WO1993017447A1 - A high intensity lamp - Google Patents
A high intensity lamp Download PDFInfo
- Publication number
- WO1993017447A1 WO1993017447A1 PCT/JP1993/000226 JP9300226W WO9317447A1 WO 1993017447 A1 WO1993017447 A1 WO 1993017447A1 JP 9300226 W JP9300226 W JP 9300226W WO 9317447 A1 WO9317447 A1 WO 9317447A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- bulb
- cutting
- lamp
- high intensity
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/40—Devices for influencing the colour or wavelength of the light by light filters; by coloured coatings in or on the envelope
Definitions
- This invention relates to a high intensity lamp capable of radiating an illuminating light generated from a bright light source to a side of a face to be illuminated after an ultraviolet ray component thereof has effectively been cut-off.
- a high intensity lamp such as a halogen lamp having a heat radiating light source or a metal halide lamp having a luminescence light source, is employed as a head lamp or a fog lamp for an automobile, or a lamp for spot illumination such as in a display illumination or in a projection-type liquid crystal TV set.
- a glass is normally employed which allows transmission of an ultraviolet light ray having a wavelength in a range of 250 through 400 nm, such as quartz glass, borosilicate glass, or aluminium silicate glass.
- the outer cover which covers the car surface of an automobile a display material composed of textiles such as a clothing which is disposed at the face to be illuminated, or a liquid crystal panel which is essentially apt to be deteriorated by the ultraviolet light ray, is exposed to the ultraviolet light ray having high density. Therefore, there is an inconvenience wherein the transmitted ultraviolet light ray deteriorates quality and function of a member disposed at the face to be illuminated, or wherein colors thereof are faded. Furthermore, since a light ray having a wavelength of not more than 315 nm is particularly poisonous to a human body, an improvement is desired in view of safety.
- a high intensity lamp which radiates an illuminating light generated from a heat radiating light source or a luminescence light source to a side of a face to be illuminated by transmitting the illuminating light through a bulb glass and/or a front glass of a bulb, wherein the bulb glass and/or the front glass of a glass is or are formed by a glass provided with an ultraviolet light ray cutting-off function having a cutting-off limit in a wavelength range of 350 through 430 nm and a width of cutting-off inclination of not larger than 20 nm.
- the illuminating light generated by the light source of the high intensity lamp radiates the face to be illuminated after effectively cutting-off the ultraviolet light ray component thereof by the bulb glass and/or the front glass of a bulb. Therefore, the member disposed on the side of the face to be illuminated is protected from a ultraviolet ray hazard such as color fading or quality deterioration, durability thereof is promoted and bad influence on the human body can be prevented.
- a ultraviolet ray hazard such as color fading or quality deterioration
- Figure 2 is an enlarged front diagram of the halogen lamp in Figure 1;
- Figure 3 is a front diagram of a metal halide lamp of this invention
- Figure 4 is a graph comparing situations of cutting- off ultraviolet light ray components of a high intensity lamp formed by using a bulb glass composing this invention and a high intensity lamp formed by using a conventional bulb glass.
- a high intensity lamp 11 shown in Figure 1 is integrated with a halogen lamp.
- a halogen lamp as shown in Figure 2 in details, an enclosed gas such as inert argon, iodine, bromine and the like, are enclosed in a bulb glass 12 having a base 21, a tungsten filament 15 glows and a light having high density generated by the glow, can be radiated.
- the light radiated by the halogen lamp is reflected by a reflecting face 13, and transmits through a front glass 14 of the bulb by which the light is condensed, thereby enabling to be radiated to the side of a face to be illuminated.
- the high intensity lamp 11 shown in Figure 3 shows an example of a metal halide lamp which can preferably be employed as a lamp for spot illumination such as in a display illumination or a projection-type liquid crystal TV set since a color rendition thereof is excellent.
- a quartz arc tube 18 is provided enclosed with mercury, argon and a metal halide.
- Light generation of metallic atoms decomposed in a mercury arc generated between electrodes 19 and 20 in the quartz arc tube 18, is utilized as a luminescence light source, which is radiated to the side of the face to be illuminated.
- the high intensity lamp 11 is often integrated with a reflecting plate (not shown) and a front glass (not shown) in front of a bulb, thereby enabling to concentratingly radiate in one direction.
- cutting-off limit is defined by a wavelength disposed at a median between two wavelengths having transmittances of 5% and 72%
- width of cutting-off inclination is defined by a difference between the wavelengths having the transmittances of 5% and 72%.
- the provided bulb glass 12 or 17 and/or the front glass 14 of a bulb can be provided with an extremely sharp cutting-off function wherein the width of cutting-off inclination is not more than 20 nm in the ultraviolet light ray range.
- the cutting-off limit when the cutting-off limit is under 350 nm, the cutting-off the ultraviolet light ray component is insufficient. On the other hand, when the cutting-off limit exceeds 430 nm, absorption of a visible light ray takes place and, therefore, undesirable coloration is remarkably provided.
- the cutting-off limit of the glass precipitated with microcrystals is in a range of 350 through 380 nm for CuC ⁇ and 400 through 430 nm for CuBr, respectively.
- the range of the cutting- off limit can be controlled to be long or short in the spectro range above mentioned, by controlling the grain size of the respective precipitated microcrystals.
- the glass material having the cutting-off limit in a range of 350 through 430 nm can be formed.
- a heat treatment is necessary after the glass material is molten and formed for precipitating the microcrystals.
- the cutting-off limit and the width of cutting-off inclination can be controlled.
- the heat treatment in this case can be performed, for instance, after the glass material is formed into the bulb glass 12 or 17 and/or the front glass 14 of a bulb and annealed. Or, the heat treatment can be performed simultaneously with the annealing operation in an on-line annealing step after the melting and the forming. In any way r the method of making thereof can be performed by the publicly-known various steps of melting, forming, annealing and heat-treating without any restriction.
- the bulb glass of this invention can be formed into a hollow spherical body having a pertinent shape covering a light source such as in the bulb glass 12 or 17 illustrated as above, or a tube-like body, or an outer bulb for covering the lamp per se.
- the front glass 14 of a bulb can be formed into a pertinent desired shape by pressing, such as a plane, a curved face, a lens-like shape or the like.
- the illuminating light which is generated from the heat radiating light source having the filament 15 or the luminescence light source having the quartz arc tube 18 radiates and illuminates the side of the face to be illuminated, while effectively cutting-off the generated ultraviolet light ray component, by transmitting through the bulb glass 12 or 17 and/or the front glass 14 of a bulb provided with the ultraviolet light ray cutting-off function having the cutting-off limit in a range of 350 through 430 nm and the width of cutting-off inclination of not more than 20 nm.
- the member composed of a synthetic resin material or a textile material disposed on the side of the face to be illuminated is radiated without receiving the ultraviolet light ray hazard such as color fading or quality deterioration, it is possible to enjoy an illuminating effect having a high illuminating light density, while the durability of the member per se is remarkably promoted.
- Figure 4 shows a radiation intensity which is measured by employing the following method, to confirm the ultraviolet light ray cutting-off function employing the high intensity lamp of this invention.
- a cylindrical body (bulb glass) having a thickness of 1 mm is formed by melting alkali borosilicate glass composed to contain CuC ⁇ and CuBr by 1.0 wt%, respectively at 1450°C, forming it in a cylindrical shape and heat-treating it at 500°C for 1 hour.
- the cylindrical body (bulb glass) provided as above is covered on a metal halide lamp on sale and a radiation intensity of light radiated by transmitting through the cylindrical body (bulb glass), is measured.
- the bold line portion 2 of the distribution curve 1 between 300 nm and 400 nm designates a radiation intensity in case of not covering the cylindrical body (bulb glass) on the metal halide lamp
- the dotted line 3 the radiation intensity in case of covering the cylindrical body (bulb glass) on the metal halide lamp.
- the bulb glass (cylindrical body) is provided with the ultraviolet light ray cutting-off function having the cutting-off limit of 390 nm and the width of cutting-off inclination of 10 nm. Therefore, it is clarified that the ultraviolet light ray component in the illuminating light generated by the light source can effectively be cut-off by employing the bulb glass of this invention.
- the illuminating light generated from the light source of the high intensity lamp illuminates the surface to be illuminated while the ultraviolet light ray component thereof is effectively cut-off by the bulb glass and/or the front glass of a bulb. Accordingly, the member disposed on the side of the face to be illuminated can be protected from the ultraviolet light ray hazard such as color fading or quality deterioration, the durability thereof can be promoted and the bad influence on a human body can be prevented.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4/19042U | 1992-02-28 | ||
JP019042U JPH0572041U (en) | 1992-02-28 | 1992-02-28 | High intensity lighting lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993017447A1 true WO1993017447A1 (en) | 1993-09-02 |
Family
ID=11988371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/000226 WO1993017447A1 (en) | 1992-02-28 | 1993-02-24 | A high intensity lamp |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0582717A1 (en) |
JP (1) | JPH0572041U (en) |
WO (1) | WO1993017447A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1261017A1 (en) * | 2001-05-23 | 2002-11-27 | Corning Incorporated | Arc discharge lamp, adapted glass faceplate and method of controlling UV transmission |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1496072A1 (en) * | 1962-03-15 | 1970-04-30 | Corning Glass Works | Filter material absorbing ultraviolet radiation and an electric lamp made therefrom |
US4298005A (en) * | 1976-03-05 | 1981-11-03 | Mutzhas Maximilian F | Radiation apparatus |
EP0383634A2 (en) * | 1989-02-17 | 1990-08-22 | Kabushiki Kaisha Toshiba | Ultraviolet-suppressed light source, coating agent used in the same, and method for manufacturing the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006378A (en) * | 1975-10-01 | 1977-02-01 | General Electric Company | Optical coating with selectable transmittance characteristics and method of making the same |
-
1992
- 1992-02-28 JP JP019042U patent/JPH0572041U/en active Pending
-
1993
- 1993-02-24 WO PCT/JP1993/000226 patent/WO1993017447A1/en not_active Application Discontinuation
- 1993-02-24 EP EP19930904343 patent/EP0582717A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1496072A1 (en) * | 1962-03-15 | 1970-04-30 | Corning Glass Works | Filter material absorbing ultraviolet radiation and an electric lamp made therefrom |
US4298005A (en) * | 1976-03-05 | 1981-11-03 | Mutzhas Maximilian F | Radiation apparatus |
EP0383634A2 (en) * | 1989-02-17 | 1990-08-22 | Kabushiki Kaisha Toshiba | Ultraviolet-suppressed light source, coating agent used in the same, and method for manufacturing the same |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 15, no. 394 (E-1119)7 October 1991 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1261017A1 (en) * | 2001-05-23 | 2002-11-27 | Corning Incorporated | Arc discharge lamp, adapted glass faceplate and method of controlling UV transmission |
Also Published As
Publication number | Publication date |
---|---|
EP0582717A1 (en) | 1994-02-16 |
JPH0572041U (en) | 1993-09-28 |
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