JP2011049026A - Light source device - Google Patents

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JP2011049026A
JP2011049026A JP2009196377A JP2009196377A JP2011049026A JP 2011049026 A JP2011049026 A JP 2011049026A JP 2009196377 A JP2009196377 A JP 2009196377A JP 2009196377 A JP2009196377 A JP 2009196377A JP 2011049026 A JP2011049026 A JP 2011049026A
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resonator
microwave
light
light source
source device
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Yosuke Kano
洋介 加納
Shigenori Kobayashi
茂法 小林
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Iwasaki Denki KK
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Iwasaki Denki KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device using microwaves, capable of achieving stability of discharge at lighting, ensuring a highly efficient discharge state, enhancing efficiency of using light with a loss of light restrained until its extraction, and suppressing production cost in a simple structure. <P>SOLUTION: The microwave light source device includes an arc tube (1) consisting of a microwave oscillator (5) and a microwave resonator (4) sealing discharge materials for discharging in the microwave resonator using the microwaves, and a reflecting mirror (2) consisting of a dielectric for extracting light from the arc tube outside the microwave resonator (4). The device also includes a light extraction port (11) on a resonator wall. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、マイクロ波を利用した照明及びプロジェクタ用光源装置に関する。 The present invention relates to illumination using a microwave and a light source device for a projector.

近年、マイクロ波を利用した光源装置は、放電空間に電極が無くても点灯ができ、封入物と電極の化学反応等による発光管内の黒化が抑えられるため、従来より長寿命な無電極照明装置として実用化されている。また、電極からの２次電子の放出が無くとも放電を維持でき、電極の損耗が少ないことからプロジェクタ等に使われる有電極の光源装置においても応用が勧められている。 In recent years, light source devices using microwaves can be lit even if there is no electrode in the discharge space, and since the blackening in the arc tube due to the chemical reaction between the encapsulated material and the electrode is suppressed, electrodeless illumination with a longer life than before It has been put into practical use as a device. In addition, since the discharge can be maintained without the emission of secondary electrons from the electrodes and the wear of the electrodes is small, application is also recommended in electroded light source devices used for projectors and the like.

図５に示す従来の光源装置は、第１のマイクロ波導波管に反射鏡形状の第２のマイクロ波導波管を接合し、反射鏡形状の焦点部分に無電極放電ランプを配置することで光の利用効率を改善している。（特許文献１参照） The conventional light source device shown in FIG. 5 has a reflector-shaped second microwave waveguide joined to a first microwave waveguide, and an electrodeless discharge lamp is disposed at the focal point of the reflector. The use efficiency is improved. (See Patent Document 1)

また、図６に示す従来の光源装置は、金属網状の共振器内での発光管の位置を変化させることができ、また共振調節部材により効率よく無電極電球を点灯できるとある。（特許文献２参照） Further, the conventional light source device shown in FIG. 6 can change the position of the arc tube in the metal mesh resonator and can turn on the electrodeless bulb efficiently by the resonance adjusting member. (See Patent Document 2)

特許第３１７３３６２号公報Japanese Patent No. 3173362 特許第４０９１５９６号公報Japanese Patent No. 4091596

本発明は、マイクロ波を利用した光源装置において点灯時の放電の安定性、効率の良い放電状態の確保と、光を取り出すまでの光のロスを抑えて光の利用効率を高めることと、光源装置の製作コストが嵩まない簡易な構成とすることを技術的課題としている。 In the light source device using the microwave, the present invention provides stability of discharge at the time of lighting, ensuring an efficient discharge state, suppressing light loss until light is extracted, increasing light use efficiency, It is a technical problem to provide a simple configuration that does not increase the manufacturing cost of the device.

課題を解決するために、請求項１のマイクロ波光源装置は、マイクロ波発振器とマイクロ波共振器からなり、前記マイクロ波共振器内にマイクロ波によって放電する放電物質を封入した発光管と前記発光管からの光を共振器の外へ取り出すための誘電体からなる反射鏡を備え、また、共振器壁に光取り出し口を備えていることを特徴とする。
請求項２のマイクロ波光源装置は、請求項１において、前記発光管は、耐熱容器でなる放電容器内に、少なくとも一つの電極が配置されると共に、放電物質が封入されており前記電極の軸方向が共振器内の電界の方向と平行であることを特徴とする。
請求項３のマイクロ波光源装置は、マイクロ波発振器とマイクロ波共振器からなり、前記マイクロ波共振器内にマイクロ波によって放電する放電物質を封入した発光管と前記発光管からの光を共振器の外へ取り出すための誘電体からなる反射鏡を備え、また、共振器壁に光取り出し口を備えており、さらに共振器内の少なくとも一つの壁がスライドできる構造となっていることを特徴とする。
請求項４のマイクロ波光源装置は、請求項１または請求項３において、前記マイクロ波共振器が基本モードだけで動作するように寸法が定められたことを特徴とする。


In order to solve the problems, a microwave light source device according to claim 1 is composed of a microwave oscillator and a microwave resonator, and an arc tube in which a discharge substance discharged by microwaves is enclosed in the microwave resonator and the light emission. A reflection mirror made of a dielectric for extracting light from the tube out of the resonator is provided, and a light extraction port is provided in the resonator wall.
A microwave light source device according to a second aspect is the microwave light source device according to the first aspect, wherein the arc tube has at least one electrode disposed in a discharge vessel made of a heat-resistant vessel, and a discharge substance is sealed therein. The direction is parallel to the direction of the electric field in the resonator.
The microwave light source device according to claim 3 comprises a microwave oscillator and a microwave resonator, an arc tube in which a discharge substance discharged by microwaves is enclosed in the microwave resonator, and light from the arc tube as a resonator. Characterized in that it is provided with a reflecting mirror made of a dielectric material to be taken out of the light source, a light extraction port is provided in the resonator wall, and at least one wall in the resonator is slidable. To do.
A microwave light source device according to a fourth aspect is characterized in that, in the first or third aspect, the dimension is determined so that the microwave resonator operates only in a fundamental mode.


本発明によれば、共振器内に誘電率の高い物質から成る光を取り出すための反射鏡を配置する構成としたことで波長短縮効果により共振器の長手方向の寸法を小さくでき、且つ共振器形状は矩形または、円筒形の単純な構造とすることで基本モードで動作させることができるため共振条件をとりやすく、最も電界強度が強くなる条件を得られた。さらに、光は共振器壁に設けた光取り出し口から取り出すため金属網を通過させる構造のような光ロスもなく、また簡易な構造であるため製作コストは嵩まない。 According to the present invention, since the reflector for taking out light made of a substance having a high dielectric constant is arranged in the resonator, the longitudinal dimension of the resonator can be reduced by the wavelength shortening effect, and the resonator Since the shape can be made to operate in the fundamental mode by adopting a simple structure such as a rectangle or a cylinder, it is easy to take the resonance condition, and the condition that the electric field strength is the strongest is obtained. Further, since light is extracted from the light extraction port provided in the resonator wall, there is no light loss as in the structure of passing through a metal net, and the manufacturing cost does not increase because of the simple structure.

本発明に係る光源装置の一例を示す図The figure which shows an example of the light source device which concerns on this invention 本発明に係る光源装置の一例を示す図The figure which shows an example of the light source device which concerns on this invention 本発明に係る光源装置の別の実施例を示す図The figure which shows another Example of the light source device which concerns on this invention 本発明に係る光源装置の別の実施例を示す略図Schematic diagram showing another embodiment of the light source device according to the present invention. 光源装置の光の利用効率を高めるための従来技術を示す図。The figure which shows the prior art for improving the utilization efficiency of the light of a light source device. 光源装置の照明効率を高めるための従来技術を示す図。The figure which shows the prior art for improving the illumination efficiency of a light source device.

本発明に係る光源装置の最良の実施形態は、マイクロ波発振器とマイクロ波共振器からなり、前記マイクロ波共振器内にマイクロ波によって放電する放電物質を封入した発光管と前記発光管からの光を共振器の外へ取り出すための誘電体からなる反射鏡を備え、さらに共振器壁に光取り出し口を備えている。 The best embodiment of the light source device according to the present invention comprises a microwave oscillator and a microwave resonator, an arc tube in which a discharge substance discharged by microwaves is enclosed in the microwave resonator, and light from the arc tube A reflecting mirror made of a dielectric material for taking out the light from the resonator, and a light extraction port on the resonator wall.

共振器は金属からなり、共振器内はマイクロ波発振器からのマイクロ波によって共振状態が形成されており、また、前記共振器の壁に光取り出し口が設けられている。共振器の形状は矩形または、円筒形の単純な構造とするのが好ましい。 The resonator is made of metal, and a resonance state is formed in the resonator by microwaves from a microwave oscillator, and a light extraction port is provided on the wall of the resonator. The shape of the resonator is preferably a rectangular or cylindrical simple structure.

反射鏡は耐熱ガラス、セラミックスなど誘電体からなり反射面にはＴｉＯ２等からなる多層膜が形成されている。 The reflecting mirror is made of a dielectric material such as heat-resistant glass or ceramics, and a multilayer film made of TiO 2 or the like is formed on the reflecting surface.

発光管は、その本体が耐熱性の容器で形成され、当該耐熱性容器の内部に、放電物質が封入されると共に、タングステン等の金属棒でなる対向する１対の電極が収容配設されている。なお、電極は１対の対向する構成に限らず、片側１つだけでも良いし、無くても良い。 The main body of the arc tube is formed of a heat-resistant container, and a discharge substance is enclosed in the heat-resistant container, and a pair of opposed electrodes made of a metal rod such as tungsten is accommodated and disposed. Yes. Note that the electrodes are not limited to a pair of opposing structures, but may be one on each side or may not be present.

本発明に係る光源装置の実施例を図１、図２に示す。図１に示す光源装置は、発光管１と、当該発光管１から放射される光を反射する凹面反射鏡２とマイクロ波励振アンテナ３を内部に配置している共振器４と前記共振器４と接続されたマイクロ波発振器５からなり、発光管１は、石英ガラスで成る放電容器６内に、一対のタングステン電極７Ｒ、７Ｌが約０．９ｍｍ程度の短い極間距離で対向して配置されると共に、水銀と臭素等のハロゲンとアルゴンガス等の始動用ガスとが封入され、その放電容器６から発光管１の両端に至る部分を気密に封止して各電極７Ｒ、７Ｌとこれに接続されたモリブデン箔で成る金属箔を封着した一対の電極封着部８Ｒ、８Ｌが形成されている。 An embodiment of a light source device according to the present invention is shown in FIGS. The light source device shown in FIG. 1 includes an arc tube 1, a resonator 4 in which a concave reflecting mirror 2 that reflects light emitted from the arc tube 1, and a microwave excitation antenna 3 are disposed, and the resonator 4. The arc tube 1 is disposed in a discharge vessel 6 made of quartz glass, with a pair of tungsten electrodes 7R and 7L facing each other with a short distance of about 0.9 mm. In addition, a starter gas such as mercury and bromine, such as mercury and bromine, and an argon gas are sealed, and the portions from the discharge vessel 6 to both ends of the arc tube 1 are hermetically sealed to each of the electrodes 7R and 7L. A pair of electrode sealing portions 8R and 8L are formed by sealing metal foils made of connected molybdenum foils.

凹面反射鏡２は、最外径φ４０ｍｍ程度の結晶化ガラスからなり、その底部に発光管１の片方の電極封着部８Ｒを挿通させてセメント等で固定するボトム孔が開口形成されると共に、その第１焦点６．８ｍｍ、第２焦点５３ｍｍの楕円形状反射部９にはＴｉＯ２、ＳｉＯ２の多層膜が形成されている。発光管１の発光部が凹面反射鏡２の焦点に配置されることで光を集光することができる。 The concave reflecting mirror 2 is made of crystallized glass having an outermost diameter of about 40 mm, and a bottom hole is formed at the bottom of the arc tube 1 so that one electrode sealing portion 8R is inserted and fixed with cement or the like. A multilayer film of TiO 2 and SiO 2 is formed on the elliptical reflector 9 having a first focal point of 6.8 mm and a second focal point of 53 mm. Light can be collected by arranging the light emitting portion of the arc tube 1 at the focal point of the concave reflecting mirror 2.

誘電体である凹面反射鏡２が共振器４内にあることで波長短縮効果により凹面反射鏡２がない場合に比べて共振器の寸法を小さくすることができるようになる。 Since the concave reflecting mirror 2 which is a dielectric is in the resonator 4, the size of the resonator can be reduced by the wavelength shortening effect as compared with the case without the concave reflecting mirror 2.

共振器４の内部にはφ３ｍｍ、長さ１０ｍｍのマイクロ波励振アンテナ３が配接されマイクロ波発振器５からの２．４５ＧＨｚのマイクロ波を共振器４内に供給しており、また共振器４はアルミニウム製であり高さ４０ｍｍ、幅８０ｍｍ、長さ９５ｍｍ程度の方形形状である。 A microwave excitation antenna 3 having a diameter of 3 mm and a length of 10 mm is arranged inside the resonator 4 to supply a 2.45 GHz microwave from the microwave oscillator 5 into the resonator 4. It is made of aluminum and has a square shape with a height of 40 mm, a width of 80 mm, and a length of about 95 mm.

共振モードは共振器の寸法で決定されるため共振器４は基本モードであるＴＥ１０１モードのみで動作しモード間の干渉による位相歪を生じることも無く、最も電磁界の強度が強い状態になり、その電界の方向は矢印１０の方向で存在する。また、発光管１の電極７Ｒ、７Ｌの軸方向はこの電界の方向と平行になるように配置されている。これにより、安定した放電が実現できる。 Since the resonance mode is determined by the dimensions of the resonator, the resonator 4 operates only in the TE101 mode, which is the basic mode, and does not cause phase distortion due to interference between the modes, so that the electromagnetic field strength is strongest. The direction of the electric field exists in the direction of the arrow 10. The axial directions of the electrodes 7R and 7L of the arc tube 1 are arranged so as to be parallel to the direction of the electric field. Thereby, stable discharge can be realized.

また、共振器４の壁にはΦ８ｍｍの光取り出し口１１が設けられており、凹面反射鏡２によって反射された光は前記光取り出し口１１を通り外部へ放射される。光取り出し口の大きさは使用するマイクロ波の波長と凹面反射鏡２の焦点により決定され、マイクロ波が共振器４から漏洩せず、且つ凹面反射鏡で集光された光が遮蔽されることの無い大きさとなり、２．４５ＧＨｚのマイクロ波を使用した場合φ１０ｍｍ以下の大きさであることが好ましい。 The wall of the resonator 4 is provided with a Φ8 mm light extraction port 11, and the light reflected by the concave reflecting mirror 2 is radiated to the outside through the light extraction port 11. The size of the light extraction port is determined by the wavelength of the microwave to be used and the focal point of the concave reflecting mirror 2, and the microwave does not leak from the resonator 4, and the light collected by the concave reflecting mirror is shielded. When the 2.45 GHz microwave is used, the size is preferably 10 mm or less.

よって、本構成を用いれば小型で簡易な構成であるため製作コストが嵩まない光の利用効率が高い光源装置が実現できる。 Therefore, if this configuration is used, a light source device with high light utilization efficiency that does not increase manufacturing costs because of a small and simple configuration can be realized.

次に、本発明に係る光源装置の別の実施例を図３、図４に示す。発光管１は図１の実施例
と同一の仕様である。斜線部で示した凹面反射鏡１２は高誘電率であるセラミックからな
り共振器４内をほぼ埋める大きさの立方体に楕円形状を削り出して、削り出した楕円面１
４に図１と同様の反射膜を塗布した構成となっている。共振器内の大部分を誘電体で占め
ることでさらに光源装置の小型化が可能となる。 Next, another embodiment of the light source device according to the present invention is shown in FIGS. The arc tube 1 has the same specifications as the embodiment of FIG. The concave reflecting mirror 12 shown by the hatched portion is made of ceramic having a high dielectric constant, and an elliptical shape is cut out into a cube having a size almost filling the inside of the resonator 4, and the cut elliptical surface 1 is cut out.
4 is coated with a reflective film similar to that shown in FIG. By occupying most of the resonator with a dielectric, the light source device can be further downsized.

また、共振器４の一方に金属板からなるスライド壁１３を設け、モーターなどで可動させ
共振器４の全長Ｄを変化させて共振状態を変化させることができるようにした。 In addition, a slide wall 13 made of a metal plate is provided on one side of the resonator 4 and can be moved by a motor or the like to change the total length D of the resonator 4 so that the resonance state can be changed.

これにより、発光管１の点灯時から安定時までのインピーダンスの変化、及び寿命中のイ
ンピーダンスの変化に対しても共振状態を変えることによって消灯や立消えが発生しない
安定した点灯が可能となった。 As a result, stable lighting without turning off or extinguishing can be realized by changing the resonance state with respect to the change in impedance from the lighting time to the stable time of the arc tube 1 and the change in impedance during the lifetime.

また、さらなる利点として発光管１、共振器４、及びマイクロ波発振器５等の構成部品の製造上の個体差によるインピーダンスマッチング条件の差も共振状態を変えることにより
解決された。 Further, as a further advantage, a difference in impedance matching conditions due to individual differences in manufacturing components such as the arc tube 1, the resonator 4, and the microwave oscillator 5 has been solved by changing the resonance state.

以上の実施例ではスライド壁13は一方にしか設けてないが他方にも追加で設けても良い。 In the above embodiment, the slide wall 13 is provided only on one side, but may be additionally provided on the other side.

本発明はマイクロ波を利用した照明及びプロジェクタ用光源装置に関するものである。


The present invention relates to illumination using a microwave and a light source device for a projector.


１・・・発光管
２・・・凹面反射鏡
３・・・マイクロ波励振アンテナ
４・・・共振器
５・・・マイクロ波発振器
６・・・放電容器
７Ｒ・・タングステン電極
７Ｌ・・タングステン電極
８Ｒ・・電極封着部
８Ｌ・・電極封着部
９・・・楕円反射部
１０・・・電界方向
１１・・・光取り出し口
１２・・・凹面反射鏡
１３・・・スライド壁
１４・・・楕円面 DESCRIPTION OF SYMBOLS 1 ... Light-emitting tube 2 ... Concave reflector 3 ... Microwave excitation antenna 4 ... Resonator 5 ... Microwave oscillator 6 ... Discharge vessel 7R / Tungsten electrode 7L / Tungsten electrode 8R ... Electrode sealing part 8L ... Electrode sealing part 9 ... Ellipse reflection part 10 ... Electric field direction 11 ... Light extraction port 12 ... Concave reflector 13 ... Slide wall 14 ...・ Oval surface

Claims (4)

マイクロ波発振器とマイクロ波共振器からなり、前記マイクロ波共振器内にマイクロ波によって放電する放電物質を封入した発光管と前記発光管からの光を共振器の外へ取り出すための誘電体からなる反射鏡を備え、また、共振器壁に光取り出し口を備えていることを特徴とするマイクロ波光源装置。 Consists of a microwave oscillator and a microwave resonator, an arc tube in which a discharge material discharged by microwaves is enclosed in the microwave resonator, and a dielectric for extracting light from the arc tube to the outside of the resonator A microwave light source device comprising a reflecting mirror and a light extraction port in a resonator wall. 前記発光管は、耐熱容器でなる放電容器内に、少なくとも一つの電極が配置されると共に、放電物質が封入されており前記電極の軸方向が共振器内の電界の方向と平行である請求項１に記載のマイクロ波光源装置。 The arc tube has at least one electrode disposed in a discharge vessel made of a heat-resistant vessel, is filled with a discharge substance, and the axial direction of the electrode is parallel to the direction of the electric field in the resonator. 2. The microwave light source device according to 1. マイクロ波発振器とマイクロ波共振器からなり、前記マイクロ波共振器内にマイクロ波によって放電する放電物質を封入した発光管と前記発光管からの光を共振器の外へ取り出すための誘電体からなる反射鏡を備え、また、共振器壁に光取り出し口を備えており、さらに共振器内の少なくとも一つの壁がスライドできる構造となっていることを特徴とするマイクロ波光源装置。 Consists of a microwave oscillator and a microwave resonator, an arc tube in which a discharge material discharged by microwaves is enclosed in the microwave resonator, and a dielectric for extracting light from the arc tube to the outside of the resonator A microwave light source device comprising a reflecting mirror, a light extraction port in a resonator wall, and a structure in which at least one wall in the resonator can slide. 前記マイクロ波共振器が基本モードだけで動作するように寸法が定められた請求項１または請求項３記載のマイクロ波光源装置。 The microwave light source device according to claim 1 or 3, wherein the microwave resonator is dimensioned so as to operate only in a fundamental mode.
JP2009196377A 2009-08-27 2009-08-27 Light source device Pending JP2011049026A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63250095A (en) * 1987-04-07 1988-10-17 三菱電機株式会社 Microwave discharge light source
JPH0298096A (en) * 1988-06-24 1990-04-10 Fusion Syst Corp Electrodeless lamp coupled with small bulb
JP2001202924A (en) * 2000-01-18 2001-07-27 Ushio Inc Electromagnetic energy excitation point light source apparatus
JP2005174938A (en) * 2003-12-13 2005-06-30 Lg Electronics Inc Electrodeless lamp system
JP2007080705A (en) * 2005-09-15 2007-03-29 Ushio Inc Microwave discharge lamp and microwave discharge light source device equipped with the microwave discharge lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63250095A (en) * 1987-04-07 1988-10-17 三菱電機株式会社 Microwave discharge light source
JPH0298096A (en) * 1988-06-24 1990-04-10 Fusion Syst Corp Electrodeless lamp coupled with small bulb
JP2001202924A (en) * 2000-01-18 2001-07-27 Ushio Inc Electromagnetic energy excitation point light source apparatus
JP2005174938A (en) * 2003-12-13 2005-06-30 Lg Electronics Inc Electrodeless lamp system
JP2007080705A (en) * 2005-09-15 2007-03-29 Ushio Inc Microwave discharge lamp and microwave discharge light source device equipped with the microwave discharge lamp

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