JP2005149884A - Light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device effectively exerting original performance without bringing about a shorter life or delay in re-lighting time. <P>SOLUTION: The light source device 10 is structured of: an extra-high pressure discharge lamp 12 having a luminous part 22 in which, not less than 0.15 mg/mm<SP>3</SP>of mercury is sealed, and two sealing parts 24 extending in a rod shape from either end of the luminous part 22; a reflector 14 having a fitting hole 36 through which one of the sealing parts 24 is inserted for firm fixing and a reflecting face 14a reflecting light irradiated from the luminous part 22; and a heat conduction member 16 formed in extension toward the luminous part 22 over the center part of the sealing parts 24 so as to cover the side of the sealing parts inserted through the fitting hole 36. Therefore, heat of the extra-high pressure discharge lamp 12 is efficiently released from the sealing parts to an outside space through the heat conduction member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a light source device that includes an ultrahigh pressure discharge lamp and a reflector and is used as a light source of a projection type projector.

  In recent years, projection projectors have been used in various scenes, such as business presentations, home theaters and rear projection televisions in the home, and the light source device that is the main component is commonly used with a discharge lamp attached to a reflector. It has been.

There is a strong demand for “brightness improvement” in such a light source device for a projection type projector. Conventionally, this demand has been met by increasing the pressure of the discharge lamp (enclosing mercury of 0.15 mg / mm ³ or more). . In addition, when the pressure of the discharge lamp is increased, the discharge lamp is likely to burst during use. By attaching a cover to the front part of the reflector, the discharge lamp fragments and mercury contained in the discharge lamp are prevented from scattering. (Patent Document 1). In such a light source device 1 with a reflector, as shown in FIG. 13, a ceramic cap 3 is attached to the end of the discharge lamp 2, and the discharge lamp 2 and the ceramic cap 3 are joined to the reflector 5 with cement 4. Was.
JP 2002-75039 A

  In the prior art, since the cover was attached to the front part of the reflector, there was a problem that the temperature of the discharge lamp became too high and the original performance could not be exhibited. Further, if the temperature of the discharge lamp becomes too high, the glass is devitrified and deformed in a short time, and the electrode deformation is accelerated by the impurity gas generated due to the glass abnormality, so the life of the discharge lamp is shortened. There was a problem. Furthermore, since air does not circulate inside the reflector sealed with the cover, there is a problem that the temperature decrease after the light is turned off is slow, and the waiting time until the light can be turned on again becomes long.

  Therefore, a main object of the present invention is to provide a light source device capable of effectively exhibiting the original performance without causing a shortened lifetime or a delay in relighting time.

The invention described in claim 1 has “a light emitting portion 22 in which mercury of 0.15 mg / mm ³ or more is sealed and two sealing portions 24 formed in a rod shape from both ends of the light emitting portion 22. The reflector 14 having the mounting hole 36 into which one of the ultra-high pressure discharge lamp 12 and the sealing portion 24 is inserted and the reflecting surface 14a for reflecting the light emitted from the light emitting portion 22, the seal on the side inserted into the mounting hole 36 The light source device includes the heat conducting member 16 formed so as to cover the stopper portion 24 and extend to the light emitting portion 22 side beyond the central portion of the sealing portion 24.

  In the present invention, since the heat conducting member 16 is formed extending from the tip of the sealing portion 24 to the light emitting portion 22 side beyond the central portion, the heat of the ultra high pressure discharge lamp 12 is transferred from the sealing portion 24 to the heat conducting member 16. It is efficiently escaped to the outside space through.

  The invention described in claim 2 is characterized in that, in the “light source device” described in claim 1, “a cover 48 is attached to the front portion of the reflector 14”.

  In the present invention, the cover 48 can prevent the fragments of the ultrahigh pressure discharge lamp 12 and the mercury sealed in the ultrahigh pressure discharge lamp 12 from scattering.

  According to the third aspect of the present invention, in the “light source device” according to the first or second aspect, “the heat conducting member 16 is interposed between the inner surface of the mounting hole 36 and the outer surface of the sealing portion 24”. Features.

  In the present invention, the heat of the ultra-high pressure discharge lamp 12 is released from the sealing portion 24 through the heat conducting member 16 to the external space, and is also released from the sealing portion 24 through the heat conducting member 16 to the reflector 14.

  The invention described in claim 4 is characterized in that, in the “light source device” described in any one of claims 1 to 3, “the heat radiating plate 70 is attached to the heat conducting member”.

  In the present invention, the heat of the ultrahigh pressure discharge lamp 12 is released from the sealing portion 24 to the external space through the heat conducting member and the heat radiating plate 70.

  According to the invention described in claims 1 to 4, since the heat of the ultra high pressure discharge lamp can be released from the sealing portion to the external space through the heat conducting member, it is possible to prevent the temperature of the ultra high pressure discharge lamp from becoming too high. . Therefore, the original performance can be effectively exhibited without causing a shortening of the life of the ultra high pressure discharge lamp and a delay of the relighting time.

  1 and 2, a light source device 10 to which the present invention is applied is used as a light source of a projection type projector, and reflects light from an ultrahigh pressure discharge lamp 12 and the ultrahigh pressure discharge lamp 12. The reflector 14, the heat conducting member 16 that releases heat from the ultra-high pressure discharge lamp 12, a cap 18, and a lamp house 20 are included.

The ultra-high pressure discharge lamp 12 includes a sealed container 26 having a spherical light emitting portion 22 and a rod-shaped sealing portion 24 extending straight from both ends thereof. And in each sealing part 24 in the envelope container 26, one end protrudes into the inside of the light emitting part 22, an electrode bar 28 with one end protruding outside, and the other end of the electrode bar 28. A molybdenum foil 32 that electrically connects the other end of the lead bar 30 is disposed, and a pair of tungsten electrodes (hereinafter simply referred to as “electrodes”) 34 is formed at one end of each electrode bar 28. An anode 34a and a cathode 34b are connected. In addition, 0.15 mg / mm ³ or more of mercury is sealed inside the light emitting unit 22.

  The ultra-high pressure discharge lamp 12 shown in FIG. 1 is a double-ended, DC lighting type ultra-high pressure mercury discharge lamp. Instead of this, an AC lighting-type ultra-high pressure mercury discharge lamp, a single-ended type An ultra-high pressure mercury discharge lamp or a metal halide lamp may be used.

  The reflector 14 is a bowl-shaped member having a reflecting surface 14a for reflecting light generated in the light emitting unit 22 of the ultra high pressure discharge lamp 12 in a predetermined direction. A cylindrical discharge lamp mounting portion 38 that forms a mounting hole 36 through which the sealing portion 24 is inserted is formed.

  The heat conducting member 16 discharges the heat generated in the light emitting part 22 of the ultrahigh pressure discharge lamp 12 to the outside, and the sealing part 24 in the ultrahigh pressure discharge lamp 12 as shown in FIGS. And a cylindrical heat conducting portion 40 interposed between the outer surface of the reflector 14 and the inner surface of the mounting hole 36 in the reflector 14 (that is, the inner surface of the discharge lamp mounting portion 38), and a cylindrical shape fitted to the outer surface of the discharge lamp mounting portion 38. And a cap mounting portion 44 having an annular surface on which the cap 18 is mounted.

  The heat conducting part 40 is formed so as to cover the sealing part 24 of the ultra-high pressure discharge lamp 12 and extend to the light emitting part 22 side beyond the central part of the sealing part 24. That is, as shown in FIG. 4, when the length of the sealing portion 24 is L (for example, 22.2 mm), the tip position P of the portion (the heat conducting portion 40) that covers the sealing portion 24 of the heat conducting member 16 is sealed. It arrange | positions from the front-end | tip of the stop part 24 to the light emission part 22 side rather than the position of L / 2 (for example, 11.1 mm).

  The heat conducting member 16 is integrally formed of an oxide sintered body such as alumina (Al 2 O 3), steatite (MgO—SiO 2), mullite (3Al 2 O 3 —SiO 2), forsterite (2MgO—SiO 2) or the like. Yes. Therefore, the heat generated in the light emitting portion 22 of the ultra high pressure discharge lamp 12 is propagated from the sealing portion 24 to the heat conducting portion 40 of the heat conducting member 16 and is released from the entire surface of the heat conducting member 16 to the external space and the reflector 14. Become. The thermal conductivity of alumina (Al 2 O 3) is 16.7 W / m · K, the thermal conductivity of steatite (MgO—SiO 2) is 2.5 W / m · K, and the thermal conductivity of mullite (3Al 2 O 3 —SiO 2) is The thermal conductivity of 4.2 W / m · K and forsterite (2MgO—SiO 2) is 3.4 W / m · K. However, the heat conducting member 16 may be a sintered body of oxide having heat resistance and heat conducting properties, and the type and the mixing ratio of the constituent materials are not particularly limited.

  The cap 18 protects the tip end portion of the sealing portion 24 in the ultra-high pressure discharge lamp 12 and holds the lead wire 46 (FIG. 1), and is formed in a mortar shape from ceramic or the like. The lamp house 20 contains the ultra-high pressure discharge lamp 12, the reflector 14, the heat conducting member 16 and the cap 18 in a sealed state, and is formed in a box shape by a heat-resistant insulator such as PPS (polyphenylene sulfide). Yes. A front glass 48 for passing light emitted from the ultrahigh pressure discharge lamp 12 is attached to one side surface of the lamp house 20.

  When assembling the light source device 10, first, as shown in FIG. 4, the heat conducting part 40 of the heat conducting member 16 is fitted to the outer surface of one sealing part 24 in the ultrahigh pressure discharge lamp 12. Subsequently, the distal end portion of the heat conducting portion 40 and the outer surface of the sealing portion 24 are joined with cement 50, and the cap 18 is fixed to the cap mounting portion 44 with cement. Then, the ultrahigh pressure discharge lamp 12 is passed through the mounting hole 36 of the reflector 14 and positioned at the center of the reflector 14, and the fitting portion 42 and the discharge lamp mounting portion 38 are joined by cement. Thereafter, the ultra-high pressure discharge lamp 12, the reflector 14, the heat conducting member 16 and the cap 18 were accommodated in the lamp house 20, and lead wires 46 extending from the lead rods 30 of the ultra-high pressure discharge lamp 12 were provided in the lamp house 20. Pull out from the hole 20a. As the “cement”, alumina-silica (Al 2 O 3 —SiO 2), alumina (Al 2 O 3), or silicon carbide (SiC) can be used.

  When the drive switch of the projector is turned on after the light source device 10 is installed inside the projector, the lighting start voltage is applied to the ultrahigh pressure discharge lamp 12 and the light emitting unit 22 emits light. The light generated by the light emitting unit 22 is reflected by the reflecting surface 14a of the reflector 14 and applied to various optical elements. After receiving image information from a digital mirror device or liquid crystal, the light is projected onto the screen by a projection lens. The At this time, a large amount of heat is generated together with light in the light emitting portion 22 of the ultra high pressure discharge lamp 12, but the generated heat is propagated from the sealing portion 24 to the heat conducting member 16 and from the surface of the heat conducting member 16 to the external space. And escape to the reflector 14 efficiently. Therefore, malfunction due to abnormal heating of the ultra high pressure discharge lamp 12 can be avoided. Further, since the heat is efficiently released, the temperature decrease after the light is turned off is promoted, so that the waiting time until the light can be turned on again can be shortened.

  The inventors verified the practicality of the light source device 10 by the following test 1.

[Test 1]
Test Method: In the above-described light source device 10 (FIGS. 1 and 2), the “165 W DC lighting type” ultra-high pressure discharge lamp 12 is employed, and the “alumina-silica” cement 50 is used to attach the heat conducting member 16. It was fixed to the sealing part 24 and the reflector 14. Then, “material of the heat conducting member 16”, “tip position P of the heat conducting member 16 (FIG. 4)” and “joining mode of the heat conducting part 40 and the sealing part 24 by the cement 50” were changed to prepare samples. In addition, as "the joining aspect of the heat-conducting part 40 and the sealing part 24", "the aspect (henceforth" cement embedding ". FIG. 4) where the cement 50 was arranged in the front-end | tip part of the heat-conducting part 40" Two modes of the embodiment (hereinafter referred to as “cement insertion”, FIG. 5) in which the cement 50 is inserted by about 1 mm inside the tip portion of the heat conducting unit 40 were adopted.

  Further, in the conventional light source device 1 shown in FIG. 13, a “165 W, DC lighting type ultra-high pressure discharge lamp” is adopted as the discharge lamp 2, and an “alumina-silica cement” is adopted as the cement 4. This was used as a comparative sample.

And about each sample and the comparative sample, the temperature in the front-end | tip part of the ultrahigh pressure discharge lamp 12 was measured with the thermocouple. Moreover, the waiting time until it can be turned on again was measured. In addition, about the waiting time until it can light again, it measured about 2 types of lighting starting voltages, 1.5KV and 2.0KV.
Test results: The bulb top temperature of the ultra-high pressure discharge lamp 12 is as shown in Table 1, and the waiting time until it can be turned on again is as shown in Table 2.

表１より、導熱部材１６が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているとき（Ｐ＞Ｌ／２）に、超高圧放電灯１２の温度上昇を効果的に抑制できることが分かる。

From Table 1, when the heat conducting member 16 is formed to extend to the light emitting portion 22 side beyond the central portion (L / 2 portion) of the sealing portion 24 in the ultra high pressure discharge lamp 12 (P> L / 2). In addition, it can be seen that the temperature increase of the ultrahigh pressure discharge lamp 12 can be effectively suppressed.

表２より、導熱部材１６が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているとき（Ｐ＞Ｌ／２）に、再度点灯できるまでの待ち時間を短縮できることが分かる。

From Table 2, when the heat conducting member 16 is formed to extend to the light emitting part 22 side beyond the center part (L / 2 part) of the sealing part 24 in the ultra high pressure discharge lamp 12 (P> L / 2). In addition, it can be seen that the waiting time until it can be turned on again can be shortened.

  In the above-described embodiment, the ultra-high pressure discharge lamp 12, the reflector 14, the heat conducting member 16, and the cap 18 are accommodated in the lamp house 20. However, the present invention is, for example, a lamp house 20 as shown in FIG. The light source device 52 that does not include the light source device 52 can also be applied. In this case, the cover 48 is attached to the front portion of the reflector.

  In the above-described embodiment, the heat conducting member 16 having the heat conducting section 40, the fitting section 42, and the cap mounting section 44 is used, but instead of this, as shown in FIGS. A heat conducting member 58 in which a heat conducting portion 54 and a cap 56 are integrally formed may be used. Further, as shown in FIGS. 9 and 10, a heat conducting member 64 in which a cylindrical heat conducting portion 60 and a cap 62 are joined by cement or the like may be used. As shown in FIG. A heat conducting member 68 consisting only of the heat conducting unit 66 may be used. Further, a heat radiating plate 70 may be attached to each of the heat conducting members 16, 58, 64 and 68 as shown in FIG. However, also in these embodiments, the heat conducting members 58, 64, and 68 are oxide sintered bodies and exceed the central portion (L / 2 portion) of the sealing portion 24 in the ultrahigh pressure discharge lamp 12. Thus, it is necessary to extend to the light emitting portion 22 side.

  The inventors have used a light source device 72 (FIG. 7) using the heat conducting member 58, a light source device 74 (FIG. 9) using the heat conducting member 64, a light source device 76 (FIG. 11) using the heat conducting member 68, and a heat radiating plate 70. The practicality of the light source device 78 (FIG. 12) using the above was verified by the following tests 2 to 5.

[Test 2] Test method for the light source device 72 (FIG. 7): In the light source device 72, the “150 W direct current lighting type” super high pressure discharge lamp 12 is used, and the “alumina-silica” cement 50 is used. The heat conducting member 58 was fixed to the reflector 14 by using it. Then, samples were prepared by changing “material of heat conducting member 58”, “tip position P of heat conducting member 58” and “joining mode of heat conducting member 58 and sealing portion 24 by cement 50”.

  Further, in the conventional light source device 1 shown in FIG. 13, “150 W, DC lighting type ultra-high pressure discharge lamp” is adopted as the discharge lamp 2, and “alumina-silica cement” is adopted as the cement 4. This was used as a comparative sample.

For each sample and comparative sample, the bulb top temperature of the ultra-high pressure discharge lamp 12 was measured with a thermocouple.
Test results: The bulb top temperature of the ultra-high pressure discharge lamp 12 is as shown in Table 3.

表３より、導熱部材５８が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の温度上昇を効果的に抑制できることが分かる。

From Table 3, when the heat conducting member 58 is formed to extend to the light emitting part 22 side beyond the central part (L / 2 part) of the sealing part 24 in the ultra high pressure discharge lamp 12, the ultra high pressure discharge lamp 12 is formed. It can be seen that the temperature rise can be effectively suppressed.

[Test 3] Test method for the light source device 74 (FIG. 9): In the light source device 74, the “200 W DC lighting type” super high pressure discharge lamp 12 is used, and the “Mulite” heat conducting section 60 is “ A heat conducting member 64 to which a “made of ceramic” cap 62 was joined was employed, and the heat conducting member 64 was fixed to the reflector 14 using an “alumina-silica” cement 50. A sample was prepared by changing the “tip position P of the heat conducting member 64”. The “joining mode between the heat conducting member 64 and the sealing portion 24 by the cement 50” is “cement overlay”.

  Further, in the conventional light source device 1 shown in FIG. 13, a “200 W, DC lighting type ultra-high pressure discharge lamp” is adopted as the discharge lamp 2, and an “alumina-silica cement” is adopted as the cement 4. This was used as a comparative sample.

For each sample and comparative sample, the temperature at the tip of the ultrahigh pressure discharge lamp 12 is measured with a thermocouple, and the maintenance rate of the brightness of the ultrahigh pressure discharge lamp 12 during a predetermined lighting time (the brightness at 0 hour). Was 100).
Test results: The bulb top temperature of the ultra high pressure discharge lamp 12 is as shown in Table 4, and the brightness maintenance rate of the ultra high pressure discharge lamp 12 is as shown in Table 5.

表４より、導熱部材６４が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の温度上昇を効果的に抑制できることが分かる。

From Table 4, when the heat conducting member 64 is formed so as to extend beyond the central portion (L / 2 portion) of the sealing portion 24 in the ultra high pressure discharge lamp 12 to the light emitting portion 22 side, the ultra high pressure discharge lamp 12 is formed. It can be seen that the temperature rise can be effectively suppressed.

表５より、導熱部材６４が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の明るさの維持率が高くなることが分かる。

From Table 5, when the heat conducting member 64 is formed so as to extend beyond the central portion (L / 2 portion) of the sealing portion 24 in the ultra high pressure discharge lamp 12 to the light emitting portion 22 side, the ultra high pressure discharge lamp 12 is formed. It can be seen that the maintenance ratio of the brightness increases.

[Test 4] Test method for the light source device 76 (FIG. 11): In the light source device 76, the “100 W DC lighting type” super high pressure discharge lamp 12 is adopted, and the “steatite” heat conducting member 68 is provided. The heat conducting member 68 was fixed to the reflector 14 using an “alumina-silica” cement 50. A sample was prepared by changing the “tip position P of the heat conducting member 68”. The “joining mode between the heat conducting member 68 and the sealing portion 24 by the cement 50” was “cement overlay”.

  Further, in the conventional light source device 1 shown in FIG. 13, a “100 W DC lighting ultra-high pressure discharge lamp” is adopted as the discharge lamp 2 and an “alumina-silica cement” is adopted as the cement 4. This was used as a comparative sample.

And about each sample and the comparative sample, while measuring the temperature in the front-end | tip part of the ultrahigh pressure discharge lamp 12 with a thermocouple, the maintenance factor of the brightness of the ultrahigh pressure discharge lamp 12 in the predetermined lighting time was measured.
Test results: The temperature at the tip of the ultra high pressure discharge lamp 12 is as shown in Table 6, and the brightness maintenance rate of the ultra high pressure discharge lamp 12 is as shown in Table 7.

表６より、導熱部材６８が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の温度上昇を効果的に抑制できることが分かる。

From Table 6, when the heat conducting member 68 is formed to extend to the light emitting part 22 side beyond the central part (L / 2 part) of the sealing part 24 in the ultra high pressure discharge lamp 12, the ultra high pressure discharge lamp 12 is formed. It can be seen that the temperature rise can be effectively suppressed.

表７より、導熱部材６８が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の明るさの維持率が高くなることが分かる。

From Table 7, when the heat conducting member 68 is formed so as to extend beyond the central portion (L / 2 portion) of the sealing portion 24 in the ultra high pressure discharge lamp 12 to the light emitting portion 22 side, the ultra high pressure discharge lamp 12 is formed. It can be seen that the maintenance ratio of the brightness increases.

[Test 5] Test method for the light source device 78 (FIG. 12): In the light source device 78, the “200 W DC lighting type” super high pressure discharge lamp 12 is employed, and the “alumina” heat conducting member 68 is employed. The heat conducting member 68 was fixed to the reflector 14 using the “alumina-silica” cement 50, and the heat radiating plate 70 was fixed to the heat conducting member 68. A sample was prepared by changing the “tip position P of the heat conducting member 68”. The “joining mode between the heat conducting member 68 and the sealing portion 24 by the cement 50” was “cement overlay”.

  Further, in the conventional light source device 1 shown in FIG. 13, a “200 W, DC lighting type ultra-high pressure discharge lamp” is adopted as the discharge lamp 2, and an “alumina-silica cement” is adopted as the cement 4. This was used as a comparative sample.

And about each sample and the comparative sample, while measuring the temperature in the front-end | tip part of the ultrahigh pressure discharge lamp 12 with a thermocouple, the maintenance factor of the brightness of the ultrahigh pressure discharge lamp 12 in the predetermined lighting time was measured.
Test results: The temperature at the tip of the ultra high pressure discharge lamp 12 is as shown in Table 8, and the brightness maintenance factor of the ultra high pressure discharge lamp 12 is as shown in Table 9.

表８より、導熱部材６８が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の温度上昇を効果的に抑制できることが分かる。

From Table 8, when the heat conducting member 68 is formed to extend to the light emitting part 22 side beyond the central part (L / 2 part) of the sealing part 24 in the ultra high pressure discharge lamp 12, the ultra high pressure discharge lamp 12 is formed. It can be seen that the temperature rise can be effectively suppressed.

表９より、導熱部材６８が超高圧放電灯１２における封止部２４の中央部（Ｌ／２の部分）を越えて発光部２２側へ延びて形成されているときに、超高圧放電灯１２の明るさの維持率が高くなることが分かる。

From Table 9, when the heat conducting member 68 is formed so as to extend beyond the central portion (L / 2 portion) of the sealing portion 24 in the ultra high pressure discharge lamp 12 to the light emitting portion 22 side, the ultra high pressure discharge lamp 12 is formed. It can be seen that the maintenance ratio of the brightness increases.

It is sectional drawing which shows a light source device. It is a side view which shows a light source device. It is a perspective view which shows a heat-conduction member and a cap. It is sectional drawing which shows the joining aspect (cement mounting) of a heat-conducting member and a sealing part. It is sectional drawing which shows the joining aspect (cement insertion) of a heat-conduction member and a sealing part. It is sectional drawing which shows another light source device. It is sectional drawing which shows another light source device. It is a perspective view which shows the heat conducting member used for the light source device of FIG. It is sectional drawing which shows another light source device. It is a perspective view which shows the heat conducting member used for the light source device of FIG. It is sectional drawing which shows another light source device. It is sectional drawing which shows another light source device. It is sectional drawing which shows the conventional light source device.

Explanation of symbols

10, 52, 72, 74, 76, 78 ... Light source device 12 ... Super high pressure discharge lamp 14 ... Reflector 16, 58, 64, 68 ... Heat conducting member 18 ... Cap 20 ... Lamp house 22 ... Light emitting part 24 ... Sealing part 26 ... Sealing container 28 ... Electrode bar 34 ... Tungsten electrode electrode 36 ... Mounting hole 38 ... Discharge lamp mounting part 40, 54, 60, 66 ... Heat conducting part 42 ... Fitting part 44 ... Cap mounting part 46 ... Lead wire 48 ... Front Glass 50 ... Cement 70 ... Heat sink

Claims (4)

An ultra-high pressure discharge lamp having a light emitting part in which mercury of 0.15 mg / mm ³ or more is sealed and two sealing parts formed to extend from both ends of the light emitting part in a rod shape;
A reflector having an attachment hole through which one of the sealing portions is inserted and a reflecting surface that reflects light emitted from the light emitting portion;
A heat conducting member made of an oxide sintered body formed to extend to the light emitting part side over the central part of the sealing part so as to cover the sealing part on the side inserted into the mounting hole; Light source device.   The light source device according to claim 1, wherein a cover is attached to a front portion of the reflector.   The light source device according to claim 1, wherein the heat conducting member is interposed between an inner surface of the mounting hole and an outer surface of the sealing portion.   The light source device according to claim 1, wherein a heat radiating plate is attached to the heat conducting member.

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