JPS556727A - Metal vapor discharge lamp - Google Patents
Metal vapor discharge lampInfo
- Publication number
- JPS556727A JPS556727A JP7949278A JP7949278A JPS556727A JP S556727 A JPS556727 A JP S556727A JP 7949278 A JP7949278 A JP 7949278A JP 7949278 A JP7949278 A JP 7949278A JP S556727 A JPS556727 A JP S556727A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- starting voltage
- luminous tube
- arc
- discharge lamp
- 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.)
- Pending
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
PURPOSE: To reduce the starting voltage by making the average unevenness of the inner surface of the luminous tube Ra 0.4μ or less to move arc smoothly.
CONSTITUTION: 10 mg of sodium and 30 mg of mercury are sealed in the luminous tube 3 made of metal oxide of single crystal or of polycrystal, xenon of 100 Torr up to 150 Trr is also sealed as a starting gas, and the average unevenness of the inner surface of luminous tube is made Ra 0.4μ or less. when a starting voltage is applied across the electrodes 10, 11, discharges are started across the electrodes and the inner surface in the neighborhood of these electrodes, one end of arc moves to the central part along the inside of tube. The movement status of arc is influenced by the unevenness of inner surface. When the inner surface is made smooth, the movement of becomes smooth too, resulting in a drop of starting voltage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7949278A JPS556727A (en) | 1978-06-30 | 1978-06-30 | Metal vapor discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7949278A JPS556727A (en) | 1978-06-30 | 1978-06-30 | Metal vapor discharge lamp |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14374285A Division JPS6129060A (en) | 1985-06-29 | 1985-06-29 | Metal vapor discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS556727A true JPS556727A (en) | 1980-01-18 |
Family
ID=13691392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7949278A Pending JPS556727A (en) | 1978-06-30 | 1978-06-30 | Metal vapor discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS556727A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184450A (en) * | 1983-04-01 | 1984-10-19 | Toshiba Ceramics Co Ltd | Light-transmitting alumina tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133207A (en) * | 1974-03-22 | 1975-10-22 |
-
1978
- 1978-06-30 JP JP7949278A patent/JPS556727A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133207A (en) * | 1974-03-22 | 1975-10-22 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184450A (en) * | 1983-04-01 | 1984-10-19 | Toshiba Ceramics Co Ltd | Light-transmitting alumina tube |
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