WO2010084770A1 - 放電管、放電管の反射膜形成方法、および発光装置 - Google Patents
放電管、放電管の反射膜形成方法、および発光装置 Download PDFInfo
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- WO2010084770A1 WO2010084770A1 PCT/JP2010/000384 JP2010000384W WO2010084770A1 WO 2010084770 A1 WO2010084770 A1 WO 2010084770A1 JP 2010000384 W JP2010000384 W JP 2010000384W WO 2010084770 A1 WO2010084770 A1 WO 2010084770A1
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- discharge tube
- reflective film
- glass bulb
- light
- deposition
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
- G03B15/0442—Constructional details of the flash apparatus; Arrangement of lamps, reflectors, or the like
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
- G03B15/0478—Combinations of photographic apparatus with percussion type flash ignition systems
- G03B15/0484—Constructional details of the flash apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/025—Associated optical elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/84—Lamps with discharge constricted by high pressure
- H01J61/90—Lamps suitable only for intermittent operation, e.g. flash lamp
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N2005/065—Light sources therefor
- A61N2005/0654—Lamps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/0613—Apparatus adapted for a specific treatment
- A61N5/0616—Skin treatment other than tanning
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0514—Separate unit
- G03B2215/0517—Housing
- G03B2215/0525—Reflector
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0514—Separate unit
- G03B2215/0517—Housing
- G03B2215/0525—Reflector
- G03B2215/0532—Flashtube mounting
Definitions
- the present invention relates to a discharge tube used as an artificial light source for photography and the like, a method of forming a reflection film of the discharge tube, and a light emitting device.
- FIG. 10 is a cross-sectional view showing a discharge tube used in a conventional strobe device.
- a strip of light transmitting (in FIG. 10, from the surface to the back surface in FIG. 10) is left on the outer peripheral surface of the cylindrical glass bulb 92 which is a component of the discharge tube 91.
- a membrane 94 is provided.
- the reflective film 94 is formed by vapor deposition of a metal such as aluminum or silver, and plays a role of a reflector that reflects light emitted in the discharge tube 91.
- the light emission of the discharge tube 91 is caused by the light emission of the whole gas excited in the discharge tube 91, the light emission at the point L is not reflected by the reflective film 94 as shown in FIG. As shown, it is irradiated to the rear of the discharge tube 91 and becomes loss.
- the reflective film 94 formed on the discharge tube 91 has a deposition angle of 180 ° or more in the circumferential direction on the outer peripheral surface, which is more appropriate It is necessary to form in sufficient thickness in the range.
- the deposition material When a reflective film is formed by metal deposition in the direction of the arrow Y in the outer circumferential surface of the cylindrical discharge tube 91 by the conventional deposition method, the deposition material easily adheres to the outer circumferential surface 95 facing the deposition source. However, it is difficult for the deposition material to adhere to the outer peripheral surface 96 (a semi-peripheral surface far from the deposition source in the tube surface) which is a shadow from the deposition source, and the film thickness of the reflective film 96 becomes extremely thin. Therefore, the light emitted in the discharge tube 91 can not be sufficiently reflected.
- a uniform light intensity distribution can not be obtained because the amount of light is insufficient.
- the present invention provides a discharge tube with reduced loss of light quantity, a method of forming a reflective film of the discharge tube capable of obtaining a sufficient film thickness in a wide region of the outer peripheral surface, and a light emitting device capable of obtaining uniform light intensity distribution. It is a thing.
- the discharge tube of the present invention comprises a glass bulb and a reflective film formed at least in the range of 230 ° on the outer peripheral surface of the glass bulb. According to such a configuration, the light emission in the discharge tube is reflected in the irradiation direction without being irradiated to the rear of the discharge tube, so that the light quantity loss of the discharge tube can be reduced.
- the method for forming a reflective film of a discharge tube according to the present invention has a configuration of forming a reflective film on the outer surface of a glass bulb by vapor-depositing metal from a deposition source from at least two directions. With this configuration, a sufficient film thickness can be obtained in a wide region of the outer peripheral surface of the discharge tube.
- a light emitting device of the present invention includes the above-described discharge tube. With such a configuration, a component irradiated to the rear side is not generated in the light emitted in the discharge tube by the reflective film, so that a uniform light intensity distribution can be obtained. Therefore, a smaller and more efficient light emitting device can be obtained.
- FIG. 1 is a schematic view of a vacuum vapor deposition apparatus used in a method of forming a reflective film of a discharge tube according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing a vapor deposition jig used in the method of forming a reflective film of a discharge tube according to the embodiment.
- FIG. 3A is a cross-sectional view of the discharge tube for illustrating the method of forming a reflective film of the discharge tube according to the embodiment.
- FIG. 3B is another cross-sectional view of the discharge tube for illustrating the method of forming a reflective film of the discharge tube according to the embodiment.
- FIG. 1 is a schematic view of a vacuum vapor deposition apparatus used in a method of forming a reflective film of a discharge tube according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing a vapor deposition jig used in the method of forming a reflective film of a discharge tube according to the embodiment.
- FIG. 3C is still another cross-sectional view of the discharge tube for illustrating the method of forming a reflective film of the discharge tube according to the embodiment.
- FIG. 4A is a view showing the relationship between the reflectance and the film thickness of the reflective film in the discharge tube according to the embodiment.
- FIG. 4B is a characteristic diagram showing the relationship between the reflectance and the film thickness of the reflective film in the discharge tube according to the embodiment.
- FIG. 5A is a view showing the relationship between the dimensions of the discharge tube and the deposition angle of the reflective film according to the embodiment.
- FIG. 5B is a diagram showing another relationship between the dimensions of the discharge tube and the deposition angle of the reflective film according to the embodiment.
- FIG. 6A is a characteristic diagram showing the relationship between the light emission direction and the light amount of the discharge tube according to the embodiment.
- FIG. 6B is another characteristic diagram showing the relationship between the light emission direction and the light amount of the discharge tube according to the embodiment.
- FIG. 7 is a view showing comparison of color temperatures at the time of light emission of the discharge tube according to the embodiment.
- FIG. 8 is an exploded view of a main part of the strobe unit according to the same embodiment.
- FIG. 9A is a cross-sectional view showing an example of a strobe unit according to the same embodiment.
- FIG. 9B is a cross-sectional view showing another example of the strobe unit according to the embodiment.
- FIG. 10 is a cross-sectional view showing a conventional discharge tube on which a reflective film is formed.
- FIG. 1 is a schematic view of a vacuum vapor deposition apparatus used in a method of forming a reflective film of a discharge tube according to an embodiment of the present invention.
- FIG. 2 is a perspective view showing a vapor deposition jig used in the method of forming a reflective film of a discharge tube according to the embodiment.
- the glass bulb 2 is fixed to the vapor deposition jig 3 and installed in the vacuum chamber 4 of the vacuum vapor deposition apparatus 1.
- a reflective film is formed on the outer peripheral surface of the glass bulb 2 by vapor-depositing metal from the vapor deposition source 6.
- the vapor deposition jig 3 can set a plurality of glass bulbs 2 from the viewpoint of productivity.
- the deposition jig 3 is attached to the upper swing stage 5 in the vacuum chamber 4.
- the rotation stage 5 sets the rotation angle so as to swing the deposition jig 3 in the direction of the arrow W.
- a deposition source 6 of a metal material which is deposited on the glass bulb 2 to be a reflective film is installed below the vacuum chamber 4.
- a metal material such as aluminum or silver is used.
- the vapor deposition jig 3 is provided with a plurality of mask jigs 8 on a base plate 7. Each mask jig 8 is placed along the longitudinal direction of the glass bulb 2 as the object of vapor deposition. Then, after the glass bulbs 2 are placed on the mask jigs 8, portions close to both ends of the cylindrical shape in the glass bulbs 2 are fixed by the pressing plates 9. The presser plate 9 is fixed to the mounting portion 10 on the base plate 7 with screws 11 so as to abut on both ends of each glass bulb 2.
- the vapor deposition jig 3 is turned upside down (the glass bulb 2 is positioned below the mask jig 8) In the vacuum chamber 4 of the vacuum evaporation apparatus 1).
- the vapor deposition jig 3 is attached to the swing stage 5 in the vacuum chamber 4 so that the direction in which the swing stage 5 rotates and the longitudinal direction of the glass bulb 2 are orthogonal to each other. That is, when the rotation angle of the stage 5 changes, the angle of the deposition source 6 with respect to the outer periphery of the glass bulb 2 changes in the circumferential direction of the glass bulb 2. Therefore, by rotating the swing stage 5, the relative position of the glass bulb 2 and the deposition source 6 is changed, and a metal material is deposited on the outer surface of the glass bulb 2 from the deposition source 6 to form a reflective film. it can.
- the mask jig 8 is for providing a portion where the reflective film is not formed on the outer peripheral surface of the glass bulb 2, that is, a portion to be a strip-like light transmitting portion through which light is transmitted. Further, the holding plate 9 not only fixes the mask jig 8 and the glass bulb 2 but also plays a role of preventing film formation of the electrodes 12 at both ends of the glass bulb 2 and the glass at both ends.
- FIG. 3A and 3B by changing the rotation angle of the swing stage 5, the angle with respect to the outer periphery of the glass bulb 2 from the deposition source 6 is changed in the circumferential direction of the glass bulb 2 to perform two depositions.
- FIG. 3C is a cross-sectional view of the discharge tube in which the reflective film is formed by performing the deposition twice.
- the deposition jig 3 on which the mask jig 8 and the glass bulb 2 are fixed is placed in the vacuum chamber 4 and the vacuum chamber 4 is evacuated, and then the deposition source 6 is heated.
- the reflective film 13 is formed on the glass bulb 2 by evaporating the metal material.
- the rotation angle of the swing stage 5 is set, and vapor deposition is performed on the glass bulb 2 in the direction of arrow X1, as shown in FIG. 3A. Since the metal material does not adhere to the portion hidden by the mask jig 8, the reflective film 13 is not formed.
- An outer peripheral portion 15 not facing the deposition source 6 (a portion having a large angle at 90 ° to the left or right of the axis X1, ie, a half circumferential surface beyond the axis Y1) is a shade from the deposition source 6 and metal material hardly adheres thereto. . Therefore, the reflective film 13 can not be formed with the required film thickness.
- the rotation angle (for example, about 90 ° or more) of the swing stage 5 is changed to perform vapor deposition on the glass bulb 2 in the direction of arrow X2, as shown in FIG. 3B.
- FIG. 3B shows that the reflective film 13a deposited in the first step is formed from the region R1 to the region L1.
- a line not formed on the portion hidden by the mask jig 8 but not parallel to the arrow X2 and passing through the center point O of the glass bulb 2 is taken as the axis X2 and orthogonal to the axis X2
- the metal material easily adheres to the regions L2 and R2 facing the deposition source 6. Therefore, the reflective film 13 is formed to be gradually thinner from the axis X2 to the Y2 axis. This is similar to the deposition in the direction of arrow X1.
- the region L1 previously deposited exceeds the axis Y2 by the rotation of the deposition jig 3 and becomes a shade from the deposition material 6, so that it is difficult for the metal material to adhere.
- the region R1 since the region R1 is positioned so as to substantially overlap the region L2, the region R1 faces the deposition source 6, and the metal material adheres again to form the reflective film 13, thereby forming the overlapping region 16 (FIG. 3C).
- the outer peripheral portion 15 which is a shade from the deposition source 6 at the time of deposition in the direction of the arrow X1 is also located in the region R2 opposed to the deposition source 6, the metal material adheres and the reflective film 13 is formed.
- the deposition wraps around the glass bulb just by rotating the rotating stage 5 as in the present embodiment. That is, the reflection film 13 shown in FIG. 3C can be formed simultaneously on the plurality of glass bulbs 2 without rotating the respective glass bulbs 2 for vapor deposition. Therefore, the apparatus is not complicated and the cost can be reduced.
- the metal material adheres to all the outer peripheral surfaces which are not covered by the mask jig 8 of the glass bulb 2 by performing the above procedure at least twice and plural times depending on the required film thickness. That is, the discharge tube 22 shown in FIG. 3C is completed in which the deposition film 13 is formed with a thickness that does not transmit light even when the deposition angle of the reflective film 13 exceeds 180 °.
- the deposition regions R1 and L2 face the deposition source 6 more frequently than the deposition regions L1 and R2. From this, as shown in FIG. 3C, the vapor deposition film 13 is formed so that the overlapping portion 16 is formed the thickest, and the film thickness gradually decreases toward the opening 18.
- FIG. 4A and FIG. 4B are diagrams and characteristic views showing the relationship between the reflectance of the reflective film 13 formed on the discharge tube 22 and the thickness of the reflective film 13.
- silver is used as the deposition source 6 to form the reflective film 13, and the average value when the spectral reflectance in the emission wavelength range of 400 to 700 nm is measured is shown.
- the reflective film 13 is deposited to have a thickness of at least 50 nm or more, preferably 100 nm or more. If the thickness of the reflective film 13 is 50 nm or more, the reflectance of 92% of the reflector used in the conventional strobe device can be substantially achieved, and the light emitted in the discharge tube 22 is sufficiently reflected. Will be able to
- the opening portion of the reflective film 13 which is easily peeled off is formed to have a film thickness of 50 nm or more which is thin to the extent that the reflectance does not decrease.
- the reflective film thickness at the rear portion of the discharge tube where the metal particles may scatter due to the impact or heat at the time of discharge of the discharge tube is formed to be 100 nm or more to prevent the decrease of the reflected light amount. preferable.
- the entire reflection film 13 When it is desired to set the entire reflection film 13 to a reflectance higher than that of the conventional reflector, it is preferable to perform film formation at least 80 nm or more.
- the reflection film thickness of the rear portion of the discharge tube 22 is 100 nm or more by the above-described vapor deposition method. However, since the reflectance with a film thickness of 100 to 200 nm is almost the same, the reflectance can be averaged with a high reflectance of about 96% over the entire area of the reflection film 13, which is effective in suppressing light distribution unevenness.
- An area where the reflective film 13 is not formed (a portion covered by the mask jig 8) is an opening 18 (light transmitting portion) in the discharge tube 22.
- the discharge tube 22 is incorporated as a strobe device, if the angle (opening angle) of the opening 18 of the discharge tube 22 in the circumferential direction viewed from the front is less than a predetermined value, light emitted in the discharge tube is irradiated backward.
- the discharge tube 22 incorporated as a strobe device is viewed from the front and the opening 18 is not located forward of the end of the reflective film 13, the light emitted in the discharge tube may be irradiated backward. Will occur.
- the component irradiated backward is a loss of light quantity.
- the opening angle is 2 ⁇
- the outer radius of the discharge tube 22 is Ro
- the inner radius of the discharge tube 22 is Ri
- cos ⁇ Ri / Ro
- An example of the deposition angle of the reflective film 13 is shown in FIG. 5A based on the size of a small diameter flash discharge tube generally manufactured.
- the area where the reflective film is formed is at least 240 °.
- the reflective film 13 is not formed on the portion hidden by the mask jig 8, it is possible to form a film in an appropriate area where the reflective film 13 is required.
- the reflection film in the case of a flash light having a large light emission amount by making the outer shape of the flash bulb smaller by making the outer shape of the glass bulb 2 smaller and making the outer shape of the glass bulb 2 larger to increase the volume of the enclosed gas.
- An example of 13 deposition angles is shown in FIG. 5B.
- the area for forming the reflective film is set to at least about 230 °.
- the manufacturing error (part tolerance) of the discharge tube 22, etc. it is preferable to set the area where the reflective film is formed to at least about 290 °.
- the film formation is performed at an angle of at least 230 ° by changing the relative angular position of the discharge tube 22 and the deposition source 6 around the axis of the discharge tube 22 by the method of forming a reflective film according to this embodiment.
- FIG. 6A is a characteristic diagram showing the relationship of the light quantity to the light irradiation direction of the discharge tube 22 according to the present embodiment, and the light quantity in the vertical direction, that is, the energy quantity within the required angle Each deposition angle is shown.
- FIG. 6B is a characteristic diagram showing the relationship of the attenuation amount to the light irradiation direction of the discharge tube 22 according to the embodiment, and the attenuation within a required angle with reference to the light distribution in the vertical direction, ie, the central light amount.
- the rates are shown for each of a plurality of deposition angles of the deposition film.
- the numbers (0 °, 180 °,... 310 °) of the characteristic curves shown in the respective drawings represent the deposition angles of the deposited film.
- the light axis of the discharge tube 22 is in the horizontal direction.
- the required specification of the strobe device is set to an angle of view of a focal length of 28 mm in 35 mm lens conversion, and the irradiation angle in the vertical direction of the discharge tube 22 with respect to the optical axis is suitable for the specification. It was set to about 54 ° in total by 27 °. Then, the discharge which formed the deposition angle of the reflective film 13 at 180 ° to 310 ° (opening angle of the reflective film 13 at 50 ° to 180 °) on the glass bulb 2 having an outer diameter of 1.3 mm and an inner diameter of 0.85 mm. Light was emitted using the tube 22 and the discharge tube 22 without the reflective film 13.
- the input voltage to the discharge tube 22 was 320 V, and the capacity of the main capacitor was 75 ⁇ F.
- the discharge tube 22 was made to emit light without using the optical panel. If the aperture is too narrow, it focuses only on the center. Also, in the case of a light emitting tube using a glass bulb, it is not possible to design the light distribution simply by the light source alone. Therefore, it is more convenient for the light to leak outside than 54 ° because it is better to combine with the reflector and the panel. It is preferable to have a flat light distribution without having a large peak as much as possible in the region of 54 °.
- the exposure dose in the range of up to 27 ° respectively is approximated by about 30 lux ⁇ sec.
- the deposition angle is 230 ° or more, the amount of light at the central portion increases by about 2 lux ⁇ sec each time the deposition angle increases by 10 ° (the opening narrows by 10 °). From this, by narrowing the aperture angle, it is possible to reduce the loss of light irradiated outside the irradiation range.
- a deposition angle of about 230 ° to about 290 ° is an optimum range.
- the range setting of the deposition angle may be set based on the above-mentioned equation from the outer diameter and the inner diameter of the discharge tube 22 used.
- the deposition angle is set to be about 260 ° according to the above equation.
- the exposure amount is 35 lux ⁇ sec up to around 17 ° each in the vertical direction, and the light quantity reduction is suppressed to about 10% even at around 27 ° in the vertical direction. That is, it is possible to simultaneously achieve the reduction of the light amount loss and the suppression of the irradiation unevenness.
- a protective layer may be provided after the reflective film 13 is deposited.
- the protective layer is formed by placing the discharge tube 22 on which the reflective film 13 is formed in a furnace heated at 500 to 700 ° C. and spraying metal such as tin or indium on the outer peripheral surface of the discharge tube 22.
- Metals such as tin and indium are used as a transparent conductive film (nesa film) in a general flash discharge tube. Therefore, even when the reflection film 13 is formed on the outer peripheral surface of the discharge tube 22, the light of the discharge tube 22 can be transmitted. On top of that, since it becomes a transparent crystal layer by spraying in a heated furnace, it is most suitable as a protective layer of the reflective film 13.
- FIG. 7 shows a comparison of color temperatures at the time of light emission of a general discharge tube and a discharge tube according to the present invention.
- FIG. 7 shows an example in which a protective film made of a transparent conductive film and a reflective film 13 are formed by the following four types of combinations using two types of discharge tubes 22 with an outer diameter of 1.3 mm and 1.8 mm. It shows the result of measuring the color temperature at the time of light emission by connecting to a circuit with a voltage of 320 V and a main capacitor of 75 ⁇ F.
- the color temperature of the discharge tube 22 with a protective film and a reflective film is lower than that of the discharge tube 22 without a protective film and without a reflective film.
- the color temperature is about 200 K lower than that of the discharge tube 22 without the protective film and with the reflective film.
- the light of the discharge tube 22 may cause the optical panel of the strobe device to become cloudy.
- the protective layer of the present invention it is possible to reduce the color temperature of the discharge tube 22 and to suppress the deterioration such as the white turbidity of the optical panel.
- the above-described discharge tube 22 sets the area where the reflective film 13 is formed to at least 230 °, so that the light emitted in the discharge tube 22 does not generate a component to be irradiated to the rear, and high efficiency A strobe device can be obtained.
- FIG. 8 is an exploded view of a strobe unit in which the discharge tube 22 and the reflecting member 19 are combined.
- FIG. 9A is a cross-sectional view showing an example of a strobe unit 17 using a discharge tube 22 having a reflective film 13 as a light emitting unit. The reflective member 19 is closely attached to the discharge tube 22 shown in FIG. 9A, and the transparent optical panel 20 is further combined.
- the reflective film 13 is formed on the discharge tube 22, and the reflective film 13 is vapor-deposited up to the front (in the direction of the reflective member 19) of the inner diameter edge of the discharge tube 22. Therefore, it is not necessary to provide a reflector at the back where light is emitted. However, the reflective member 19 is used to collect light emitted from the opening 18 and scattered forward to increase the luminous efficiency.
- the reflection member 19 is formed such that an opening 19 a in close contact with the discharge tube 22 overlaps the end 13 b of the reflection film 13.
- the stroboscopic unit 17 composed of the discharge tube 22 and the reflective member 19 on which the reflective film 13 is vapor-deposited is not a structure in which a reflector is provided at the rear in this way, and the light can be efficiently collected by the reflective film 13. Can be made smaller. Therefore, a small strobe device can be obtained.
- a gap is not formed between the opening 19 a of the reflecting member 19 and the opening 18 of the discharge tube 22. If a gap is formed between the opening 19a of the reflecting member 19 and the opening 18 of the discharge tube 22, flash light of the discharge tube 22 leaks from this gap, resulting in a loss of light quantity.
- FIG. 9B shows the strobe unit 17 when the reflective member 19 is used as a mask jig for deposition, and the discharge tube 22 and the reflective member 19 are combined and fixed to the deposition jig to deposit the reflective film 13.
- the reflecting member 19 does not overlap with the end 13 b of the reflecting film 13.
- the reflection film 13 can be formed more easily at an appropriate deposition angle.
- the gap between the discharge tube 22 and the reflection member 19 is covered with the deposited metal material, the gap between the discharge tube 22 and the reflection member 19 is difficult to form, and the discharge tube is the same as the configuration of FIG. 9A.
- the flash light 22 does not form a gap between the opening 19 a of the reflecting member 19 and the opening 18 of the discharge tube 22. Therefore, it is possible to easily obtain a high efficiency strobe device with less light loss.
- the rotating stage 5 is rotated to change the angle from the deposition source 6 with respect to the outer periphery of the discharge tube 22.
- the invention is not limited to this.
- the discharge tubes 22 may be individually rotated one by one.
- the deposition source 6 may be moved to change the angle with respect to the outer periphery of the discharge tube 22.
- the discharge tube used for the strobe device has been described.
- discharge tubes such as a light irradiation treatment device that treats a skin disease using a xenon lamp, a light beauty device that smoothes rough skin using the same xenon lamp, a light hair removal device using a flash lamp, etc.
- Therapeutic devices and cosmetic devices using the same have also been developed.
- a light emitting device used for such a treatment device or a cosmetic device also needs to condense light emitted by the discharge tube in the direction of the skin or the skin.
- a discharge tube in which a reflective film is formed at least 230 ° on the outer peripheral surface of the glass bulb is used. Can reduce the loss of light to the skin and the skin, and enhance the effects of treatment and beauty.
- the discharge tube of the present invention includes the glass bulb and the reflective film formed in the range of at least 230 ° on the outer peripheral surface of the glass bulb. According to such a configuration, the light emission in the discharge tube is reflected in the irradiation direction without being irradiated to the rear of the discharge tube, so that the light quantity loss of the discharge tube can be reduced.
- the reflective film is formed in the range of 230 ° to 290 ° on the outer peripheral surface of the glass bulb. According to this configuration, it is possible to achieve both reduction in light amount loss and irradiation unevenness.
- the discharge tube of the present invention has a region in which the reflective film is formed with a thickness of at least 50 nm. According to this configuration, since the reflective film is deposited so as not to be extremely thin, the light emitted in the discharge tube is reflected without being transmitted through the reflective film, and is more reliably collected in the optical axis direction of the discharge tube Is possible.
- the film thickness of the reflective film is formed to increase from the opening where the reflective film is not formed to the rear.
- the metal characteristics elastic modulus
- the metal particles are scattered by heat or impact, and gradually thin to transmit light. Therefore, in order to use it as a reflective film, it is necessary to have a certain thickness or more. Therefore, in the discharge tube of the present invention, since the opening portion of the reflective film which is easily peeled off is formed thin, peeling of the reflective film becomes difficult to occur.
- the reflection film thickness at the rear portion of the discharge tube that reflects a large amount of light is formed thick, it is possible to prevent a decrease in reflectance even if metal particles are scattered.
- a protective layer is formed on the surface of the reflective film. According to this configuration, the protective film prevents the deterioration and peeling of the reflective film, and the color temperature of light transmitted through the protective film can be reduced at the opening of the reflective film.
- the protective layer is a metal thin film.
- the metal thin film can further prevent the deterioration and peeling of the reflective film, and the color temperature of the light transmitted through the metal thin film can be further reduced at the opening portion of the reflective film.
- the method for forming a reflective film of a discharge tube according to the present invention has a configuration of forming a reflective film on the outer surface of a glass bulb by vapor-depositing metal from a deposition source from at least two directions.
- the metal material can be deposited so as to adhere from different angles, so that a sufficient film thickness can be obtained in a wide region of the outer peripheral surface of the discharge tube, for example, at least 230 °.
- the reflective film is formed in the range of at least 230 ° on the outer peripheral surface of the glass bulb.
- the method for forming a reflective film of a discharge tube according to the present invention has a configuration in which the relative position between the glass bulb and the deposition source is changed in the outer peripheral direction of the glass bulb to perform deposition. According to this configuration, the surface which is a shade from the deposition source disappears on the outer peripheral surface of the glass bulb, and the metal particles adhere to the portion which was the end of the deposition range at the previous deposition. Therefore, even when the deposition angle of the reflective film is large, it is possible to obtain a necessary film thickness.
- the reflective film in the second step is formed by performing deposition on the reflective film formed in the first step. According to this configuration, it is possible to obtain the required film thickness even when the deposition angle of the reflective film is large.
- the method for forming a reflective film of a discharge tube according to the present invention has a configuration in which, when metal is deposited on the outer surface of the glass bulb, a region where metal is not deposited by deposition is provided using a mask jig. According to this configuration, the metal material does not adhere to the portion hidden by the mask jig, so that the metal can be used in an appropriate area where the reflective film is required even if the facing position between the discharge tube and the deposition source is changed. The material is deposited.
- the method for forming a reflective film of a discharge tube according to the present invention has a configuration in which the reflective member provided on the front surface of the glass bulb is used as a mask jig in a state of being in close contact with the outer peripheral surface of the glass bulb. According to this configuration, the reflective film can be formed more easily at an appropriate deposition angle. At the same time, since the gap between the discharge tube and the reflecting member is covered with the deposited metal material, the gap between the discharge tube and the reflecting member is eliminated, and a high efficiency strobe device with little loss of light quantity can be obtained easily. .
- the light emitting device of the present invention has a configuration in which the discharge tube is used as a light emitting portion. According to such a configuration, the light emitted in the discharge tube by the reflective film does not generate a component to be irradiated backward, so that a compact and more efficient light emitting device can be obtained.
- the light emitting device of the present invention has a configuration in which a reflecting member is provided in front of the discharge tube. According to this configuration, it is possible to obtain a more efficient light emitting device because the reflecting member collects the light radiated forward and scattered to increase the light emission efficiency.
- the present invention is useful for a stroboscopic device, a treatment, a light emitting device for beauty and the like because a small-sized, high-efficiency discharge tube with less light loss can be obtained.
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Stroboscope Apparatuses (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
cosθ = Ri/Ro
という関係が成り立つ。したがって、放電管22の外半径Roと内半径Riとの比に対応させて、θを一定値以下にする必要がある。一般的に製造されている細径の閃光放電管の寸法を基に、反射膜13の蒸着角度の例を図5Aに示す。
(2)保護膜あり・反射膜13なし
(3)保護膜なし・反射膜13あり
(4)保護膜あり・反射膜13あり
図7からわかるように、保護膜なし・反射膜なしの放電管22に比べ、保護膜あり・反射膜ありの放電管22は約400~600K色温度が低下している。保護膜なし・反射膜ありの放電管22と比べても約200K色温度が低下している。
2 ガラスバルブ
3 蒸着治具
4 真空チャンバ
5 煽りステージ
6 蒸着源
7 ベース板
8 マスク用治具
9 押え板
10 取付け部
11 ネジ
12 電極
13,13a 反射膜
13b 端部
14,15 外周面
16 重複部分
17 ストロボユニット
18,19a 開口部
19 反射部材
20 光学パネル
22 放電管
Claims (15)
- ガラスバルブと、前記ガラスバルブの外周面の少なくとも230°の範囲に形成された反射膜とを備えた放電管。
- 前記反射膜が、前記ガラスバルブの外周面の230°~290°の範囲に形成された請求項1記載の放電管。
- 前記反射膜が、少なくとも50nmの厚さで形成された領域を有する請求項1記載の放電管。
- 前記反射膜の膜厚が、前記反射膜が形成されていない開口部から後方にかけて厚くなるように形成された請求項1記載の放電管。
- 前記反射膜の表面に、保護層が形成された請求項1記載の放電管。
- 前記保護層が、金属薄膜である請求項5記載の放電管。
- ガラスバルブの外表面に少なくとも2方向の蒸着源から金属を蒸着することにより反射膜を形成する放電管の反射膜形成方法。
- ガラスバルブの外表面に蒸着源からの金属を蒸着することにより反射膜を形成する第1ステップと、前記第1ステップの後、前記ガラスバルブと前記蒸着源との相対位置を変化させて、前記ガラスバルブの外表面に前記蒸着源から金属を蒸着することにより前記反射膜を形成する第2ステップとを備えた放電管の反射膜形成方法。
- 前記反射膜が、前記ガラスバルブの外周面の少なくとも230°の範囲に形成された請求項7または8のいずれか1項に記載の放電管の反射膜形成方法。
- 前記ガラスバルブと前記蒸着源との相対位置を、前記ガラスバルブの外周方向に変化させて蒸着を行う請求項8記載の放電管の反射膜形成方法。
- 前記第2ステップにおける前記反射膜は、前記第1ステップで形成された前記反射膜に重ねて蒸着をおこなうことにより形成する請求項8記載の放電管の反射膜形成方法。
- 前記ガラスバルブの外表面に前記金属を蒸着する際に、マスク用治具を用いて前記金属が蒸着成膜されない領域を設ける請求項7または8のいずれか1項に記載の放電管の反射膜形成方法。
- 前記ガラスバルブの前面に設けられる反射部材を、前記ガラスバルブの外周面と密接させた状態で前記マスク用治具として用いる請求項12記載の放電管の反射膜形成方法。
- 請求項1~6のいずれか1項に記載の放電管を発光部に用いた発光装置。
- 前記放電管の前方に反射部材を設けた請求項14記載の発光装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/145,458 US8604685B2 (en) | 2009-01-26 | 2010-01-25 | Electric discharge tube, method for forming reflective film of electric discharge tube, and light emitting device |
CN201080005402.0A CN102292794B (zh) | 2009-01-26 | 2010-01-25 | 放电管、放电管的反射膜形成方法及发光装置 |
JP2010547445A JP5267576B2 (ja) | 2009-01-26 | 2010-01-25 | 放電管、放電管の反射膜形成方法、および発光装置 |
EP10733377.5A EP2383770B1 (en) | 2009-01-26 | 2010-01-25 | Electric discharge tube, method for forming reflective film of electric discharge tube, and light emitting device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2009-014017 | 2009-01-26 | ||
JP2009014017 | 2009-01-26 |
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PCT/JP2010/000384 WO2010084770A1 (ja) | 2009-01-26 | 2010-01-25 | 放電管、放電管の反射膜形成方法、および発光装置 |
Country Status (6)
Country | Link |
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US (1) | US8604685B2 (ja) |
EP (1) | EP2383770B1 (ja) |
JP (1) | JP5267576B2 (ja) |
KR (1) | KR20110119667A (ja) |
CN (1) | CN102292794B (ja) |
WO (1) | WO2010084770A1 (ja) |
Cited By (2)
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WO2011058732A1 (ja) | 2009-11-11 | 2011-05-19 | パナソニック株式会社 | ストロボ装置とそれを用いた撮像装置 |
US20120293060A1 (en) * | 2010-03-12 | 2012-11-22 | Panasonic Corporation | Discharge tube and stroboscopic device |
Families Citing this family (4)
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JP5505446B2 (ja) * | 2012-03-19 | 2014-05-28 | ウシオ電機株式会社 | フラッシュランプ |
TWI510734B (zh) * | 2013-07-17 | 2015-12-01 | Lextar Electronics Corp | 防觸電發光二極體照明燈具與於防觸電發光二極體照明燈具之殼體上形成透明導電線路的方法 |
KR102219742B1 (ko) * | 2013-07-31 | 2021-02-23 | 가부시키가이샤 지에스 유아사 | 방전 램프 |
JP6201925B2 (ja) * | 2013-07-31 | 2017-09-27 | 株式会社Gsユアサ | 放電ランプ |
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- 2010-01-25 KR KR1020117017458A patent/KR20110119667A/ko not_active Application Discontinuation
- 2010-01-25 US US13/145,458 patent/US8604685B2/en not_active Expired - Fee Related
- 2010-01-25 JP JP2010547445A patent/JP5267576B2/ja not_active Expired - Fee Related
- 2010-01-25 EP EP10733377.5A patent/EP2383770B1/en not_active Not-in-force
- 2010-01-25 WO PCT/JP2010/000384 patent/WO2010084770A1/ja active Application Filing
- 2010-01-25 CN CN201080005402.0A patent/CN102292794B/zh not_active Expired - Fee Related
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US20120293060A1 (en) * | 2010-03-12 | 2012-11-22 | Panasonic Corporation | Discharge tube and stroboscopic device |
US8664845B2 (en) * | 2010-03-12 | 2014-03-04 | Panasonic Corporation | Discharge tube and stroboscopic device |
Also Published As
Publication number | Publication date |
---|---|
EP2383770A1 (en) | 2011-11-02 |
US20120019119A1 (en) | 2012-01-26 |
EP2383770A4 (en) | 2013-02-13 |
JPWO2010084770A1 (ja) | 2012-07-19 |
KR20110119667A (ko) | 2011-11-02 |
EP2383770B1 (en) | 2014-11-05 |
JP5267576B2 (ja) | 2013-08-21 |
CN102292794A (zh) | 2011-12-21 |
US8604685B2 (en) | 2013-12-10 |
CN102292794B (zh) | 2014-03-26 |
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