JP2002164188A - Microwave electrodeless discharge lamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microwave electrodeless discharge lamp device that suppresses microwave by a simple structure by using a metal tube body instead of using a metal mesh for leading out the light and that has a good utilization rate of light. SOLUTION: The microwave energy that is generated by the microwave power source 1 is introduced in a microwave resonator 3 through a microwave guiding means 2 and a microwave joining means 4. In the microwave resonator 3, the microwave energy resonates in the resonating frequency that the microwave resonator 3 has and generates a strong microwave electric field. A bulb 5, that is arranged in this microwave electric field, starts microwave discharge and generates a plasma light by this microwave discharge. The light generated in the bulb 5 is led to the outside of the microwave resonator 3 through the inside of a metal tube body 7 and discharge of the microwave to the outside is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave electrodeless discharge lamp device.

[0002]

2. Description of the Related Art As a conventional microwave electrodeless discharge lamp device, there is a device using a metal cavity resonator as disclosed in Japanese Patent Application Laid-Open No. 59-86153. This is an electrodeless discharge lamp in which microwave energy is resonated using a cavity resonator, and a discharge medium such as a rare gas or metal is sealed inside a translucent member such as quartz glass inside the cavity resonator. (Bulb) is disposed inside the metallic cavity resonator. High-frequency energy generated from a microwave oscillator such as a magnetron propagates through a waveguide such as a waveguide, and is coupled to a cavity resonator by a coupling slot. The microwave introduced into the cavity resonator resonates at the resonance frequency of the cavity resonator, generating a strong microwave electric field inside the cavity resonator, and the microwave electric field is generated inside the electrodeless discharge lamp by the microwave electric field. Generate.
The plasma light generated by the microwave discharge is led to the outside via a shielding metal mesh.

Next, in Japanese Patent Application Laid-Open No. 2-98096,
The electric field intensity of the electric field generated in the central axis direction of the cylindrical resonator by generating the standing wave of the TM010 mode is increased by lowering the height of the cylindrical resonator, and using a small valve of 1.3 cm or less. An electrodeless discharge lamp device capable of emitting light with high efficiency is disclosed. In this case also,
As in the case of 86153, the plasma light generated by the microwave discharge is led to the outside via the metal mesh forming the resonator.

[0004] Also, Japanese Patent Application Laid-Open No. 55-102169,
JP-A-60-189860, JP-A-62-061
No. 261 and Japanese Unexamined Patent Publication No. 05-062649, a non-electrode discharge is generated using a reentrant type resonator. A reentrant type resonator can generate a high electric field in a relatively small area to efficiently light a small bulb, but even in this case, the plasma light generated by the microwave discharge is one of the resonators. It is structured to be led out through a metal mesh forming the part.

[0005] As described above, the conventional microwave electrodeless discharge lamp device has a structure in which plasma light generated inside the resonator is led out through the metal mesh.

[0006]

However, the metal mesh for guiding the plasma light generated inside the resonator to the outside needs to reduce the transmittance by partially reflecting the plasma light to be led to the outside ( Hereinafter, it is referred to as light shading), high cost of the metal mesh, difficulty in connecting the metal mesh to the resonator main body, and weakening the mesh strength when the mesh of the metal mesh is thinned to improve light transmittance. There were problems such as things.

Light shading leads to a decrease in efficiency, and a fine mesh having less light shaking increases the cost and reduces the mesh strength. In particular, JP-A-55-
In the case of Japanese Patent No. 102169 or JP-A-2-98096, since the bulb is used in the vicinity of the metal mesh, the temperature becomes high due to the radiant heat from the bulb, and the metal mesh is deformed. It leads to reduction and light flux deterioration.

The present invention has been made in view of the above circumstances, and has as its object to suppress microwaves with a simple structure by using a metal cylinder instead of a metal mesh to extract light. Another object of the present invention is to provide a microwave electrodeless discharge lamp device having good light utilization.

[0009]

According to the first aspect of the present invention, there is provided a means for generating microwave energy, a microwave resonator to which the microwave energy is introduced and which resonates the microwave energy, Coupling means for coupling the microwave energy from the means for generating the microwave energy to the microwave resonator; a bulb disposed within the microwave resonator and containing a luminescent substance therein; One end of the metal cylinder is open inside the microwave resonator, and the other end is open outside the microwave resonator. The metal cylinder suppresses emission of the microwave energy, transmits light emitted from the bulb, and guides the light out of the microwave resonator.

According to a second aspect of the present invention, in the first aspect of the present invention, one end of the metal cylinder that opens into the microwave resonator is disposed at a position close to the valve. It is characterized by the following.

According to a third aspect of the present invention, in the first aspect of the present invention, one end of the metal cylinder opening into the microwave resonator is located at a position where a part of the valve is covered. It is characterized by being arranged.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a metal stub is provided at a position near the valve in the microwave resonator.

According to a fifth aspect of the present invention, in any one of the first to third aspects of the present invention, the light reflecting means for surrounding the surface of the bulb and guiding the light emitted from the bulb to the inside of the metal cylinder is provided. , Provided in a microwave resonator.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the metal stub is provided on an axis of the metal cylinder, and is provided between the metal stub and the metal cylinder.
Light reflecting means for guiding light emitted from the bulb to the inside of the metal cylinder is provided.

According to a seventh aspect of the present invention, in any one of the first to fourth aspects of the present invention, light reflecting means for guiding the light emitted from the bulb into the metal cylinder is provided on the inner surface of the microwave resonator. It is characterized by being provided.

According to an eighth aspect of the present invention, in the first or second aspect of the present invention, at least two metal cylinders are provided, and one of the metal cylinders that opens into the microwave resonator. Is arranged at a position close to the valve.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, there are provided two metal cylinders, and the two metal cylinders are arranged on a straight line through the center of the valve. It is characterized by being provided respectively through the valve.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, one end of each of the metal cylinders opening into the microwave resonator is connected to each other by an insulator cylinder. The inner surface of the insulator-made cylinder is provided with a light reflecting means for guiding light emitted from the bulb into the interior of the metal-made cylinder.

According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, a small hole is formed in one end of the metal cylinder that opens into the microwave resonator. It is characterized by being covered by a plate made of a conductor.

According to a twelfth aspect of the present invention, in any one of the first to tenth aspects, a small hole is formed in one end of the metal cylinder that opens into the microwave resonator. It is characterized by being covered with a plate made of an insulator.

According to a thirteenth aspect of the present invention, in any one of the first to twelfth aspects, an optical unit for condensing light emitted from the bulb is provided inside the metal cylinder.

According to a fourteenth aspect of the present invention, in any one of the first to twelfth aspects, an optical unit for condensing light emitted from the bulb is provided outside the metal cylinder.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) The configuration of Embodiment 1 is shown in FIG. The microwave electrodeless discharge lamp device of the first embodiment includes a microwave resonator 3 formed in a hollow substantially rectangular parallelepiped shape, a microwave coupling means 4 provided substantially at the center of the upper surface of the microwave resonator 3, and both ends. A microwave power source 1 connected to a microwave resonator 3 via a microwave waveguide means 2 formed in a substantially rectangular parallelepiped shape having an opening in the microwave resonator 3; A bulb 5 which is supported by a correspondingly provided bulb supporting rod 6 and contains a luminescent substance therein, and a metal cylinder 7 protruding outwardly at the approximate center of the side face of the microwave resonator 3. Is done.

The metal cylinder 7 is formed in a cylindrical shape, and one end is opened on the inner side surface of the microwave resonator 3, and the other end is opened on the outside of the microwave resonator 3. It is electrically connected to the wave resonator 3.

The microwave energy generated by the microwave power supply 1 is introduced into the microwave resonator 3 via the microwave guiding means 2 and the microwave coupling means 4.
In the microwave resonator 3, the microwave energy resonates at the resonance frequency of the microwave resonator 3,
Generates a strong microwave electric field. The bulb 5 placed in this microwave electric field starts microwave discharge,
Plasma light is generated by this microwave discharge. The light generated by the bulb 5 passes through the inside of the metal cylinder 7,
It is led out of the microwave resonator 3.

Next, the leakage of microwaves from the metal cylinder 7 when the metal cylinder 7 is used without using the metal mesh as shown in the first embodiment will be described. The metal cylinder 7 is a small-diameter waveguide, and gives a large amount of attenuation to microwaves having a frequency lower than the cutoff frequency, as is well known. When the length of the metal cylinder 7 is sufficient to function as a waveguide, that is, the length of the metal cylinder 7 is approximately six times or more the cross-sectional diameter thereof, the attenuation amount is 160 db or more. Therefore, the amount of leakage of the microwave to the outside of the microwave resonator 3 is weak, the influence on the human body is completely eliminated, and the metal cylinder 7 has a function of suppressing the emission of the microwave.

(Embodiment 2) The configuration of Embodiment 2 is shown in FIG. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 2, the microwave power supply 1, the microwave waveguide 2, and the microwave coupling unit 4 are omitted.

The metal cylinder 7 is formed in a cylindrical shape, penetrates through the side face of the microwave resonator 3, and protrudes from the inside face and the outside face of the microwave resonator 3. It is provided substantially at the center of the side surface.

The valve 5 is supported by a valve support rod 6 on the bottom surface of the microwave resonator 3 near the side opposite to the side surface of the microwave resonator 3 provided with the metal cylinder 7, One end of the body 7 opens close to the bulb 5 so that microwave energy can be concentrated near the bulb 5.

As described in the first embodiment,
In order to attenuate the amount of microwave leakage outside the microwave resonator 3, the metal cylinder 7 needs to have a certain length or more. In the second embodiment, since a part of the metal cylinder 7 is inside the microwave resonator 3, the length of the metal cylinder 7 protruding outside the microwave resonator 3 is equal to the length of the first embodiment. It can be shorter than.

As disclosed in Japanese Patent Application Laid-Open No. 55-102169, a reentrant type comprising a circular outer cylinder and an inner cylinder provided coaxially with the outer cylinder. Using a microwave resonator called
In the microwave resonator, the microwave electric field concentrates in a narrow region between the opposed outer cylinder bottom and the inner cylinder bottom, so that a small-diameter valve 5 can be used and the resonance frequency can be easily adjusted. Can be

The metal cylinder 7 may be arranged so that the opening at one end of the metal cylinder 7 covers a part of the valve 5.

(Embodiment 3) The configuration of Embodiment 3 is shown in FIG. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 3, the microwave power supply 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

A rod-shaped metal stub 8 protrudes from substantially the center of one of the inner surfaces of the microwave resonator 3, and a bulb containing a light-emitting substance therein is provided by a valve support rod 6 provided at an end of the metal stub 8. 5 is supported. By providing the metal stub 8 in the microwave resonator 3, the microwave energy can be concentrated on a relatively small area near the bulb 5.

The metal cylinder 7 is formed in a cylindrical shape, penetrates the other side surface of the microwave resonator 3, and protrudes from the microwave resonator 3 with both the inner side surface and the outer side surface protruding. 3 is provided substantially at the center of the side surface. In addition, one end of the metal cylinder 7 is opened close to the bulb 5 so that microwave energy can be concentrated near the bulb 5.

(Embodiment 4) The configuration of Embodiment 4 is shown in FIG. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 4, the microwave power supply 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

A rod-shaped metal stub 8 protrudes substantially at the center of one of the inner surfaces of the microwave resonator 3, and a bulb containing a luminescent substance therein is provided by a valve support rod 6 provided at an end of the metal stub 8. 5 is supported. The bulb 5 is located near the other inner surface of the microwave resonator 3, and the periphery of the bulb 5 reflects light emitted from the bulb 5 provided inside a cylinder having an opening at one end and an end face at the other end. The light is reflected by light reflecting means 9.

The light reflecting means 9 is provided with one end having an opening facing the upper surface of the microwave resonator 3.
A metal cylindrical body 7 protrudes from the upper surface of the microwave resonator 3 corresponding to the opening. The metal cylindrical body 7 is formed in a cylindrical shape, and is provided on the upper surface of the light reflecting means 9 so as to protrude from the outer surface of the microwave resonator 3.

The light generated by the bulb 5 is guided to one end of the metal cylinder 7 while being repeatedly reflected on the inner surface of the light reflection means 9, and passes through the inside of the metal cylinder 7 to the microwave resonator 3.
Led out. At this time, the light generated by the bulb 5 is
The light is efficiently led to one end of the metal cylinder 7 by the light reflecting means 9.

(Embodiment 5) The configuration of Embodiment 5 is shown in FIG. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 5, the microwave power supply 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

A rod-shaped metal stub 8 protrudes substantially at the center of one of the inner surfaces of the microwave resonator 3, and a bulb containing a luminescent substance therein is provided by a valve support rod 6 provided at an end of the metal stub 8. 5 is supported. The valve 5 is located substantially at the center of the inside of the microwave resonator 3.
It is surrounded by light reflecting means 9 for reflecting light provided inside the cylinder. The opening at one end of the light reflecting means 9 is closed by the metal stub 8. One end of a cylindrical metal cylinder 7 is connected to the opening at the other end.

The metal cylinder 7 is formed in a cylindrical shape, is provided coaxially with the metal stub 8, penetrates the side face of the microwave resonator 3, and has both the inner side face and the outer side face of the microwave resonator 3. The microwave resonator 3 is provided substantially at the center of the side face in a protruding state.

The light generated by the bulb 5 is guided to one end of the metal cylinder 7 while being repeatedly reflected on the inner surface of the light reflection means 9, and passes through the inside of the metal cylinder 7 to the microwave resonator 3.
Led out. At this time, the light generated by the bulb 5 is
The light is efficiently led to one end of the metal cylinder 7 by the light reflecting means 9.

(Embodiment 6) The configuration of Embodiment 6 is shown in FIG. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 6, the microwave power source 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

The microwave resonator 3 is formed in a hollow, substantially spherical crown shape, and serves as a light reflecting means 10 having an inner surface formed by a reflecting mirror. One end of a metal cylinder 7 formed in a cylindrical shape is connected to substantially the center of the plane portion of the microwave resonator 3. The other end of the metal cylinder 7 is located outside the microwave resonator 3, and the metal cylinder 7 protrudes on the outer surface of the microwave resonator 3. A rod-shaped metal stub 8 is provided on the inner curved surface of the microwave resonator 3 so as to project coaxially with the metal cylinder 7, and emits light internally by a valve support rod 6 provided at an end of the metal stub 8. A valve 5 containing the substance is supported.

The light generated by the bulb 5 is reflected by the light reflecting means 10.
Is reflected by the microwave resonator 3, and is guided to one end of the metal cylinder 7 through the inside of the metal cylinder 7.
Led out. At this time, the light generated by the bulb 5 is
The light is efficiently guided to one end of the metal cylinder 7 by the light reflecting means 10.

(Seventh Embodiment) FIG. 7 shows the configuration of the seventh embodiment. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 7, the microwave power source 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

In the seventh embodiment, two metal cylinders 7 are provided. Each metal cylinder 7 is formed in a cylindrical shape, and penetrates both side surfaces of the microwave resonator 3. In a state where both the inner side surface and the outer side surface of the microwave resonator 3 protrude, they are provided coaxially at substantially the centers of both side surfaces of the microwave resonator 3.

The valve 5 is supported by a valve support rod 6 at substantially the center on the bottom surface of the microwave resonator 3.
Light that is provided coaxially with the metal cylinders 7 and 7 and is generated by the bulb 5 is guided out of the microwave resonator 3 through the inside of each of the metal cylinders 7 and 7 so that 2 Light can be extracted from three places.

In the seventh embodiment, the number of metal cylinders 7 is two, but may be two or more.

(Eighth Embodiment) FIG. 8 shows the configuration of the eighth embodiment. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 8, the microwave power source 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

The eighth embodiment has substantially the same configuration as that of the seventh embodiment. An insulating cylinder is provided between the metal cylinders 7, 7 and coaxially with each other. The difference is that it is surrounded by light reflecting means 9 provided on the inner surface of the cylindrical body of the insulator. The openings at both ends of the light reflecting means 9 are connected to the ends of the metal cylinders 7, 7, and the light generated by the bulb 5 efficiently reflects the light from the two metal cylinders 7, 7 by the light reflecting means 9. It is led to one end, and is led out of the microwave resonator 3 from two places through the inside of each of the metal cylinders 7 and 7.

(Embodiment 9) The configuration of Embodiment 9 is shown in FIG. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 9, the microwave power supply 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

The ninth embodiment has substantially the same structure as that of the second embodiment. One end of the metal cylinder 7 opening inside the microwave resonator 3 is made of a conductor plate or an insulator plate. It is closed, and a small hole (aperture) 11 is provided substantially at the center of the closed surface.
The difference is that the light emitting area of the light led out of the microwave resonator 3 is made relatively small due to the perforation.

(Embodiment 10) FIG. 10 shows the configuration of the tenth embodiment. The same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Note that, in FIG. 10, the microwave power supply 1, the microwave waveguide unit 2, and the microwave coupling unit 4 are omitted.

The tenth embodiment has substantially the same configuration as that of the ninth embodiment except that an optical means 12 for condensing the light emitted from the bulb 5 is provided inside the metal cylinder 7.
The optical means 12 is composed of a lens, and the light emitted from the bulb 5 guided through a small hole (aperture) 11 formed substantially at the center of a closed surface provided at one end of the metal cylinder 7. , Light distribution control according to various purposes can be performed.

Although the optical means 12 is provided inside the metal cylinder 7 in the tenth embodiment, it may be provided outside the metal cylinder 7.

(Embodiment 11) Embodiment 11 is an example in which the present invention is applied to an optical fiber illumination system, and the configuration is shown in FIG. The microwave power supply 1 is connected via a microwave waveguide means 2 and a microwave coupling means 4 to a copper microwave resonator 3 formed in a cylindrical shape. A valve support bar 6 is provided at substantially the center of one planar inner surface of the microwave resonator 3, and a bulb 5 containing a light emitting substance is supported inside. Aperture 1 at one end
A light reflecting means 9 for reflecting light inside a cylinder having an end face with a hole 1 is protruded coaxially with the microwave resonator 3 at substantially the center of the inner surface, and the periphery of the bulb 5 is surrounded by the light reflecting means 9. Have been.

A cylindrical metal body 7 formed in a cylindrical shape is provided coaxially with the microwave resonator 3 formed in a cylindrical shape.
One end of the metal cylindrical body 7 penetrates the side face of the microwave resonator 3, and one end of the metal cylinder 7 is connected to the end face of the light reflecting means 9 in which the small hole (aperture) 11 is formed. Vessel 3
And is connected to the optical fiber 13. An optical unit 12 composed of a lens for condensing light emitted from the bulb 5 is provided inside the metal cylinder 7.

The microwave energy generated by the microwave power supply 1 is introduced into the microwave resonator 3 via the microwave guiding means 2 and the microwave coupling means 4.
In the microwave resonator 3, the microwave energy resonates at the resonance frequency of the microwave resonator 3,
Generates a strong microwave electric field. In the eleventh embodiment, a microwave resonator 3 formed in a cylindrical shape,
Since the reentrant resonator is constituted by the metal resonator 7 provided coaxially with the microwave resonator 3, the microwave resonator 3 and the metal cylinder 7 in the microwave resonator 3 are formed.
A maximum electric field is generated between the ends. By arranging the valve 5 at the position where the maximum electric field is generated, the valve 5
Starts microwave discharge, and generates plasma light by the microwave discharge.

The light generated by the bulb 5 is efficiently guided into the metal cylinder 7 by the light reflecting means 9. At this time, the light emission area to the metal cylinder 7 is restricted by the small holes (aperture) 11. The light guided to the inside of the metal cylinder 7 is collected by the optical unit 12, and the collected light reaches the optical fiber 13 via the interior of the metal cylinder 7 and passes through the optical fiber 13. It is led out of the microwave resonator 3.

For a conventional fiber optic lighting system,
In order to focus the light on an optical fiber, a small-diameter light source (point light source) having a diameter of about 5 mm or less, such as a mini-halogen lamp or a short metal halide lamp, which is easy to control the light distribution by a reflector or the like, is required. However, the mini-halogen lamp has a very short life (2000 hours or less), a luminous flux of about several thousand lumens, and has a disadvantage that a large luminous flux cannot be obtained. The short metal halide lamp can obtain a large luminous flux, but has a disadvantage of a short life (2,000 hours or less). This is because the lamp load increases because a small-diameter bulb is used to realize a point light source.

However, according to the eleventh embodiment,
Since the bulb itself does not need to have a small diameter (point light source), it is possible to increase the luminous flux, and the life of the lamp is extended to tens of thousands of hours because of electrodeless lighting without electrodes inside the bulb.

Specific numbers in the eleventh embodiment are as follows:
The inner diameter of the microwave resonator 3 is 40 mm and the length is 40 m
m, the diameter of the bulb 5 is 10 mm, the diameter of the aperture at the end of the light reflecting means 9 is 4 mm, and the diameter of the optical fiber 13 is 7 mm.
It is.

The size of the metal cylinder 7 is, for example, 2.4.
In the case of a microwave of 5 GHz, the cutoff frequency is set to 2.45 GHz.
Hz, the diameter is 7.14 (cm).
It is necessary to select a value sufficiently smaller than this diameter. In the case of the eleventh embodiment, if the diameter of the bulb 5 is 10 mm and the diameter of the metal cylinder 7 is about 10 mm, the cutoff frequency becomes sufficiently high, and the total length of the metal cylinder 7 is 60 mm.
By doing so, there is no problem of microwave leakage.

As described above, according to the eleventh embodiment, a high-quality light source having a large luminous flux and a long life can be realized in the optical fiber illumination system.

As the non-conductive light reflecting material forming the light reflecting means 9 disposed around the bulb 5, ceramics such as alumina can be used, and other glassy substances such as Pyrex (registered trademark) and quartz, Metal oxides such as alumina and mica can be used.

In the eleventh embodiment, a reentrant cylindrical resonator is exemplified as the resonator, but the resonator may have another shape such as a square shape. Further, the metal cylinder 7 has a circular cross section, but may have a rectangular shape or another shape. Although the shape of the valve 5 is illustrated as a sphere, it may be a shape other than a sphere, such as a cylindrical shape. Further, the shape of the small hole (aperture) 11 for taking out light can be any shape other than the circular shape, and the end of the metal cylinder 7 having the small hole (aperture) 11 is made of a conductor or an insulator. Either one works the same.

Note that the entirety of the metal cylinder 7 may be arranged so as to protrude inside the microwave resonator 3 so that the metal cylinder 7 does not protrude outside the microwave resonator 3.

[0071]

According to the first aspect of the present invention, there is provided means for generating microwave energy, a microwave resonator into which the microwave energy is introduced to resonate the microwave energy, and means for generating the microwave energy. Coupling means for coupling the microwave energy from the microwave resonator to the microwave resonator; a bulb disposed in the microwave resonator and containing a light-emitting substance therein; and a metal protruding from the microwave resonator. And a cylindrical body,
One end of the metal cylinder opens into the microwave resonator, the other end opens outside the microwave resonator, and the metal cylinder transmits the microwave energy. Since the emission is suppressed and the light emitted by the bulb is transmitted and led out of the microwave resonator, a metal tube is used instead of a metal mesh to guide the light. There is an effect that it is possible to provide a microwave electrodeless discharge lamp device which suppresses waves and has a good light utilization factor.

According to a second aspect of the present invention, in the first aspect of the present invention, one end of the metal cylinder that opens into the microwave resonator is disposed at a position close to the valve. Therefore, there is an effect that the microwave energy can be concentrated near the bulb.

According to a third aspect of the present invention, in the first aspect of the present invention, one end of the metal cylinder opening into the microwave resonator is located at a position where a part of the valve is covered. Since they are arranged, there is an effect that microwave energy can be concentrated near the bulb.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a metal stub is provided at a position in the microwave resonator close to the valve, so that the microwave energy can be compared with the value near the valve. There is an effect that it is possible to concentrate on a relatively small area.

According to a fifth aspect of the present invention, in any one of the first to third aspects of the present invention, the light reflecting means for surrounding the surface of the bulb and guiding the light emitted from the bulb to the inside of the metal cylinder is provided. Since it is provided in the microwave resonator, there is an effect that light emitted from the bulb can be efficiently guided into the inside of the metal cylinder.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the metal stub is provided on an axis of the metal cylinder, and is provided between the metal stub and the metal cylinder.
Since the light reflecting means for guiding the light emitted from the bulb to the inside of the metal cylinder is provided, there is an effect that the light emitted from the bulb can be efficiently guided to the interior of the metal cylinder.

According to a seventh aspect of the present invention, in any one of the first to fourth aspects of the present invention, light reflecting means for guiding the light emitted from the bulb into the metal cylinder is provided on the inner surface of the microwave resonator. Since it is provided, there is an effect that light emitted from the bulb can be efficiently guided into the inside of the metal cylinder.

According to an eighth aspect of the present invention, in the first or second aspect of the present invention, at least two metal cylinders are provided, and one of the metal cylinders opened in the microwave resonator. Is located at a position close to the bulb, so that microwave energy can be concentrated near the bulb and light can be extracted to two or more locations.

According to a ninth aspect of the present invention, in accordance with the eighth aspect of the present invention, there are provided two metal cylinders, and the two metal cylinders are arranged on a straight line through the center of the valve. Since each is provided via the bulb, microwave energy can be concentrated near the bulb, and light can be efficiently led out to two or more locations.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, one end of each of the metal cylinders opening into the microwave resonator is connected to each other by an insulator cylinder. Since the inner surface of the insulator-made cylinder is provided with light reflecting means for guiding light emitted from the bulb to the inside of the metal-made cylinder, the light emitted from the bulb is transmitted to the inside of the metal cylinder. Has the effect that it can be efficiently guided.

According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, a small hole is formed in one end of the metal cylindrical body that opens into the microwave resonator. Since it is covered by a plate made of a conductor, there is an effect that the light emitting area of the derived light can be reduced.

According to a twelfth aspect of the present invention, in any one of the first to tenth aspects, a small hole is formed at one end of the metal cylinder that opens into the microwave resonator. Since it is covered by a plate made of an insulator, there is an effect that the emission area of the derived light can be reduced.

According to a thirteenth aspect of the present invention, in any one of the first to twelfth aspects, an optical means for condensing light emitted from the bulb is provided inside the metal cylinder, so that the light emitted from the bulb is provided. There is an effect that light distribution control according to various purposes can be performed on the generated light.

According to a fourteenth aspect of the present invention, in any one of the first to twelfth aspects of the present invention, an optical means for condensing light emitted from the bulb is provided outside the metal cylinder, so that the light emitted from the bulb is provided. There is an effect that light distribution control according to various purposes can be performed on the generated light.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.

FIG. 6 is a diagram showing a sixth embodiment of the present invention.

FIG. 7 is a diagram showing a seventh embodiment of the present invention.

FIG. 8 is a diagram showing an eighth embodiment of the present invention.

FIG. 9 is a diagram showing a ninth embodiment of the present invention.

FIG. 10 is a diagram showing a tenth embodiment of the present invention.

FIG. 11 is a diagram showing an eleventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microwave power supply 2 Microwave waveguide means 3 Microwave resonator 4 Microwave coupling means 5 Valve 6 Valve support rod 7 Metal cylinder

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Eiji Shiohama 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. F-term (reference) 3K072 AA17 GB07

Claims (14)

[Claims] 1. A means for generating microwave energy, a microwave resonator into which the microwave energy is introduced and configured to resonate the microwave energy, and a means for generating the microwave energy from the means for generating microwave energy. Coupling means for coupling to the microwave resonator, a valve disposed inside the microwave resonator and containing a luminescent substance therein, and a metal cylinder protruding from the microwave resonator. One end of the metal cylinder opens into the microwave resonator, the other end opens outside the microwave resonator, and the metal cylinder holds the microwave energy. Suppress the release of
A microwave electrodeless discharge lamp device, wherein light emitted by the bulb is transmitted and led out of the microwave resonator. 2. The microwave according to claim 1, wherein one end of the metal cylinder that opens into the microwave resonator is disposed at a position close to the valve. Electrodeless discharge lamp device. 3. The valve according to claim 1, wherein one end of the metallic cylinder opening into the microwave resonator is arranged at a position where a part of the valve is covered. The microwave electrodeless discharge lamp device as described in the above. 4. The microwave electrodeless discharge lamp device according to claim 1, wherein a metal stub is provided at a position close to the bulb in the microwave resonator. 5. A microwave resonator surrounding the surface of the bulb and guiding light emitted from the bulb to the inside of the metal cylinder is provided in the microwave resonator. The microwave electrodeless discharge lamp device according to any one of claims 1 to 3. 6. The metal stub is provided on an axis of the metal cylinder, and emits light emitted by the bulb between the metal stub and the metal cylinder. 5. The microwave electrodeless discharge lamp device according to claim 4, further comprising light reflecting means for guiding the inside of the microwave. 7. The microwave resonator according to claim 1, wherein light reflecting means for guiding light emitted from the bulb into the metal cylinder is provided on an inner surface of the microwave resonator. Microwave electrodeless discharge lamp device. 8. The apparatus according to claim 1, wherein at least two metal cylinders are provided, and one end of each metal cylinder opening into the microwave resonator is disposed at a position close to a valve. The microwave electrodeless discharge lamp device according to claim 1 or 2, wherein: 9. The semiconductor device according to claim 1, further comprising two metal cylinders, wherein the two metal cylinders are respectively provided on the straight line passing through the center of the valve via the valve. 9. The microwave electrodeless discharge lamp device according to claim 8, wherein: 10. One end of each of the metal cylinders opening into the microwave resonator is connected to each other by an insulator cylinder, and an inner surface of the insulator cylinder is 10. The microwave electrodeless discharge lamp device according to claim 9, further comprising light reflecting means for guiding light emitted from the bulb to the inside of the cylindrical body made of both metals. 11. One end of the metal cylinder opening into the microwave resonator is covered with a plate made of a conductor having a small hole. 11. The microwave electrodeless discharge lamp device according to any one of 1 to 10. 12. One end of the metal cylinder opening into the microwave resonator is covered with a plate made of an insulator having small holes. 11. The microwave electrodeless discharge lamp device according to any one of 1 to 10. 13. The microwave electrodeless discharge lamp device according to claim 1, further comprising an optical means for condensing light emitted from the bulb inside the metal cylinder. 14. The microwave electrodeless discharge lamp device according to claim 1, further comprising an optical unit for condensing light emitted from the bulb outside the metal cylinder.