EP0110645A2 - Photodrucklampen - Google Patents
Photodrucklampen Download PDFInfo
- Publication number
- EP0110645A2 EP0110645A2 EP83307089A EP83307089A EP0110645A2 EP 0110645 A2 EP0110645 A2 EP 0110645A2 EP 83307089 A EP83307089 A EP 83307089A EP 83307089 A EP83307089 A EP 83307089A EP 0110645 A2 EP0110645 A2 EP 0110645A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- arc tube
- tube
- lamp
- volume
- per
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- BQZGVMWPHXIKEQ-UHFFFAOYSA-L iron(ii) iodide Chemical class [Fe+2].[I-].[I-] BQZGVMWPHXIKEQ-UHFFFAOYSA-L 0.000 claims abstract description 16
- 230000005855 radiation Effects 0.000 claims abstract description 7
- DWRNSCDYNYYYHT-UHFFFAOYSA-K gallium(iii) iodide Chemical compound I[Ga](I)I DWRNSCDYNYYYHT-UHFFFAOYSA-K 0.000 claims description 15
- 229910021579 Iron(II) iodide Inorganic materials 0.000 claims description 13
- 229910052753 mercury Inorganic materials 0.000 claims description 12
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 11
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229910005263 GaI3 Inorganic materials 0.000 claims 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052733 gallium Inorganic materials 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 abstract 1
- 229910001507 metal halide Inorganic materials 0.000 description 4
- 150000005309 metal halides Chemical class 0.000 description 4
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- HEJPGFRXUXOTGM-UHFFFAOYSA-K iron(3+);triiodide Chemical compound [Fe+3].[I-].[I-].[I-] HEJPGFRXUXOTGM-UHFFFAOYSA-K 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
Definitions
- This invention relates to discharge lamps, primarily but not exlusively for the photoprinting industry.
- diazo diazo
- photopolymer printing plates which are then used to transfer ink to the printing paper.
- the former diazo
- the latter requires a lamp having a spectral energy distribution which peaks at approximately 420nm while the latter material requires a lamp having a spectral energy distribution peaking at approximately 380nm.
- these different requirements are met by two different lamps each with a fill designed to produce radiation of the desired wavelength.
- a lamp with a fill of 1.3 mg of gallium tri iodide would be would be used for diazo prints while a lamp with a fill of 2.5mg of iron iodide would be used for the polymer material, each lamp of course would have the necessary fill of mercury.
- Metal halide lamps having in addition to mercury, a mixture of gallium and ferric iodide are disclosed in the article "A metal halide lamp using both gallium and ferric iodides" by Shunji Kondoh, Lighting Research Laboratory, Lamp and Lighting Division, Storage Battery Co. Kyoto, Japan.
- the lamps disclosed therein are restricted to linear tubular lamps of 1000-5000 watts and are lengths of between 98 to 200mm. These lamps require some kind of cooling system because of the heat generated.
- the present invention embraces a discharge arc tube having a basic fill of mercury plus between 0.025 to 1.0mg GaI 3 per cc of the arc tube volume and between 0.1 to 1.Omg of FeI 2 per cc of the arc tube volume.
- a sealed beam reflector lamp for photoprinting comprising in combination a reflector and a discharge lamp arc tube of quartz material, the reflector including a dichroic or aluminised layer selected to reflect ultra violet radiation and the discharge lamp arc tube including spaced electrodes to sustain a discharge therebetween and a fill selected from:
- an arc tube of quartz material for a sealed beam reflector photoprinting lamp said arc tube including spaced electrodes to sustain a discharge therebetween, the arc tube, in addition to mercury, having a fill including between 0.025 to 1.0 mg GaI 3 per cc of the arc tube volume plus between 0.1 to 1 mg of FeI 2 per cc of the are tube volume.
- the outer jacket By providing the outer jacket with a dichroic layer on the inner rear surface thereof and positioning the discharge arc tube near the focus of the reflector, radiation can be diffused through the prismatic window at the front of the reflector and a substantially uniform directionally controlled beam of light is produced.
- the dichroic layer reflects UV radiation and provides for heat dispersal.
- the glass outer jacket affords a high degree of protection from short wave UV radiation.
- the geometry of the discharge arc tube with an electrode length of approximately 25mm or less and a diameter of 26mm allows a high wall loading and a hot restart facility. If a hot re-start facility is not required then an aluminised reflector may be substituted for the dichroic layer. This feature combined with a fast run up facility avoids the need to simmer at a reduced power thus achieving reduced running costs when compared with conventional linear sources for photoprinting.
- the reference numeral 10 denotes generally a 800 watt sealed beam reflector lamp combination according to the present invention comprising a reflector 11 containing a metal halide quartz discharge arc tube 12.
- a prismatic lens 13 is sealed to the reflector 11 providing a front window and a dichroic layer 14 is formed on the rear inner surface of the reflector 11.
- the dichroic layer is selected to reflect UV rather than visible light.
- the discharge arc tube 12 is shown in more detail in Figure 2.
- the discharge arc tube 12 is disposed adjacent the focus of the reflector 11 and is carried on nickel alloy inner lead in members 15 and 16 joined to outer lead in members 17 and 18 formed of copper braid.
- a ceramic bridge member 19 maintains the electrically conducting pins 20 and 21 at the correct spacing. This is a standard G38 bi-pin construction providing a hot restart facility.
- the discharge arc tube 12 is shown in more detail. It is seen to comprise a quartz envelope 22 of approximately 10cc internal volume having a fill 23 selected from a mixture of iron iodide ( FeI 2 ), Gallium Tri iodide (GaI 3 ) and mercury (Hg). Tungsten electrode coils 24, 25 are carried on tungsten shanks 26, 27 which are joined respectively to inner molybdenum foils 28 and 29. Outer molybdenum lead-in members 30, 31 are also joined to the foils 28, 29 and hermetically sealed in the pinches 32, 33. A typical electrode length between the electrodes 24 and 25 would be 25 mm with an overall length over the pinch seals of 78 mm while the maximum envelope nominal diameter would be 26 mm. Such an arc tube 12 would then be suitable for a metal halide discharge lamp.
- a quartz envelope 22 of approximately 10cc internal volume having a fill 23 selected from a mixture of iron iodide ( FeI 2 ), Gallium Tri iodide (G
- FIG 3 there is shown a graph of a FeI 2 - GaI 3 -Hg system according to the invention which indicates a peak irradiance at the particular total iodide dose of 2.5mg FeI 2 + 0.5mg GaI 3 + 50mg Hg in an approximately 10cc volume arc tube.
- Other values of relative irradiance at different dosage rates are given in the following tables 1 and 2 where all values refer-to are tubes of approximately 10cc volume.
- lamps having arc tubes of approximately 10cc volume with a fill of 2.5mg FeI 2 plus 0.5mg GaI 3 and 65mg Hg instead of 50mg were tested and found to have an average irradiance of between 46.2 and 48.5 W/M 2 .
- fills suitable for approximately 10cc arc tubes comprise a) 0.5 to 0.55mg GaI 3 plus 2.45 to 2.65mg FeI 2 and 60 to 65mg Hg and b) 0.5mg GaI 3 plus 2.5mg FeI 2 and a quantity of mercury selected from between 50 to 65mg.
Landscapes
- Discharge Lamp (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8234089 | 1982-11-30 | ||
| GB8234089 | 1982-11-30 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0110645A2 true EP0110645A2 (de) | 1984-06-13 |
| EP0110645A3 EP0110645A3 (en) | 1985-05-29 |
| EP0110645B1 EP0110645B1 (de) | 1988-06-01 |
Family
ID=10534624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19830307089 Expired EP0110645B1 (de) | 1982-11-30 | 1983-11-21 | Photodrucklampen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0110645B1 (de) |
| DE (1) | DE3376922D1 (de) |
| DK (1) | DK548283A (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160242A1 (de) * | 1984-04-19 | 1985-11-06 | General Electric Company | Reflektorlampe und Beleuchtungssysteme, insbesondere zur effektvollen Beleuchtung von Bauten geeignet |
| DE3829156A1 (de) * | 1987-09-04 | 1989-03-16 | Philips Nv | Hochdruckgasentladungslampe und leuchte mit dieser lampe |
| GB2211985A (en) * | 1987-11-05 | 1989-07-12 | Emi Plc Thorn | Improvements in plant growth lamps |
| WO1997038275A1 (en) * | 1996-04-04 | 1997-10-16 | Gew (Ec) Limited | Uv dryer with improved reflector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2110663A5 (de) * | 1970-10-26 | 1972-06-02 | Aquitaine Total Organico | |
| FR2236269A1 (de) * | 1973-07-05 | 1975-01-31 | Thorn Electrical Ind Ltd | |
| DE2718527A1 (de) * | 1977-04-26 | 1978-11-09 | Patra Patent Treuhand | Spektrallampe zur erzeugung des eisenlinienspektrums |
| US4197480A (en) * | 1978-09-11 | 1980-04-08 | Westinghouse Electric Corp. | Reflector-type hid sodium vapor lamp unit with dichroic reflector |
-
1983
- 1983-11-21 DE DE8383307089T patent/DE3376922D1/de not_active Expired
- 1983-11-21 EP EP19830307089 patent/EP0110645B1/de not_active Expired
- 1983-11-30 DK DK548283A patent/DK548283A/da not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2110663A5 (de) * | 1970-10-26 | 1972-06-02 | Aquitaine Total Organico | |
| FR2236269A1 (de) * | 1973-07-05 | 1975-01-31 | Thorn Electrical Ind Ltd | |
| DE2718527A1 (de) * | 1977-04-26 | 1978-11-09 | Patra Patent Treuhand | Spektrallampe zur erzeugung des eisenlinienspektrums |
| US4197480A (en) * | 1978-09-11 | 1980-04-08 | Westinghouse Electric Corp. | Reflector-type hid sodium vapor lamp unit with dichroic reflector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160242A1 (de) * | 1984-04-19 | 1985-11-06 | General Electric Company | Reflektorlampe und Beleuchtungssysteme, insbesondere zur effektvollen Beleuchtung von Bauten geeignet |
| DE3829156A1 (de) * | 1987-09-04 | 1989-03-16 | Philips Nv | Hochdruckgasentladungslampe und leuchte mit dieser lampe |
| DE3829156C2 (de) * | 1987-09-04 | 2003-11-13 | Koninkl Philips Electronics Nv | Hochdruckgasentladungslampe und Leuchte mit dieser Lampe |
| GB2211985A (en) * | 1987-11-05 | 1989-07-12 | Emi Plc Thorn | Improvements in plant growth lamps |
| GB2211985B (en) * | 1987-11-05 | 1992-05-27 | Emi Plc Thorn | Improvements in plant growth lamps |
| WO1997038275A1 (en) * | 1996-04-04 | 1997-10-16 | Gew (Ec) Limited | Uv dryer with improved reflector |
Also Published As
| Publication number | Publication date |
|---|---|
| DK548283A (da) | 1984-05-31 |
| EP0110645B1 (de) | 1988-06-01 |
| EP0110645A3 (en) | 1985-05-29 |
| DK548283D0 (da) | 1983-11-30 |
| DE3376922D1 (en) | 1988-07-07 |
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