and the inside of the outer tube 8 is evacuated to a high vacuum using a getter 9. A cap 10 is provided at one end of the outer tube 8.
なお、比較のため、上記実施例１と同一仕様で多層干渉
膜を形成していない透明の石英管のみを設けたランプも
準備した。このランプの色度点はｘ＝０．４７８１．ｙ
＝０．４１５４である。For comparison, a lamp with the same specifications as Example 1 and only a transparent quartz tube without a multilayer interference film was also prepared. The chromaticity point of this lamp is x=0.4781. y
=0.4154.
かかるランプをランプ人力１５０Ｗ、ランプ電圧１００
ｖとなるような安定器で点灯した。干渉膜付きのランプ
の分光分布は第４図曲線■に示すとおりで、５８０ｎｍ
以下の短波長細の発光が抑制されることとなる。第４図
曲線■は干渉膜なしのランプの場合を示している。干渉
膜付きランプの色度点はｘ＝０．６０３０．ｙ＝０．３
６２１、色温度は１２８６にであった。一方、ランプの
発光色は、強い赤色であり、多層干渉膜を形成したこと
による効果は明らかである。Such a lamp has a lamp power of 150W and a lamp voltage of 100W.
It was lit with a ballast that makes it v. The spectral distribution of the lamp with an interference film is as shown in Figure 4 curve ■, and is 580 nm.
The following short wavelength light emission is suppressed. Curve 4 in FIG. 4 shows the case of a lamp without an interference film. The chromaticity point of the lamp with an interference film is x=0.6030. y=0.3
621, and the color temperature was 1286. On the other hand, the lamp emits a strong red color, and the effect of forming the multilayer interference film is clear.
かかるランプを５．５時間点灯、０．５時間消灯のサイ
クルで１２０００時間点灯したが、色度点のずれはなく
、赤味の強い発光を示していた。This lamp was lit for 12,000 hours in a cycle of 5.5 hours on and 0.5 hours off, but there was no shift in the chromaticity point and it emitted strong reddish light.
実施例２
第５図において、多結晶アルミナからなる発光管１は、
内径７ 、５ ｗａ 、全長１１６ｎｏｓ、！極間距離
８４ｍであり、内部にはナトリウム３．７■。Example 2 In FIG. 5, the arc tube 1 made of polycrystalline alumina is
Inner diameter 7.5 wa, total length 116 nos! The distance between poles is 84m, and there is 3.7cm of sodium inside.
水銀１６．３ｍｇおよびキセノンガス２５０Ｔｏｒｒが
封入されている。発光管１は、内径２８ｍ、外径３１＋
ｎｍの石英管４で囲繞され、その外面には酸化チタン（
Ｔ ｉ ０２）と酸化シリケイト（Ｓ ｉ Ｏ：ｙ）と
が交互に９層積層されて多層干渉！１１５（干渉膜厚１
０４０Ａ）が形成されており、その分光透過率は第３図
に示すとおりである。石英管４は支持板６．７で固定さ
れている。発光管１の外面には近接導体１１が付設され
、始動時のみ電位が印加され始動電圧が低下するように
なっている。１２は抵抗とバイメタルからなるサーマル
式スタータである。It is filled with 16.3 mg of mercury and 250 Torr of xenon gas. The arc tube 1 has an inner diameter of 28 m and an outer diameter of 31+
It is surrounded by a quartz tube 4 of nanometer diameter, and its outer surface is coated with titanium oxide (
Nine layers of T i 02) and silicate oxide (S i O:y) are alternately stacked to create multilayer interference! 115 (interference film thickness 1
040A) is formed, and its spectral transmittance is as shown in FIG. The quartz tube 4 is fixed with a support plate 6.7. A proximal conductor 11 is attached to the outer surface of the arc tube 1, and a potential is applied only at the time of starting, thereby reducing the starting voltage. 12 is a thermal starter made of a resistor and bimetal.
比較のため、上記実施例２と同一仕様で、多層干渉膜５
を形成していないランプも準備した。For comparison, a multilayer interference film 5 with the same specifications as the above Example 2 was used.
We also prepared lamps that did not form a
かかるランプを高圧水銀ランプ４００Ｗ用安定器で点灯
したおころ、ランプ人力３６０Ｗ、ランプ電圧１３０Ｖ
を示し、干渉膜付きのランプの分光分布は第６図曲線■
に示すとおりで、５８０ｎｍ以下の短波長側の発光が抑
制されることとなる。第６図曲線■は干渉膜なしのラン
プの分光分布を示す。This lamp was lit with a ballast for a 400W high-pressure mercury lamp, the lamp power was 360W, and the lamp voltage was 130V.
The spectral distribution of the lamp with an interference film is shown by the curve in Figure 6 ■
As shown in , the light emission on the short wavelength side of 580 nm or less is suppressed. Curve 6 in FIG. 6 shows the spectral distribution of a lamp without an interference film.
干渉膜付きのランプの色度点はｘ＝０．５９０５゜ｙ＝
０．３９４０．色温度は１４７９にであった。The chromaticity point of the lamp with interference film is x=0.5905°y=
0.3940. Color temperature was 1479.
ランプの発光色は、強い赤色を示した。一方、多層干渉
膜のない比較ランプの色度点は、同一の安定器で点灯し
たところ、ｘ＝０．５２６．ｙ＝０．４２０てあった。The lamp emitted a strong red color. On the other hand, the chromaticity point of a comparative lamp without a multilayer interference film when lit with the same ballast was x=0.526. It was y=0.420.
かかるランプを５．５時間点灯、０．５時間消灯のサイ
クルで１２０００時間点灯したところ、色度点は、初期
値と同じであり、赤味の強い発光を示した。When this lamp was lit for 12,000 hours in a cycle of 5.5 hours on and 0.5 hours off, the chromaticity point was the same as the initial value, and it emitted strong reddish light.
多層干渉膜を形成するスリーブとしては、上記石英カラ
スのほか、アルミノシリケイトガラス。In addition to the quartz glass mentioned above, aluminosilicate glass can be used as the sleeve for forming the multilayer interference film.
透光性セラミックなども使用できる。Translucent ceramics can also be used.
実施例１，２では、多層干渉膜を石英管２の外面に形成
した例であるが、石英管２の内面に付着させでも同様の
効果が得られる。In Examples 1 and 2, the multilayer interference film is formed on the outer surface of the quartz tube 2, but the same effect can be obtained by attaching it to the inner surface of the quartz tube 2.
実施例３
第７図において、１３は色度点ｘ＝０．４７８１゜ｙ＝
０．４１５４、色温度２５００にの演色本位形高圧ナト
リウムランプ１５０Ｗである。１４は前面ガラス１５を
有する照明器具で、前面ガラス１５の外面には酸化チタ
ン（Ｔ ｉ ０２）と酸化シリケイト（Ｓｉ（ｈ）が交
互に９層積層されて多層干渉膜４（干渉膜厚１０４０Ａ
）が形成されており（第８図参照）、その分光透過率は
第３図に示すとおりである。１６は照明器具１４の反射
鏡である。１７は照明器具１４の支持体である。Example 3 In FIG. 7, 13 is the chromaticity point x=0.4781°y=
0.4154 and a color temperature of 2500, a 150W color rendering standard high pressure sodium lamp. 14 is a lighting device having a front glass 15, on the outer surface of the front glass 15, nine layers of titanium oxide (T i 02) and silicate oxide (Si(h)) are alternately laminated to form a multilayer interference film 4 (interference film thickness 1040A).
) is formed (see FIG. 8), and its spectral transmittance is as shown in FIG. 16 is a reflecting mirror of the lighting fixture 14. 17 is a support for the lighting fixture 14.
かかる高圧ナトリウム放電装置を定格のランプ人力１５
０Ｗ、ランプ電圧１００ Ｖとなるような安定器で点灯
した。この時、照明器具２の前面から放射される分光分
布を第４図曲線Ｉに示す。色度点はｘ＝０．６０３５．
ｙ＝０．３６１５、色温度は１３０１にであった。ラン
プの発光色は、強い赤色であり、多層干渉膜を形成した
ことによる効果は明らかである。Such a high-pressure sodium discharge device is rated at a lamp power of 15
It was lit with a ballast that produced 0W and a lamp voltage of 100V. At this time, the spectral distribution emitted from the front surface of the lighting fixture 2 is shown in curve I in FIG. The chromaticity point is x=0.6035.
y=0.3615, color temperature was 1301. The lamp emits a strong red color, and the effect of forming the multilayer interference film is clear.
なお、比較のため、上記実施例３と同一の仕様で多層干
渉膜を塗布していない透明のガラスのみを設置した放電
装置の分光分布を第４図曲線Ｈに示し７す。そして、こ
の放電装置を上記実施例と同じ安定器で点灯したところ
、色度点はｘ＝０．４７８８、ｙ＝０．４１５４となっ
た。For comparison, the spectral distribution of a discharge device having the same specifications as in Example 3 and equipped with only transparent glass without coating with a multilayer interference film is shown in curve H in FIG. 4. When this discharge device was turned on using the same ballast as in the above example, the chromaticity points were x=0.4788 and y=0.4154.
上記から、多層干渉膜を設けたことの効果は明らかであ
る。From the above, the effect of providing the multilayer interference film is clear.
かかるランプを５．５時間点灯、０．５時間消灯のサイ
クルて１２０００時間点灯ところ、色度点のずれはなく
、赤味の強い発光を示した。When this lamp was turned on for 12,000 hours in a cycle of 5.5 hours on and 0.5 hours off, there was no shift in the chromaticity point, and it emitted strong reddish light.
実施例４
上記実施例３における演色本位形高圧ナトリウムランプ
の代わりに、色度点ｘ＝０．５２６．ｙＯ，４２０の効
率本位形高圧ナトリウムランプを用い、他は実施例３と
同一構成とした場合である。Example 4 Instead of the color rendering standard high pressure sodium lamp in Example 3, a chromaticity point x=0.526. This is a case where an efficiency-oriented high-pressure sodium lamp of yO, 420 was used, and the other configurations were the same as in Example 3.
なお、比較のため上記実施例４と同一仕様で多層干渉膜
を塗布していない透明のガラスのみを設置した放電装置
も準備した。For comparison, a discharge device with the same specifications as in Example 4 and only transparent glass without a multilayer interference film coated thereon was also prepared.
かかるランプを高圧水銀ランプ４００Ｗ用安定器で点灯
したところ、ランプ人力３６０Ｗ、ランプ電圧１３０Ｖ
を示し、この時の分光分布は第６図曲線ｍに示すとおり
であり、５８０ｎｍ以下の短波長側の発光が抑制される
こととなる。同図曲線■は多層干渉膜なしの放電装置の
場合である。多層干渉膜付きの放電装置の色度点はｘ＝
０．５９１４゜ｙ＝０．３９４２、色温度は１４５６Ｋ
を示した。ランプの発光色は、強い赤色を示した。When such a lamp was lit using a ballast for a 400W high-pressure mercury lamp, the lamp power was 360W and the lamp voltage was 130V.
The spectral distribution at this time is as shown in curve m in FIG. 6, and light emission on the short wavelength side of 580 nm or less is suppressed. Curve 2 in the figure is for a discharge device without a multilayer interference film. The chromaticity point of a discharge device with a multilayer interference film is x=
0.5914°y=0.3942, color temperature is 1456K
showed that. The lamp emitted a strong red color.
なお、本発明にかかる放電装置のランプを５．５時間点
灯、０．５時間消灯のサイクルで１２０００時間点灯し
たところ、色度点は、初期値と同じてあり、赤味の強い
発光を示していた。In addition, when the lamp of the discharge device according to the present invention was lit for 12,000 hours in a cycle of 5.5 hours on and 0.5 hours off, the chromaticity point was the same as the initial value, indicating strong reddish light emission. was.
上記実施例３，４では、前面ガラスの外面に多層干渉膜
を形成した例を説明したが、前面ガラスの内面に形成し
ても、同様の効果が得られる。In the third and fourth embodiments described above, an example was explained in which the multilayer interference film was formed on the outer surface of the front glass, but the same effect can be obtained even if the multilayer interference film is formed on the inner surface of the front glass.
上記実施例１〜４では、多層干渉膜として、ＴｉＯ２−
８ｉ０２を用いた例をあげたが、Ｔａ２Ｏ３Ｓ ｉ０２
．ＺｎＳ ＭｇＦ２なども用いることができる。In Examples 1 to 4 above, TiO2-
Although the example using 8i02 was given, Ta2O3S i02
．． ZnS MgF2, etc. can also be used.
多層干渉膜が抑制する波長が、上記各実施例では５８０
ｎｍであるが、５５０ｎｍ付近でも赤色感はやや弱くな
るものの、発光色自体は赤色であり、本発明の目的は達
成できる。The wavelength suppressed by the multilayer interference film is 580 in each of the above embodiments.
Even around 550 nm, the red color becomes a little weaker, but the emission color itself is red, and the object of the present invention can be achieved.
発明の詳細
な説明したように、本発明によれば、赤色発光の強い高
圧ナトリウムランプおよび高圧ナトリウム放電装置を提
供することができるものである。As described in detail, according to the present invention, it is possible to provide a high-pressure sodium lamp and a high-pressure sodium discharge device that emit strong red light.
第１図は本発明の実施例１の高圧ナトリウムランプ正面
図、第２図は石英管に塗布した多層干渉膜の拡大断面図
、第３図は多層干渉膜の分光透過率を示す図、第４図は
本発明の実施例１，３の分光エネルギー分布を示す図、
第５図は本発明の実明にかかる高圧ナトリウム放電装置
の正面図、第８図は多層干渉吸付き前面ガラスの拡大断
面図である。
１・・・・・・発光管、２，３・・・・・・保温筋、４
・・−・・・石英管、５・・・・・・多層干渉膜、８・
・・・・・外管、 ・・・・・・高圧ナトリウムランプ
、 ・・・・・・照明器具。Fig. 1 is a front view of the high-pressure sodium lamp of Example 1 of the present invention, Fig. 2 is an enlarged sectional view of a multilayer interference film coated on a quartz tube, Fig. 3 is a diagram showing the spectral transmittance of the multilayer interference film, and Fig. 3 is a diagram showing the spectral transmittance of the multilayer interference film. Figure 4 is a diagram showing the spectral energy distribution of Examples 1 and 3 of the present invention,
FIG. 5 is a front view of a high-pressure sodium discharge device according to the present invention, and FIG. 8 is an enlarged sectional view of a front glass with multilayer interference suction. 1... Arc tube, 2, 3... Heat retention muscle, 4
......Quartz tube, 5...Multilayer interference film, 8.
...Outer tube, ...High pressure sodium lamp, ...Lighting equipment.
Claims (2)
する多層干渉膜を備えた透光性筒で発光管を囲繞したこ
とを特徴とする高圧ナトリウムランプ。(1) A high-pressure sodium lamp characterized in that an arc tube is surrounded by a light-transmitting tube having a multilayer interference film on its surface that blocks short wavelengths of at least 550 nm or less.
層干渉膜を照明器具の前面ガラスに備えたことを特徴と
する高圧ナトリウム放電装置。(2) A high-pressure sodium discharge device characterized in that the front glass of the lighting device is equipped with a multilayer interference film that blocks short wavelengths of at least 550 nm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26913390A JPH04144052A (en) | 1990-10-05 | 1990-10-05 | High pressure sodium lamp and discharge device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26913390A JPH04144052A (en) | 1990-10-05 | 1990-10-05 | High pressure sodium lamp and discharge device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04144052A true JPH04144052A (en) | 1992-05-18 |
Family
ID=17468157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26913390A Pending JPH04144052A (en) | 1990-10-05 | 1990-10-05 | High pressure sodium lamp and discharge device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04144052A (en) |
-
1990
- 1990-10-05 JP JP26913390A patent/JPH04144052A/en active Pending
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