JP4757654B2 - Light source device - Google Patents

Description

  The present invention relates to a light source device that emits light by exciting a luminescent material enclosed in a light emitting cell with microwave energy.

  A light-emitting substance such as sulfur, mercury, Ar gas, or Xe gas is enclosed in a light-emitting cell made of quartz glass, and the light-emitting substance is caused to emit light by supplying microwaves to the inside of the light-emitting cell. As such a light source device, for example, the one shown in Patent Document 1 is known.

  In this specification, “light” is not limited to visible light, but also includes electromagnetic waves in regions other than visible light (eg, THz wave region, ultraviolet region). That is, the “light” generated by the light source device in this specification is an electromagnetic wave having a wavelength that can be generated by exciting the luminescent material with microwave energy (this depends on the type of the luminescent material). It means an electromagnetic wave with a sufficiently shorter wavelength than the above.

In Patent Document 1, a donut-shaped light emitting cell (lamp) is extrapolated around a central conductor at a central position in the axial direction of the resonator inside a coaxial resonator that resonates microwaves. There is disclosed a light source device that uniformly emits light from a luminescent material therein. Further, in Patent Document 1, a light emitting cell (lamp) that is curved so as to wrap around the tip of the central conductor is disposed near the tip of the central conductor inside the semi-coaxial resonator that resonates microwaves, A light source device is disclosed in which a light emitting substance in the light emitting cell is caused to emit light uniformly.
JP 2000-348684 A

  In the light source device as found in Patent Document 1, it is possible to uniformly emit light from the light emitting substance in the light emitting cell. However, in such a conventional light source device, in order to excite and emit as much as possible the entire luminescent material in the light emitting cell, the microwaves in the internal space (space in which the microwaves resonate) of the coaxial resonator or semi-coaxial resonator are used. A light emitting cell is locally provided at a location where the energy of the light becomes relatively high. For this reason, the energy of the microwave supplied to the resonator cannot be fully utilized. In other words, although the microwave energy is distributed over the entire internal space of the resonator (but not uniform), the light source device disclosed in Patent Document 1 uses the microwave energy at other locations than the light emitting cell at all. Will not be.

  In addition, in the light source device found in Patent Document 1, the mechanism for assembling and holding the light emitting cell in the coaxial resonator or the semi-coaxial resonator must be complicated, and as a result, the assembly of the light source device. There is a disadvantage that the work becomes difficult and the assembly cost increases. Furthermore, since a mechanism for holding the light emitting cell must be provided inside the coaxial resonator or the semi-coaxial resonator, the resonance frequency of the resonator may be shifted due to the mechanism.

  The present invention has been made in view of such a background, and increases the amount of light generated by increasing the utilization efficiency of the energy of the microwaves to be resonated as much as possible while simplifying the assembly structure of the light emitting cells. An object of the present invention is to provide a light source device capable of achieving the above.

  In order to achieve the above object, the first aspect of the light source device according to the present invention resonates in an internal space of a resonator in which a light emitting cell enclosing a light emitting material is accommodated, and the energy of the resonating microwaves In a light source device that emits light by exciting a luminescent substance in a light emitting cell, one surface of the plate conductor and the front and back surfaces of the plate conductor is an inner surface, and the other surface is an outer surface. A rod-shaped conductor insulated from the plate-shaped conductor from the inner surface of the conductor and extending in the normal direction of the plate-shaped conductor; and the plate-shaped conductor for inputting microwaves from the outer surface side to the inner surface side of the plate-shaped conductor The light emitting cell is formed in a cylindrical container shape whose both ends are closed, and the rod-shaped conductor is formed at the center of one end surface of the plate from the tip. Can be inserted coaxially with the light emitting cell up to the proximal end A recess hole formed by recessing the central portion of the one end surface, and at least the outer peripheral surface and the other end surface of the outer peripheral surface of the light emitting cell, the other end surface, and a surface of the one end surface excluding the peripheral portion of the recess hole. In addition, a thin conductor layer capable of transmitting the light generated by the luminescent material is fixed so as to cover the surface, and is attached to and detached from the plate-like conductor at the outer peripheral portion of one end surface side of the light emitting cell. An attachment member that can be freely connected is fixed, and the light emitting cell has the thin conductor layer formed by inserting the rod-like conductor coaxially into the recessed hole and connecting the attachment member to the plate-like conductor. Is attached detachably to the plate-like conductor while being electrically connected to the plate-like conductor, and is surrounded by the inner surface of the thin conductor layer, the inner surface of the plate-like conductor, and the outer peripheral surface and the front end surface of the rod-like conductor in the attached state. The internal space where microwaves resonate And characterized in that the microwave is resonated in the internal space of the configured semi-coaxial resonators the rod-shaped conductor as the center conductor and is supplied to the internal space from the microwave input part.

  According to the light source device of the first aspect, the rod-shaped conductor is coaxially inserted into the recessed hole of the light emitting cell, and the outer peripheral portion of the end portion on the one end surface side (opening side of the recessed hole) of the light emitting cell. By connecting the attachment member fixed to the plate conductor to the plate conductor, the light emitting cell is detachably attached to the plate conductor while the thin conductor layer is conducted to the plate conductor. By this attachment, a space surrounded by the inner surface of the thin conductor layer, the inner surface of the plate-shaped conductor, and the outer peripheral surface and the tip surface of the rod-shaped conductor is made an internal space for resonating microwaves, and the rod-shaped conductor is centered. A semi-coaxial resonator as a conductor is formed. In this case, almost the entire internal space of the semi-coaxial resonator is filled with the light emitting cells. For this reason, when microwaves are supplied from the microwave input section to the internal space of the semi-coaxial resonator and the microwaves are resonated in the internal space, almost all of the microwaves in the internal space are contained in the light emitting cell. It can be made to function as an energy source for excitation and emission of the luminescent material.

  The semi-coaxial resonator having the light emitting cell in the internal space is configured by simply inserting the rod-shaped conductor coaxially into the recessed hole of the light emitting cell and connecting the mounting member to the plate-shaped conductor. Therefore, the assembly of the semi-coaxial resonator and the assembly of the light emitting cell to the resonator can be easily performed with an extremely simple configuration without requiring a complicated assembly structure.

  Therefore, according to the light source device of the first aspect of the present invention, the use efficiency of the microwave energy to be resonated can be increased as much as possible while making the assembly structure of the light emitting cell a simple structure. The amount of light generated by the apparatus can be increased as much as possible.

  In the first aspect of the invention, the plate-like conductor is formed in a disc shape and has a male screw portion on the outer peripheral portion thereof, and the mounting member is a female screw that is screwed into the male screw portion of the plate-like conductor. It is preferable to connect the mounting member to the plate-like conductor by screwing the female screw portion to the male screw portion of the plate-like conductor.

  According to this, the light emitting cell can be obtained by simply rotating the mounting member together with the light emitting cell in the state where the rod-shaped conductor is inserted into the recessed hole and screwing it onto the male screw portion of the plate conductor. It can be connected to a plate-like conductor. Therefore, the assembly of the semi-coaxial resonator and the incorporation of the light emitting cell into the resonator can be performed very easily.

  In order to achieve the above object, the second aspect of the light source device of the present invention resonates in the internal space of the resonator in which the light emitting cell enclosing the light emitting material is accommodated, and the energy of the resonating microwave energy. In the light source device configured to excite the luminescent substance in the light emitting cell to emit light, one of the plate-like conductor and the front and back surfaces of the plate-like conductor is an inner surface, and the other surface is an outer surface, A rod-shaped conductor insulated from the plate-shaped conductor from the inner surface of the plate-shaped conductor and extending in the normal direction of the plate-shaped conductor; and the plate for inputting microwaves from the outer surface side to the inner surface side of the plate-shaped conductor A microwave input portion provided on the outer surface side of the conductor, and an annular conductive pressing member that can be attached to and detached from the rod conductor at the tip of the rod conductor, and the light emitting cell includes: Formed into a cylindrical container closed at both ends, A through-hole through which the rod-like conductor can be inserted so that the tip of the rod-shaped conductor protrudes toward the one end face of the light emitting cell is provided in the axial center of the light emitting cell, and the outer peripheral face, one end face and the other end face of the light emitting cell are provided. A thin conductor layer capable of transmitting light generated by the luminescent material is fixed to the surface excluding the peripheral portion of the through hole so as to cover the surface, and the light emitting cell has the rod-shaped conductor coaxially disposed in the through hole. The conductive pressing member is in contact with and connected to the thin conductor layer on the one end surface of the light emitting cell in a state where the thin conductor layer on the other end surface is in contact with and connected to the inner surface of the plate conductor. By attaching the conductive pressing member to the tip of the rod-shaped conductor protruding toward the one end surface of the light emitting cell, the conductive pressing member is sandwiched between the conductive pressing member and the plate-shaped conductor. In the state, the inner surface of the thin conductor layer, the inner surface of the plate conductor, and the rod A space surrounded by the outer peripheral surface of the conductor is an internal space that resonates the microwave, and a microwave that resonates in the internal space of the coaxial resonator that is configured with the rod-shaped conductor as a central conductor from the microwave input portion. It is characterized in that it is supplied to the space.

  According to the light source device of the second aspect, the rod-shaped conductor is coaxially inserted into the through hole of the light emitting cell, and the thin conductor layer on the other end surface of the light emitting cell is brought into contact with the inner surface of the plate-shaped conductor. The rod-shaped conductor that protrudes toward the one end surface of the light emitting cell so that the conductive pressing member contacts and conducts with the thin conductor layer on the one end surface of the light emitting cell in a conductive state. By mounting on the tip, the conductive pressing member and the plate conductor are sandwiched. By this clamping, a space surrounded by the inner surface of the thin conductor layer, the inner surface of the plate-shaped conductor, and the outer peripheral surface of the rod-shaped conductor is used as an internal space for resonating microwaves, and the rod-shaped conductor is used as a central conductor. A coaxial resonator is formed. A coaxial resonator is configured in which a space surrounded by the inner surface of the thin conductor layer, the inner surface of the plate-shaped conductor, and the outer peripheral surface of the rod-shaped conductor is an internal space for resonating microwaves, and the rod-shaped conductor is a central conductor. The Rukoto. In this case, almost the entire internal space of the coaxial resonator is filled with the light emitting cells. For this reason, when microwaves are supplied from the microwave input unit to the internal space of the coaxial resonator and the microwaves are resonated in the internal space, almost the entire microwaves in the internal space are converted into the light emitting cells. It can function as an energy source for excitation and emission of luminescent materials.

  Further, the coaxial resonator having the light emitting cell in the internal space has the rod-like conductor inserted coaxially into the through-hole of the light-emitting cell, and at the tip of the rod-like conductor protruding from the through-hole by the penetration. Since it is configured only by mounting, it is possible to easily assemble a coaxial resonator and assemble a light emitting cell to the resonator without requiring a complicated assembly structure. .

  Therefore, according to the light source device of the second aspect of the present invention, the utilization efficiency of the energy of the microwaves to be resonated can be increased as much as possible while the assembly structure of the light emitting cells is simplified, and as a result, the light source The amount of light generated by the apparatus can be increased as much as possible.

  In the second aspect of the invention, the rod-shaped conductor has a male screw portion on the outer peripheral portion of the tip portion protruding toward the one end surface side of the light emitting cell, and the conductive pressing member is formed on the male screw portion of the rod-shaped conductor. It is suitable that it is an annular member which has the internal thread part to screw together in an inner peripheral part.

  According to this, in the state where the rod-shaped conductor is inserted into the through hole of the light emitting cell, the coaxial member can be assembled and the light emitting cell to the resonator simply by screwing the conductive member into the male screw portion of the rod-shaped conductor. Can be assembled very easily.

  In the first and second aspects of the present invention described above, the thin conductor layer may be formed of a transparent conductive film that covers the entire surface of the light emitting cell to which the thin conductor layer is to be fixed. It is preferably made of a transparent conductive film formed in a mesh shape.

  Thus, by forming the thin conductor layer in a mesh shape using a transparent conductive film as the material, the light radiated to the outside of the light emitting cell through the opening portion is not attenuated in the thin conductor layer. The amount of light emitted from the light emitting cell to the outside can be further increased.

  1st Embodiment of the light source device of this invention is described with reference to FIGS. FIG. 1 is a diagram showing an overall configuration of a light source device 1 of the present embodiment, FIG. 2 is a longitudinal sectional view of a main part (light source structure 3) of the light source device 1, and FIG. It is a perspective view of a member.

  Referring to FIG. 1, a light source device 1 of the present embodiment includes a light source structure 3 that is a light generation source structure, and of the light emitted from the light source structure 3. And a reflecting mirror 5 that reflects light emitted to the side and directs the light toward the front.

  The configuration of the light source structure 3 will be described in detail with reference to FIGS. The light source structure 3 includes a plate-shaped conductor 7, a rod-shaped conductor 9, and a light emitting cell 11 as main components.

  In this embodiment, the plate-like conductor 7 is made of metal and is formed in a disc shape. A male thread portion 13 is formed on the outer peripheral surface of the plate-like conductor 7. Further, a through hole 15 is formed in the axial center portion of the plate-like conductor 7.

  The front and back surfaces of the plate-like conductor 7 are planes orthogonal to the axis of the plate-like conductor 7, and one of the surfaces 7a (the left side surface in FIG. 2; hereinafter referred to as the inner surface 7a of the plate-like conductor 7). The rod-shaped conductor 9 extends in the normal direction (axial direction) of the plate-shaped conductor 7. The rod-shaped conductor 9 is made of metal and is formed in a shape (cylindrical shape) in which a transverse section (a section perpendicular to the axis of the rod-shaped conductor 9) is a circle with a constant diameter.

  The rod-like conductor 9 extends coaxially with the plate-like conductor 7, and the end on the plate-like conductor 7 side is inserted into the through hole 13 of the plate-like conductor 7. An insulator 17 made of a material that can transmit microwaves such as Teflon (registered trademark) is interposed around the rod-shaped conductor 9 in the through-hole 15, and the rod-shaped conductor 9 is formed into a plate shape by the insulator 17. Insulated from the conductor 7.

  A coaxial connector 19 as a microwave input portion is attached to the other surface 7b of the plate-like conductor 7 (the right-side surface in FIG. 2; hereinafter referred to as the outer surface 7b of the plate-like conductor 7). The coaxial connector 19 has a center conductor 19a inserted into a hole 21 formed in the axial center of the end of the rod-shaped conductor 9, and is connected to the rod-shaped conductor 9 by soldering or the like in the hole 21. Has been. The outer peripheral portion of the coaxial connector 19 is electrically connected to the plate conductor 7. The coaxial connector 19 connects a microwave oscillator (not shown) via a coaxial cable, and a microwave having a predetermined frequency is supplied from the microwave oscillator in the connected state.

  The light emitting cell 11 is generally formed in a cylindrical container shape whose both ends are closed, and a light emitting substance (not shown) such as sulfur, mercury, argon gas (Ar), xenon gas (Xe) is contained therein. Enclosed alone or in a mixed state. The type of the luminescent material is selected according to the wavelength (or frequency) of desired light to be generated by the light source structure 3.

  The light emitting cell 11 is made of a material that can sufficiently transmit light generated when the light emitting material inside is excited and the microwave used for the excitation, and the material is, for example, quartz glass.

  One end surface 11a (right end surface in FIG. 2; hereinafter referred to as first end surface 11a) of the light emitting cell 11 is a plane whose portion excluding the center is orthogonal to the axis of the light emitting cell 11, but the other end surface 11a. The left end face in FIG. 2 (hereinafter referred to as the second end face 11b) is a plane that is orthogonal to the axial center of the light emitting cell 11 as a whole. And in the center part of this 1st end surface 11a, the dent hole 23 which dents the part is provided. The recessed hole 23 extends from the first end surface 11a side of the light emitting cell 11 toward the second end surface 11b side to the axial center portion of the light emitting cell 11, and the depth thereof is the length L1 of the rod-shaped conductor 9 (in detail). Is set to the same depth as the length L1) from the position of the inner surface 7a of the plate-like conductor 7 to the tip of the rod-like conductor 9, or slightly larger than that. Further, the recessed hole 23 has a constant diameter, and the diameter is set to be the same as or slightly larger than the diameter of the rod-shaped conductor 9. Therefore, the recessed hole 23 is formed so that a portion from the tip of the rod-like conductor 9 to the base end of the position of the inner surface 7a of the plate-like conductor 7 can be inserted.

  The total length in the axial direction of the light emitting cell 11 is set to be longer than the depth of the recessed hole 23 (length L1 of the rod-shaped conductor 9), and the second end surface 11b of the light emitting cell 11 is There is a space between the bottom. For this reason, the space in which the light emitting substance of the light emitting cell 11 is enclosed is composed of a space around the outer peripheral surface of the recessed hole 23 and a space between the bottom surface of the recessed hole 23 and the second end surface 11 b of the light emitting cell 11. Further, the outer diameter of the light emitting cell 11 is substantially the same as the diameter of the plate-like conductor 7.

  A thin conductor layer 25 is fixed to the outer peripheral surface of the light emitting cell 11 and the second end surface 11b so as to cover the entire surface thereof. Each portion of the thin conductor layer 25 is electrically connected to each other, and in this embodiment, the thin conductor layer 25 is formed of a transparent conductive film (so-called ITO film). The transparent conductive film transmits light generated by the light emitting substance inside the light emitting cell 11, and is made of, for example, a substance obtained by doping indium oxide with tin.

  In addition, you may adhere | attach a thin conductor layer not only on the outer peripheral surface of the light emitting cell 11 and the 2nd end surface 11b, but also on the plane part of the 1st end surface 11a. However, in this case, when the rod-shaped conductor 9 is inserted into the recess hole 23, the periphery of the recess hole 23 is arranged so that the rod-shaped conductor 9 and the thin conductor layer do not conduct around the open end of the recess hole 23. The thin conductor layer should not be fixed to. In this case, the thin conductor layer may be fixed only to the portion near the outer periphery of the first end face 11 a of the light emitting cell 11.

  As shown in FIGS. 2 and 3, an annular (cylindrical) attachment member 27 is fixed to the outer peripheral portion of the end portion on the first end face 11 a side of the light emitting cell 11. One end portion (left end portion in FIG. 2) of the attachment member 27 is fitted to the end portion on the first end face 11a side of the light emitting cell 11, and the other end portion (right end portion in FIG. 2) is fitted. ) Protrudes to the front side of the first end face 11 a of the light emitting cell 11. In the present embodiment, the attachment member 27 is a conductive member made of a conductor such as metal, and is electrically connected to the thin conductor layer 25 at the outer peripheral portion of the end portion of the light emitting cell 11 on the first end face 11a side. A female screw portion 29 that is screwed into the male screw portion 13 on the outer peripheral surface of the plate-like conductor 7 is formed on the inner peripheral surface of the attachment member 27 excluding the portion where the light emitting cell 11 is fitted.

  As shown in FIG. 2, the light emitting cell 11 to which the thin conductor layer 25 and the mounting member 27 are fixed is inserted into the concave hole 23 and the light emitting cell 11 is arranged around its axis as shown in FIG. By rotating and screwing the female threaded portion 29 of the mounting member 27 into the male threaded portion 13 of the plate-like conductor 7 and connecting the mounting member 27 to the plate-like conductor 7, the plate-like conductor is coaxial with the rod-like conductor 9. 7 is assembled. In this assembled state, the thin conductor layer 25 is electrically connected to the plate conductor 7 via the attachment member 27. Further, the flat portion of the first end surface 11 a of the light emitting cell 11 is brought into contact with the inner surface 7 a of the plate-like conductor 7. Thereby, the light source structure 3 is comprised.

  In this state where the light emitting cell 11 is assembled to the plate-like conductor 7, a space surrounded by the inner surface 7 a of the plate-like conductor 7, the inner surface of the thin conductor layer 25, the outer peripheral surface of the rod-like conductor 9, and the tip surface is microscopic. A semi-coaxial resonator 31 having a space for resonating a wave (a microwave supplied from the microwave oscillator to the coaxial connector 19) and having the rod-shaped conductor 9 as a central conductor is formed. In this case, the tubular outer conductor of the semi-coaxial resonator 31 is constituted by the thin conductor layer 25 that covers the outer peripheral surface of the light emitting cell 11, and the short-circuited surfaces at both ends of the outer conductor are the second light emitting cells 11. The thin conductor layer 25 covering the end face 11b and the inner face 7a of the plate-like conductor 7 are constituted.

  Supplementally, since the rod-shaped conductor 9 resonates the microwave in the internal space of the semi-coaxial resonator 31, the length L1 is ¼ of the wavelength λ of the microwave supplied from the microwave oscillator. Is set. More generally, the length L of the rod-shaped conductor 9 may be a length that is an odd multiple of λ / 4.

  When a thin conductor layer is also fixed to the first end face 11a of the light emitting cell 11, the entire thin conductor layer 25 is brought into contact with the thin conductor layer 25 and the plate conductor 7 on the first end face 11a. 7 may be conducted. In that case, the attachment member 27 may be made of an insulator such as resin.

  Returning to the description of FIG. 1, the reflecting mirror 5 is a concave mirror formed in a mortar shape, and the light source structure 3 is inserted almost coaxially into a hole 5 a formed in the bottom of the reflecting mirror 5. The inner periphery is fixed to the outer periphery of the mounting member 27. In this case, the light emitting cell 11 of the light source structure 3 is located on the inner side of the reflecting mirror 5, and the coaxial connector 19 protrudes to the outer side of the reflecting mirror 5. And the glass 33 which permeate | transmits the light radiated | emitted from the light emitting cell 11 is mounted | worn with the opening end of the reflective mirror 5. FIG.

  The reflecting mirror 5 and the light source structure 3 may be separately attached to a casing (not shown) around the reflecting mirror 5. Moreover, the imaginary line which attached | subjected the reference code | symbol 77 in FIG. 1 is related with the deformation | transformation aspect of embodiment of this invention, This is mentioned later.

  In the light source device 1 of the present embodiment described above, the microwave is supplied from the microwave oscillator (not shown) to the coaxial connector 19 via the coaxial cable with the light emitting cell 11 assembled to the plate-like conductor 7 as described above. Then, the microwave is introduced from the coaxial connector 19 into the internal space of the semi-coaxial resonator 31 and resonates in the internal space. Then, the light emitting material in the light emitting cell 11 is excited by the energy of the resonating microwave to emit light. In this case, in the light source structure 3 of the present embodiment, almost the entire internal space of the semi-coaxial resonator 31 is filled with the light emitting cells 11 by the structure described above. For this reason, the luminescent material is excited and emitted at various locations in the internal space of the semi-coaxial resonator 31. In the semi-coaxial resonator 31, the energy of the microwave near the tip of the rod-shaped conductor 9 is relatively high, so that the luminescent substance is actively excited and emitted near the tip. Even in the vicinity of 9, a part of the luminescent material existing in the light emitting cell 11 around the periphery can be excited and emitted by microwave energy.

  The light generated in the light emitting cell 11 is radiated in all directions through the thin conductor layer 25. At this time, light (light indicated by an arrow A in FIG. 1) radiated forward of the light emitting cell 11 (front direction of the second end surface 11b of the light emitting cell 11) passes through the glass 33 at the opening end of the reflecting mirror 5 as it is. Radiated to the outside. Moreover, the light (light shown by the arrow B in FIG. 1) radiated to the side (radial direction) of the light emitting cell 11 is reflected by the reflecting mirror 5 and its direction is changed to the front of the light emitting cell 11. Radiated to the outside through the glass 33. Thereby, most of the light emitted from the light emitting cell 11 can be directed to the front of the light emitting cell 11, and the amount of light to the front of the light emitting cell 11 can be increased.

  According to the light source device 1 of this embodiment, the light emitting substance in the light emitting cell 11 is effectively utilized by utilizing substantially the entire energy of the microwave resonating in the internal space of the semi-coaxial resonator 31 of the light source structure 3. The light source device 1 can be excited and light-emitted, and consequently the energy efficiency of the light source device 1 can be increased. Furthermore, the total light amount generated by the light source structure 31 of the light source device 1 can be increased as much as possible.

  In the present embodiment, the thin conductor layer 25 is in the form of a film that covers the entire surface of the light emitting cell 11 to which the thin conductor layer 25 is fixed. For example, as shown in FIG. The conductive film may be fixed to the light emitting cell 11 as a thin conductor layer 25 ′. In this case, the opening size of the mesh-like thin conductor layer 25 ′ is sufficiently smaller than ¼ of the wavelength of the microwave resonated in the internal space of the semi-coaxial resonator 31, and the light emitting cell 11. It is set to be sufficiently larger than the wavelength of the light generated by the luminescent material. This prevents microwaves from passing through the thin conductor layer 25 ′, and allows light generated by the luminescent material in the light emitting cell 11 to sufficiently pass through the openings of the thin conductor layer 25 ′.

  In this way, when the thin conductor layer 25 ′ is configured in a mesh shape made of a transparent conductive film, the light emitted from the inside of the light emitting cell 11 through the opening portion of the thin conductor layer 25 ′ is Since no attenuation occurs in the material portion of the thin conductor layer 25 ′, the amount of light emitted to the outside of the light emitting cell 11 can be further increased.

  In the first embodiment, the attachment member 27 is configured to be screwed into the male screw portion 13 formed on the outer peripheral portion of the plate-like conductor 7. For example, a flange is formed on the outer peripheral surface of the plate-like conductor 7. Further, the attachment member may be fastened to this via a plurality of screws.

  Next, a second embodiment of the light source device of the present invention will be described with reference to FIGS. FIG. 5 is a longitudinal sectional view of the light source structure 51 of the light source device 50 of the present embodiment, and FIG. 6 is a perspective view of the light emitting cell 57 of the light source structure 51. The present embodiment is different from the first embodiment only in the configuration of the light source structure 51, and therefore, the configuration of the light source structure 51 will be mainly described.

  With reference to FIG. 5 and FIG. 6, the light source structure 51 of the present embodiment includes a plate-shaped conductor 53, a rod-shaped conductor 55, and a light emitting cell 57. The plate-like conductor 53 is made of metal and is formed in a disk shape, like the plate-like conductor 7 of the first embodiment. A through hole 59 is formed in the axial center portion of the plate-like conductor 53. Also, the inner surface 53a (the left surface in FIG. 5) which is one of the front and back surfaces of the plate-like conductor 53 and the outer surface 53b (the right surface in FIG. 5) which is the other surface are plate-shaped. This is a plane orthogonal to the axis of the conductor 53. In the present embodiment, no screw portion is formed on the outer peripheral portion of the plate-like conductor 53.

  The rod-shaped conductor 55 extends from the inner surface 53 a of the plate-shaped conductor 53 in the normal direction (axial direction) of the plate-shaped conductor 53. This rod-shaped conductor 55 is made of metal and has a shape in which the cross-sectional shape is a circle with a constant diameter, like the rod-shaped conductor 9 of the first embodiment. However, in this embodiment, a male screw portion 61a is formed on the outer peripheral surface of the tip portion of the rod-shaped conductor 55, and a metal nut 61b as an annular conductive pressing member is detachably attached to the male screw portion 61a. Can be screwed onto. The rod-shaped conductor 55 extends coaxially with the plate-shaped conductor 53, and the end of the rod-shaped conductor 55 on the plate-shaped conductor 53 side penetrates the plate-shaped conductor 53 as in the first embodiment. It is inserted into the hole 59 and is insulated from the plate-like conductor 53 by an insulator 63 interposed around the rod-like conductor 55 in the through-hole 50. The material of the insulator 63 is the same as that of the insulator 17 of the first embodiment.

  A coaxial connector 65 as a microwave introduction portion is attached to the outer surface 53b of the plate-like conductor 53, and the central conductor 65a of the coaxial connector 65 is connected to the end of the rod-like conductor 55 as in the first embodiment. It is inserted into a hole 67 drilled in the axial center portion, and is connected and connected to the rod-shaped conductor 55 in the hole 67 by soldering or the like. The coaxial connector 65 is a microwave input portion to which a microwave of a predetermined frequency is supplied via a coaxial cable from a microwave oscillator (not shown) as in the coaxial connector 19 of the first embodiment, and its outer peripheral portion is a plate. The conductor 53 is electrically connected.

  The light emitting cell 57 is generally formed in a cylindrical container shape closed at both ends, and a light emitting substance (not shown) such as sulfur, mercury, argon gas (Ar), xenon gas (Xe) or the like is used alone or in combination. It is enclosed in a state. The material of the light emitting cell 57 is the same as that of the light emitting cell 11 of the first embodiment (in this embodiment, quartz glass).

  As shown in FIGS. 5 and 6, in this embodiment, the axial center portion of the light emitting cell 57 has a central portion of one end surface 57 a (right end surface in FIG. 5, hereinafter referred to as a first end surface 57 a). A through hole 69 penetrating to the other end face 57b (left end face in FIG. 5; hereinafter referred to as second end face 57b) is provided. Therefore, the space for encapsulating the luminescent material in the light emitting cell 57 is the space around the through hole 69. The through hole 69 has a constant diameter, and the diameter is set to be the same as or slightly larger than the diameter of the rod-shaped conductor 55. The length L2 of the through-hole 69 (= the length in the axial direction of the light emitting cell 57) is the length of the rod-shaped conductor 55 (specifically, from the position of the inner surface 53a of the plate-shaped conductor 53, the tip of the rod-shaped conductor 55). Is set to be shorter than For this reason, the through hole 69 is formed so that the rod-shaped conductor 55 can be inserted, and when the rod-shaped conductor 55 is inserted to its base end (position of the inner surface 53a of the plate-shaped conductor 53), the rod-shaped conductor 55 is inserted. A male thread portion 61 a at the tip of the light emitting cell 57 protrudes from the through hole 69 on the second end surface 57 b side of the light emitting cell 57.

  Note that the first end surface 57 a and the second end surface 57 b of the light emitting cell 57 are both planes perpendicular to the axis of the light emitting cell 57 except for the location of the through hole 69. Further, the outer diameter of the light emitting cell 57 is substantially the same as the diameter of the plate conductor 53.

  A thin conductor layer 71 is fixed to the first end surface 57a and the second end surface 57b of the light emitting cell 57 and the outer peripheral surface so as to cover them. The thin conductor layer 71 is formed of a transparent conductive film (ITO film), as in the first embodiment, and the respective parts are electrically connected to each other. In this case, in this embodiment, the thin conductor layer 71 covers the entire outer peripheral surface of the light emitting cell 57. On the other hand, in the first end surface 57a and the second end surface 57b of the light emitting cell 57, the thin conductor layer 71 is formed of the annular portions 73a and 73b (the end surfaces 57a and 57b around the through hole 69) of the end surfaces 57a and 57b. 57b, and covers the entire portion excluding the outer peripheral circle of the through hole 69 in 57b and the broken circles Ca and Cb in FIG. 6 and is electrically connected to the thin conductor layer 71 on the outer peripheral surface of the light emitting cell 57. In this way, it is fixed to each end face 57a, 57b. As a result, the thin conductor layer 71 prevents the rod-shaped conductor 55 from contacting / conducting the thin conductor layer 71 at the positions of the end faces 57a and 57b when the rod-shaped conductor 55 is inserted into the through hole 69 of the light emitting cell 57. It has become.

  However, on the second end surface 57b of the light emitting cell 57, the thin conductor layer 71 may be fixed to the second end surface 57b so as to cover the second end surface 57b including the annular portion 73b. In this case, the rod-shaped conductor 55 may be brought into contact / conduction with the thin conductor layer 71 at the position of the second end face 57b with the rod-shaped conductor 55 inserted into the through hole 69. The outer diameter of the annular portion 73a on the first end surface 57a of the light emitting cell 57 may be, for example, substantially the same as or slightly larger than the diameter of the through hole 59 of the plate-like member 53. The thin conductor layer 71 may be fixed only to a portion near the outer periphery of the first end face 57a.

  As shown in FIG. 5, the light emitting cell 57 to which the thin conductor layer 71 is fixed as described above has a rod-shaped conductor 55 inserted and penetrated coaxially through the through-hole 69, and the first end face 57 a of the light emitting cell 57. Of the rod-shaped conductor 55 protruding from the through hole 69 on the second end face 57b side of the light emitting cell 57 in this state. The nut 61 b is screwed into the male screw portion 61 a at the tip, and the nut 61 b is pressed against the second end surface 57 b of the light emitting cell 57, so that the nut 61 b and the plate conductor 55 are sandwiched. Thereby, the light source structure 51 of this embodiment is assembled.

  In this case, the diameter of the surface of the nut 61b on the second end surface 57b side is set larger than the outer diameter of the annular portion 73b of the second end surface 57b. Therefore, when the light emitting cell 57 is sandwiched between the nut 61 b and the plate-like conductor 55 as described above, the nut 61 b is in contact with and conductive with the thin conductor layer 71 at the second end surface 57 b of the light emitting cell 57. In the second end face 57b, the rod-shaped conductor 55 is electrically connected to the thin conductor layer 71 through the nut 61b.

  In the light source structure 51 configured as described above, a space surrounded by the inner surface 53a of the plate-shaped conductor 53, the inner surface of the thin conductor layer 71, and the outer peripheral surface of the rod-shaped conductor 55 is microwave (not shown). A coaxial resonator 75 having a space for resonating the microwave supplied from the oscillator to the coaxial connector 65 and having the rod-shaped conductor 55 as a central conductor is configured. In this case, the tubular outer conductor of the coaxial resonator 75 is constituted by a thin conductor layer 71 covering the outer peripheral surface of the light emitting cell 57, and the second of the light emitting cell 57 among the short-circuited surfaces at both ends of the outer conductor. The short-circuit surface on the end surface 57b side is composed of a thin conductor layer 71 fixed to the second end surface 57b and a surface on the second end surface 57b side of the nut 61b that conducts thereto. Further, the short-circuit surface of the coaxial resonator 75 on the first end surface 57a side of the light emitting cell 57 is composed of a thin conductor layer 71 fixed to the first end surface 57a and an inner surface 53a of the plate state conductor 53 that is electrically connected thereto. Will be.

  Supplementally, the length L2 (= the axial length L2 of the light emitting cell 57) of the rod-shaped conductor 9 in the internal space of the coaxial resonator 75 is to resonate the microwave supplied from the microwave oscillator. It is set to 1/2 of the wavelength λ of the microwave. More generally, the length L2 may be a length that is an integral multiple of λ / 2.

  The above is the configuration of the light source structure 51 of the light source device 50 in the present embodiment. In the present embodiment, the reflecting mirror 5 and the glass 33 attached to the opening end thereof are the same as those in the first embodiment. In this case, the reflecting mirror 5 has the inner peripheral portion of the hole 5 a at the bottom thereof fixed to the outer peripheral portion of the plate-like conductor 53. However, the reflecting mirror 5 and the light source structure 51 may be separately attached to a housing around the reflecting mirror 5.

  In the light source device 50 of the present embodiment described above, when microwaves are supplied from a not-shown microwave oscillator to the coaxial connector 65 via a coaxial cable, the microwaves enter the internal space of the coaxial resonator 75 from the coaxial connector 65. It is introduced and resonates in the internal space. Then, the light emitting material in the light emitting cell 57 is excited by the energy of the resonating microwave to emit light. In this case, in the light source structure 51 of the present embodiment, almost the entire internal space of the coaxial resonator 75 is filled with the light emitting cells 57 by the above-described structure. Therefore, as in the first embodiment, the luminescent material is excited and emitted at various locations in the internal space of the coaxial resonator 75. In the coaxial resonator 75, the energy of the microwave near the center in the axial direction becomes relatively high, so that the luminescent substance is actively excited and emitted near the center. A part of the light-emitting substance existing in the light-emitting cell 57 can be excited and light-emitted by microwave energy at other locations.

  The light generated in the light emitting cell 57 is radiated in all directions through the thin conductor layer 71. Furthermore, the light is directed to the front of the light emitting cell 57 (front direction of the second end surface 57b of the light emitting cell 57) via the reflecting mirror 5 or directly, as in the first embodiment. The light is emitted to the outside through the glass 33 at the open end of the reflecting mirror 5.

  According to the light source device 50 of the present embodiment, the light emitting material in the light emitting cell 57 is excited by effectively utilizing the entire energy of the microwave resonating in the internal space of the coaxial resonator 75 of the light source structure 51. -It can be made to light-emit, and the energy efficiency of the light source device 50 can be made high efficiency by extension. Furthermore, the total light amount generated by the light source structure 51 of the light source device 50 can be increased as much as possible.

  In the present embodiment, the thin conductor layer 71 is a film that covers the entire surface of the light emitting cell 57 to which the thin conductor layer 71 is fixed. For example, as shown in FIG. The conductive film may be fixed to the light emitting cell 57 as a thin conductor layer 71 ′. In this case, the mesh size of the mesh-like thin conductor layer 71 ′ may be set in the same manner as in FIG.

  When the thin conductor layer 71 ′ is configured in a mesh shape made of a transparent conductive film as described above, the amount of light emitted to the outside of the light emitting cell 57 is further increased as in the case of FIG. Can be increased.

  In the first and second embodiments, for example, when mercury is used as the luminescent material, the light emitted from the light emitting cells 11 and 57 is ultraviolet light. In this case, for example, as shown by an imaginary line in FIG. 1, a phosphor 77 that emits fluorescence in the visible light region by ultraviolet rays is fixed to the entire inner surface of the glass 33 at the opening end of the reflecting mirror 5. Visible light may be emitted from the phosphor 77. In addition, you may make it a fluorescent substance adhere to the outer surface side of the thin film conductor layers 25 and 71. FIG.

  In the first and second embodiments, the transparent conductive film is used as the thin conductor layer. However, the thin conductor layer is made of, for example, a metal mesh, and is made of an adhesive (a sufficient amount of light generated by the luminescent material). The light emitting cells 11 and 57 may be fixed to the light emitting cells 11 and 57 with a penetrable adhesive.

The figure which shows the whole light source device structure of 1st Embodiment of this invention. The longitudinal cross-sectional view of the light source structure which is a principal part in the light source device of FIG. The perspective view which shows the light emitting cell and attachment member with which the light source structure of FIG. 2 was equipped. The perspective view which shows the other example of the thin conductor layer in 1st Embodiment. The longitudinal cross-sectional view of the light source structure which is the principal part of the light source device of 2nd Embodiment of this invention. The perspective view which shows the light emitting cell with which the light source structure of FIG. 5 was equipped. The perspective view which shows the other example of the thin conductor layer in 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,50 ... Light source device, 7, 53 ... Plate-shaped conductor, 9,55 ... Bar-shaped conductor, 11, 57 ... Light emitting cell, 13 ... Male screw part of plate-shaped conductor, 19, 65 ... Coaxial connector (microwave input part) , 23 ... recessed hole, 25, 71 ... thin conductor layer, 27 ... attachment member, 29 ... female screw part of attachment member, 31 ... semi-coaxial resonator, 61a ... male screw part of rod-shaped conductor, 61b ... nut (conductive holding member) ), 69... Through-hole, 75... Coaxial resonator.

Claims (5)

In a light source device that resonates in an internal space of a resonator in which a light emitting cell enclosing a light emitting material is housed, and excites the light emitting material in the light emitting cell by the energy of the resonating microwaves to emit light,
A plate-like conductor and one of the front and back surfaces of the plate-like conductor is an inner surface, and the other surface is an outer surface, and is insulated from the plate-like conductor from the inner surface of the plate-like conductor and normal to the plate-like conductor A rod-shaped conductor extending in the direction, and a microwave input portion provided on the outer surface side of the plate-shaped conductor to input microwaves from the outer surface side of the plate-shaped conductor to the inner surface side,
The light emitting cell is formed in a cylindrical container shape whose both ends are closed, and the rod-shaped conductor is inserted in the center of one end face from the tip to the base end on the plate-shaped conductor side coaxially with the light emitting cell. A recess hole formed by recessing the center of the one end face is provided,
A thin conductor layer capable of transmitting light generated by the luminescent material is provided on at least the outer peripheral surface and the other end surface of the outer peripheral surface and the other end surface of the light emitting cell and the surface of the one end surface excluding the peripheral portion of the recessed hole. Fixed to cover the surface,
An attachment member that can be detachably connected to the plate conductor is fixed to the outer peripheral portion of the end portion on the one end surface side of the light emitting cell,
The light emitting cell is configured such that the rod-shaped conductor is coaxially inserted into the recessed hole, and the attachment member is connected to the plate-shaped conductor, whereby the thin conductor layer is electrically connected to the plate-shaped conductor. Is detachably attached to the
A space surrounded by the inner surface of the thin conductor layer, the inner surface of the plate-shaped conductor, and the outer peripheral surface and the tip surface of the rod-shaped conductor in the attached state is an internal space for resonating microwaves, and the rod-shaped conductor is a central conductor. A light source device characterized in that a microwave resonated in an internal space of a configured semi-coaxial resonator is supplied to the internal space from the microwave input unit.   The plate-like conductor is formed in a disc shape and has a male screw portion on an outer peripheral portion thereof, and the attachment member has an annular shape having an inner screw portion on the inner peripheral portion thereof which is screwed with the male screw portion of the plate-like conductor. 2. The light source device according to claim 1, wherein the light source device is a member, and the attachment member is connected to the plate-like conductor by screwing the female screw portion with the male screw portion of the plate-like conductor. In a light source device that resonates in an internal space of a resonator in which a light emitting cell enclosing a light emitting material is housed, and excites the light emitting material in the light emitting cell by the energy of the resonating microwaves to emit light,
A plate-like conductor and one of the front and back surfaces of the plate-like conductor is an inner surface, and the other surface is an outer surface, and is insulated from the plate-like conductor from the inner surface of the plate-like conductor and normal to the plate-like conductor A rod-like conductor extending in the direction, a microwave input portion provided on the outer surface side of the plate-like conductor to input microwaves from the outer surface side to the inner surface side of the plate-like conductor, and a tip portion of the rod-like conductor And an annular conductive pressing member that can be detachably mounted in conduction with the rod-shaped conductor,
The light emitting cell is formed in a cylindrical container shape closed at both ends, and the rod-shaped conductor is penetrated through the shaft center so that the tip of the light emitting cell protrudes toward one end surface of the light emitting cell. Holes are provided,
A thin conductor layer capable of transmitting light generated by the luminescent material is fixed to the outer peripheral surface of the light emitting cell and the surface of the other end surface excluding the peripheral portion of the through hole so as to cover the surface,
In the light emitting cell, the conductive pressing member is inserted into the through hole coaxially with the thin conductor layer on the other end surface in contact with and conductive with the inner surface of the plate conductor. By attaching the conductive pressing member to the tip end portion of the rod-shaped conductor protruding toward the one end surface side of the light emitting cell so as to be in contact with and conductive with the thin conductor layer on the one end surface of the light emitting cell, the conductive pressing member And the plate-like conductor,
A space surrounded by the inner surface of the thin conductor layer, the inner surface of the plate-shaped conductor, and the outer peripheral surface of the rod-shaped conductor in the sandwiched state is an internal space for resonating microwaves, and the rod-shaped conductor is configured as a central conductor. A light source device characterized in that a microwave resonated in an internal space of a coaxial resonator is supplied to the internal space from the microwave input unit.   The rod-shaped conductor has a male screw portion on an outer peripheral portion of a tip portion projecting to one end surface side of the light emitting cell, and the conductive pressing member has an inner screw portion that is screwed into the male screw portion of the rod-shaped conductor. The light source device according to claim 3, wherein the light source device is an annular member.   The light source device according to claim 1, wherein the thin conductor layer is made of a transparent conductive film formed in a mesh shape.

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