JPH0461460B2 - - Google Patents
Info
- Publication number
- JPH0461460B2 JPH0461460B2 JP27755984A JP27755984A JPH0461460B2 JP H0461460 B2 JPH0461460 B2 JP H0461460B2 JP 27755984 A JP27755984 A JP 27755984A JP 27755984 A JP27755984 A JP 27755984A JP H0461460 B2 JPH0461460 B2 JP H0461460B2
- Authority
- JP
- Japan
- Prior art keywords
- microwave
- lamp
- fixing flange
- power supply
- lamp fixing
- 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
Links
- 230000005684 electric field Effects 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 description 7
- 239000003989 dielectric material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はマイクロ波放電を利用した光源装
置、特にその無電極ランプの固定に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light source device using microwave discharge, particularly to fixing of an electrodeless lamp thereof.
〔従来の技術〕
第４図は出願番号59−66300号で提案した先行
技術のマイクロ波放電光源装置を示す要部断面図
である。図において、１はマイクロ波空胴の一部
を構成する円筒形状の金属メツシユ板、２は給電
口３を含むマイクロ波空胴壁、４はこれら壁面部
材１及び２によつて構成されるマイクロ波空胴、
５はこのマイクロ波空胴４内に配設された球形の
無電極ランプ、６はこのランプ５の壁面より突出
したランプ支持棒、７はランプ支持棒６を固定す
るランプ固定フランジで、セラミツク等の誘電体
よりなり、その一部に設けられた支持棒挿入口８
にランプ支持棒６を挿入し、かつ例えば水ガラス
を主体とするセメント材９でランプ支持棒６を接
着している。また、このランプ固定フランジ７は
マイクロ波空胴４内の空胴壁２に給電口３をまた
ぐように２本のビス１０によつて取り付けられて
いる。[Prior Art] FIG. 4 is a sectional view of essential parts of a prior art microwave discharge light source device proposed in Application No. 59-66300. In the figure, 1 is a cylindrical metal mesh plate constituting a part of the microwave cavity, 2 is a microwave cavity wall including a power supply port 3, and 4 is a microwave constituted by these wall members 1 and 2. wave cavity,
Reference numeral 5 denotes a spherical electrodeless lamp disposed within the microwave cavity 4, 6 a lamp support rod protruding from the wall surface of the lamp 5, and 7 a lamp fixing flange for fixing the lamp support rod 6, which is made of ceramic or the like. A support rod insertion hole 8 is made of a dielectric material and is provided in a part of the dielectric material.
A lamp support rod 6 is inserted into the lamp support rod 6, and the lamp support rod 6 is bonded with a cement material 9 mainly made of water glass, for example. Further, this lamp fixing flange 7 is attached to the cavity wall 2 in the microwave cavity 4 with two screws 10 so as to straddle the power supply port 3.
先行技術のマイクロ波放電光源装置は上記のよ
うに構成され、マグネトロン（図示せず）より発
振されたマイクロ波が導波管１１を通じ、給電口
３を介してマイクロ波空胴４内に放射される。無
電極ランプ５内の封入ガスはこのマイクロ波によ
り放電・発光する。この光が金属メツシユ板１を
通してマイクロ波空胴４外部に放出される。 The prior art microwave discharge light source device is configured as described above, in which microwaves oscillated by a magnetron (not shown) are radiated into the microwave cavity 4 through the waveguide 11 and the feed port 3. Ru. The gas sealed in the electrodeless lamp 5 discharges and emits light by this microwave. This light is emitted to the outside of the microwave cavity 4 through the metal mesh plate 1.
〔発明が解決しようとする問題点〕
先行技術のマイクロ波放電光源装置は以上のよ
うに構成されており、ランプ固定フランジ７がマ
イクロ波の給電口３をなす面に接するように設け
られているため、給電口３近傍に集中したマイク
ロ波電界がより強められ、気中放電を起こし、時
には金属メツシユ板１を破るといつた問題点があ
つた。[Problems to be Solved by the Invention] The microwave discharge light source device of the prior art is configured as described above, and the lamp fixing flange 7 is provided so as to be in contact with the surface forming the microwave power supply port 3. Therefore, the microwave electric field concentrated in the vicinity of the power supply port 3 becomes stronger, causing an air discharge and sometimes breaking the metal mesh plate 1, which is a problem.
この発明は上記のような問題点を解決するため
になされたもので、給電口近傍のマイクロ波電界
が強められることなく、気中放電の恐れのない装
置を得ることを目的とする。 This invention was made to solve the above-mentioned problems, and aims to provide a device in which the microwave electric field near the power supply port is not strengthened and there is no risk of air discharge.
この発明に係るマイクロ波放電光源装置は、給
電口をなす面とランプ固定フランジの給電口に対
向する面とが離れるようにしたものである。
In the microwave discharge light source device according to the present invention, the surface forming the power supply port and the surface of the lamp fixing flange facing the power supply port are separated from each other.
この発明におけるランプ固定フランジは、給電
口部に集中したマイクロ波電磁界から離れた位置
にあるため、集中したマイクロ波電界をさらに強
めることがない。
Since the lamp fixing flange in this invention is located away from the microwave electromagnetic field concentrated at the power supply port, it does not further strengthen the concentrated microwave electric field.
以下、この発明の一実施例を図について説明す
る。第１図において、７は無電極ランプ５のラン
プ支持棒６を挿入して支持固定するためのランプ
固定フランジ、７１はこのランプ固定フランジ７
と空胴壁２の間に挿入された誘電体の挿入板であ
る、１〜６，８〜１１は前記先行技術の装置と同
一である。
An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 7 is a lamp fixing flange for inserting and supporting the lamp support rod 6 of the electrodeless lamp 5, and 71 is the lamp fixing flange 7.
and the dielectric insert plates 1 to 6, 8 to 11 inserted between the cavity wall 2 and the cavity wall 2 are the same as in the prior art device.
この装置の動作も、前記先行技術のものと同
様、マグネトロンより発振されたマイクロ波が導
波管１１を通じ、給電口３を介してマイクロ波空
胴４内に放射される。無電極ランプ５内の封入ガ
スはこのマイクロ波により放電・発光する。この
ように給電口３は導波管１１より供給されるマイ
クロ波をマイクロ波空胴４内に結合するために設
けられたものであるが、その寸法は、無電極ラン
プ５の放電が定常に達した時にこの結合が最良に
なるように、すなわちインピーダンス整合が良い
ように決められている。したがつて、マイクロ波
が印加された直後、ランプ５の放電が開始する以
前はインピーダンス整合が悪く、給電口３部分で
大部分のμ波は反射される。しかも給電口３部分
では電界の集中が起こつている。 The operation of this device is similar to that of the prior art described above, in which microwaves oscillated by a magnetron are radiated into the microwave cavity 4 through the waveguide 11 and the feed port 3. The gas sealed in the electrodeless lamp 5 discharges and emits light by this microwave. In this way, the feed port 3 is provided to couple the microwave supplied from the waveguide 11 into the microwave cavity 4, but its dimensions are such that the discharge of the electrodeless lamp 5 is constant. It is determined so that the coupling is the best when the impedance is reached, that is, the impedance matching is good. Therefore, immediately after the microwave is applied and before the lamp 5 starts discharging, the impedance matching is poor and most of the μ-wave is reflected at the feed port 3 portion. Moreover, the electric field is concentrated at the power feeding port 3 portion.
この装置の給電口３近傍の電界分布は第２図の
Ec、Ewで示す矢印のようである。Ewは導波管１
１内部の電界であり、Ecは給電口部分の電界を示
す。この図でわかるように、給電口部分では電界
が集中しており、一部は空胴の側にはみ出してい
る。前述した第４図の装置にあつては、給電口３
のマイクロ波空胴側の面に接して誘電体のランプ
固定フランジ７があるため、ランプ固定フランジ
７中にも集中電界が存在することになり、ランプ
固定フランジ７が集中電界を乱すように働き、マ
イクロ波がこの部分でより強められる。 The electric field distribution near the power supply port 3 of this device is shown in Figure 2.
It looks like the arrows indicated by E c and E w . E w is waveguide 1
1, and E c indicates the electric field at the feed port. As can be seen in this figure, the electric field is concentrated at the feed port, and some of it protrudes toward the cavity side. In the case of the device shown in FIG. 4 described above, the power supply port 3
Since the dielectric lamp fixing flange 7 is in contact with the microwave cavity side surface of the lamp, a concentrated electric field also exists in the lamp fixing flange 7, and the lamp fixing flange 7 works to disturb the concentrated electric field. , the microwave is more intense in this part.
これに対し、この発明では第２図に示すよう
に、はみ出した集中電界を避けるように、挿入板
１によりランプ固定フランジ７の給電口に対向す
る面と給電口をなす面を離すようにした。従つ
て、ランプ固定フランジ７中には集中電界がほと
んど存在しないため、ランプ固定フランジ７が集
中電界を乱すことなく、マイクロ波電界をさらに
強めることもないから先行技術のものに比較して
気中放電が起こり難い。 In contrast, in the present invention, as shown in FIG. 2, the surface of the lamp fixing flange 7 facing the power supply port and the surface forming the power supply port are separated by the insertion plate 1 so as to avoid the protruding concentrated electric field. . Therefore, since there is almost no concentrated electric field in the lamp fixing flange 7, the lamp fixing flange 7 does not disturb the concentrated electric field and does not further strengthen the microwave electric field. Discharge is unlikely to occur.
なお、上記実施例では、マイクロ波空胴４とし
て空胴壁の大部分が金属メツシユで構成されたも
のを示したが、第３図に示すように空胴壁の一面
だけが金属メツシユのものでもよい。第３図にお
いて、１は金属メツシユ板、２は回転対称形の空
胴壁である。第３図において、このランプ固定フ
ランジ７は給電口に対向する面が凹状になつてお
り、ネジ止めした場合、この対向面の一部が給電
口をなす面から離れる。したがつて、この構成の
ものでも給電口部分の電界を乱すことなく、第１
図の実施例と同様の効果を奏する。 In the above embodiment, the microwave cavity 4 was shown in which most of the cavity wall was made of metal mesh, but as shown in FIG. 3, only one side of the cavity wall was made of metal mesh. But that's fine. In FIG. 3, 1 is a metal mesh plate, and 2 is a rotationally symmetrical cavity wall. In FIG. 3, the lamp fixing flange 7 has a concave surface facing the power supply port, and when screwed, a part of this opposing surface separates from the surface forming the power supply port. Therefore, even with this configuration, the first
The same effect as the embodiment shown in the figure is achieved.
以上のように、この発明によれば、ランプ固定
フランジが給電口部分の集中電界を避けるよう
に、給電口をなす面とランプ固定フランジの給電
口に対向する面とを離なす手段を設けたので、給
電口近傍のマイクロ波電界を乱さず、気中放電を
おさえて金属メツシユ板の破れる恐れのないマイ
クロ波放電光源装置が得られる効果がある。
As described above, according to the present invention, the lamp fixing flange is provided with a means for separating the surface forming the power feeding port and the surface of the lamp fixing flange facing the power feeding port so that the lamp fixing flange avoids a concentrated electric field at the power feeding port. Therefore, it is possible to obtain a microwave discharge light source device that does not disturb the microwave electric field in the vicinity of the power supply port, suppresses air discharge, and is free from the risk of breaking the metal mesh plate.
第１図はこの発明の一実施例によるマイクロ波
放電光源装置を示す要部断面図、第２図はこの発
明の一実施例に係る給電口近傍のマイクロ波電界
を示す要部拡大断面図、第３図はこの発明の他の
実施例によるマイクロ波放電光源装置を示す要部
断面図、第４図は先行技術によるマイクロ波放電
光源装置を示す要部断面図である。
２……空胴壁、３……給電口、４……マイクロ
波空胴、５……無電極ランプ、６……ランプ支持
棒、７……ランプ固定フランジ、７１……挿入
板、１１……導波管。なお図中、同一符号は同一
又は相当部分を示す。
FIG. 1 is a sectional view of a main part showing a microwave discharge light source device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a main part showing a microwave electric field near a power supply port according to an embodiment of the invention, FIG. 3 is a sectional view of a main part of a microwave discharge light source device according to another embodiment of the present invention, and FIG. 4 is a sectional view of a main part of a microwave discharge light source device according to a prior art. 2... Cavity wall, 3... Power supply port, 4... Microwave cavity, 5... Electrodeless lamp, 6... Lamp support rod, 7... Lamp fixing flange, 71... Insertion plate, 11... ...waveguide. In the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
内に配設された無電極ランプ、上記マイクロ波空
胴の空胴壁に設けられ、導波管より供給されるマ
イクロ波を上記マイクロ波空胴に結合させる給電
口、及び上記給電口をまたぐように上記空胴壁に
配設され、上記無電極ランプを支持するランプ支
持棒を固定するランプ固定フランジを備えたもの
において、上記ランプ固定フランジが給電口部分
の集中電界を避けるように、上記給電口をなす面
と上記ランプ固定フランジの上記給電口に対向す
る面とを離なす手段を設けたことを特徴とするマ
イクロ波放電光源装置。 ２ ランプ固定フランジを誘電体の挿入板を介し
て空胴壁に固定した特許請求の範囲第１項記載の
マイクロ波放電光源装置。 ３ ランプ固定フランジの給電口に対向する面に
凹部を設けた特許請求の範囲第１項又は第２項記
載のマイクロ波放電光源装置。[Claims] 1. A microwave cavity, an electrodeless lamp disposed inside the microwave cavity, and an electrodeless lamp disposed in the cavity wall of the microwave cavity and supplied from a waveguide. A power supply port that couples microwaves to the microwave cavity, and a lamp fixing flange that is disposed on the cavity wall so as to straddle the power supply port and that fixes a lamp support rod that supports the electrodeless lamp. The lamp fixing flange is characterized by being provided with means for separating a surface forming the power feed port and a surface of the lamp fixing flange facing the power feed port so that the lamp fixing flange avoids a concentrated electric field at the power feed port portion. Microwave discharge light source device. 2. The microwave discharge light source device according to claim 1, wherein the lamp fixing flange is fixed to the cavity wall via a dielectric insertion plate. 3. The microwave discharge light source device according to claim 1 or 2, wherein a recess is provided on the surface of the lamp fixing flange facing the power supply port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27755984A JPS61158662A (en) | 1984-12-28 | 1984-12-28 | Microwave discharge light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27755984A JPS61158662A (en) | 1984-12-28 | 1984-12-28 | Microwave discharge light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61158662A JPS61158662A (en) | 1986-07-18 |
| JPH0461460B2 true JPH0461460B2 (en) | 1992-09-30 |
Family
ID=17585207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27755984A Granted JPS61158662A (en) | 1984-12-28 | 1984-12-28 | Microwave discharge light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61158662A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5844376A (en) * | 1996-07-11 | 1998-12-01 | Osram Sylvania Inc. | Electrodeless high intensity discharge lamp with split lamp stem |
-
1984
- 1984-12-28 JP JP27755984A patent/JPS61158662A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61158662A (en) | 1986-07-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |