CN201681789U - Metallic cathode for continuous krypton lamp - Google Patents
Metallic cathode for continuous krypton lamp Download PDFInfo
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- CN201681789U CN201681789U CN2010202975376U CN201020297537U CN201681789U CN 201681789 U CN201681789 U CN 201681789U CN 2010202975376 U CN2010202975376 U CN 2010202975376U CN 201020297537 U CN201020297537 U CN 201020297537U CN 201681789 U CN201681789 U CN 201681789U
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Abstract
The utility model belongs to the technical field of light sources, in particular to a metallic cathode for a continuous krypton lamp. The utility model is mainly characterized in that the cathode is formed by connecting three parts: a discharge point, a connecting rod and an electrode rear end in sequence end to end by adopting tungsten alloy materials, wherein the head of the discharge point is designed to be a tapered point shape, and the electrode rear end is designed into a cylindrical shape the dimension of which is matched with a discharge tube. The cathode has the characteristics of high melting point, high temperature resistance, good electron emission performance, high current resistance, easy starting enablement and the like, and the krypton lamp provided with the electrode has the advantages of strong radiation power, stable radiation spectrum, long light source life and the like.
Description
Technical field
The utility model belongs to light sources technical field, is specifically related to a kind of continuous krypton lamp metallic cathode, refers in particular to a kind of tungsten alloy discharge negative electrode that adopts three stage structure, and this metallic cathode is disposed in the continuous krypton lamp light source in order to the solid laser pumping light source.
Background technology
Along with fast development of national economy, laser technology is widely applied in the daily productive life fast.At multiple uses such as fields such as automobile, medical treatment, beauty treatment such as mark, engraving, cutting, punching, welding, defeathering, skin moistens.Determine that a very important core of efficiency of laser height is exactly a pump light source, and pump light source is assessed by pumping efficiency, stability and life-span three indexs mainly.
The YAG laser is present domestic main solid state laser, and its activated material is Nd.YAG (yag crystal), but excitation pulse laser or continous way laser.The pump light source that Nd.YAG activated material crystal uses is generally krypton lamp or xenon lamp, because the pumping lamp emission spectrum is the broadband continuous spectrum, and the absorption bands of Nd.YAG is only near the long wave near-infrared, the part spectrum peak is only arranged by the Nd ionic absorption, so most of energy is usually with heat-energy losses, the pumping lamp transformation efficiency is generally not high.
Because transformation efficiency is difficult to improve, pumping lamp just needs very big radiant power to satisfy the laser operate as normal, because krypton lamp spectrum and YAG laser crystal absorption band mate the most, the efficiency of light energy utilization is higher relatively, so domestic main YAG solid state laser all still adopts the pump light source of high pressure krypton lamp as laser at present.
Summary of the invention
The metallic cathode that provides a kind of high power CW krypton lamp to use is provided the utility model purpose.
The metallic cathode that the utility model provides is joined end to end successively by discharge tip, connecting rod and electrode rear end three parts and to form.Wherein, the discharge tip head design is the cone point shape, easily forms density peak value at most advanced and sophisticated position, helps at electronics emission and formation stable discharging; The electrode back end design is cylindrical with the discharge tube size match, the sealing-in of convenient and discharge tube.
In the utility model, the diameter of connecting rod and the design of length are related to the discharge capability and the capacity of heat transmission of the negative electrode that discharges, and its effect mainly is that low-density big electric current is converted into highdensity big current delivery to the electrode discharge end.In the transmission course of electricity and heat, all played the effect of buffering, with being beneficial to the stable discharging process.If discharge tip length is L1, the discharge tip maximum gauge is D1, and connecting rod length is L2, and the connecting rod diameter is D2, and the electrode total length is L3, and the electrode maximum gauge is D3, and various piece is according to certain dimension scale adjustment, to reach optimum efficiency.Particularly, D1 can select in 2mm to 5mm scope, and D2 can select in 1mm-2mm scope, and D3 can select in 2mm-5mm scope,, L1 can select in 5mm-7mm scope, and L2 can select in 5mm-8mm scope, and L3 can select in 16mm-22mm scope.
Metallic cathode of the present utility model adopts tungsten alloy material as metal electrode material, has high rigidity, dystectic characteristics, high temperature resistant and not perishable sex change.Material has the low work function characteristic simultaneously, and electron emissivity is strong, can bear high voltage, big current trigger, and evoked potential is low than ordinary electrode.
Most advanced and sophisticated position easily forms density peak value, helps at electronics emission and formation stable discharging.The electrode back end design helps reducing the temperature of rear end sealing-in transition material molybdenum foil, prolongs the useful life of lamp, improves the reliability of lamp.
Syllogic design of the present utility model is for the Control current transmission, and forming stable discharging has important effect.By control and the change to current density, the discharge that not only can taper off to a point easily, and be easier to control heat energy distribution avoids sealing-in place temperature in electrode rear end too high and influence useful life.By simple syllogic Cathode Design, solved the stability and the life problems of high capacity, high power CW krypton lamp scientifically and rationally, improve reliability and cost performance greatly.
The utlity model has low work function, high rigidity, high-melting-point lamp characteristics, the characteristic of easily triggering, anti-big electric current, high capacity has improved pumping efficiency, stability and the life-span of continuous krypton lamp as pump light source greatly.
Description of drawings
Fig. 1 is this metal cathode construction schematic diagram.
Fig. 2 is this metal negative electrode pictorial diagram.
Number in the figure: L1 is a discharge tip length, and D1 is the discharge tip maximum gauge, and L2 is a connecting rod length, and D2 is the connecting rod diameter, and L3 is the electrode total length, and D3 is the electrode maximum gauge.
Embodiment
Metallic cathode of the present utility model, can adapted at the discharge negative electrode of solid laser pumping light source krypton lamp fluorescent tube.
Continuous krypton lamp of the present utility model adopts the tungsten alloy manufacturing of low work function, high-melting-point, high rigidity with metallic cathode; Adopt the design of syllogic cathode construction simultaneously, promptly join end to end successively and form by discharge tip, connecting rod and electrode rear end three parts.Wherein, the discharge tip head design is the cone point shape, easily forms density peak value at most advanced and sophisticated position, helps at electronics emission and formation stable discharging; The electrode back end design is cylindrical with the discharge tube size match, the sealing-in of convenient and discharge tube.
Wherein: electrode size is preferably as follows 2 example (units: mm) shown in the table
| ? | L1 | L2 | L3 | D1 | D2 | D3 |
| 1 | 6.5 | 7.5 | 19.2 | 5 | 1.5 | 5 |
| 2 | 6 | 7 | 19.2 | 4 | 1.5 | 4 |
Above size is only as 2 examples, and in actual applications, D1 can select in 2mm to 5mm scope, and L3 can select in 16mm to 22mm scope, and all the other sizes are optimized on year-on-year basis and can be got by D1 and L3 size.
That the utility model simply and has scientifically solved is high-power, the stability and the life problems of high capacity continuous krypton lamp, has improved the pumping efficiency of adapted laser optical pumping.
Fig. 2 has provided two kinds of optimum details sizes of discharge negative electrode, those skilled in the art will be appreciated that, this size is just in order to illustrate content of the present utility model, and be not to be qualification of the present utility model, as long as in connotation scope of the present utility model, change in size, the modification of above-mentioned negative electrode all dropped in claims scope of the present utility model.
Claims (3)
1. a continuous krypton lamp metallic cathode is characterized in that being joined end to end successively and being formed by discharge tip, connecting rod, electrode rear end three parts, and wherein the discharge tip head design is the cone point shape, and the electrode back end design is cylindrical with the discharge tube size match.
2. metallic cathode as claimed in claim 1 is characterized in that adopting tungsten alloy material.
3. metallic cathode as claimed in claim 1, it is characterized in that establishing discharge tip length is L1, the discharge tip maximum gauge is D1, connecting rod length is L2, and the connecting rod diameter is D2, and the electrode total length is L3, the electrode maximum gauge is D3, then D1 selects in the 2mm-5mm scope, and D2 selects in 1mm-2mm scope, and D3 selects in 2mm-5mm scope, L1 selects in 5mm-7mm scope, and L2 selects in 5mm-8mm scope, and L3 selects in 16mm-22mm scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202975376U CN201681789U (en) | 2010-08-19 | 2010-08-19 | Metallic cathode for continuous krypton lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202975376U CN201681789U (en) | 2010-08-19 | 2010-08-19 | Metallic cathode for continuous krypton lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681789U true CN201681789U (en) | 2010-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202975376U Expired - Fee Related CN201681789U (en) | 2010-08-19 | 2010-08-19 | Metallic cathode for continuous krypton lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681789U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882556A (en) * | 2010-08-05 | 2010-11-10 | 上海大愚光源科技有限公司 | Metal cathode for continuous krypton lamp |
-
2010
- 2010-08-19 CN CN2010202975376U patent/CN201681789U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882556A (en) * | 2010-08-05 | 2010-11-10 | 上海大愚光源科技有限公司 | Metal cathode for continuous krypton lamp |
| CN101882556B (en) * | 2010-08-05 | 2012-01-11 | 上海大愚光源科技有限公司 | Metal cathode for continuous krypton lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20150819 |
|
| EXPY | Termination of patent right or utility model |