发明名称 |
Infrared radiation emitter |
摘要 |
An emitting source capable of radiating substantial energy in the near infrared spectrum and suitable for use in non-dispersive infrared gas analyzers or other devices is described. Operation can be steady state (DC) or pulsed at high frequency with excellent modulation characteristics. The device consists of a tungsten filament mounted across the pins of a small transistor outline header and centered at the focal point of a parabolic or other shaped reflector. The header assembly is enclosed by a resistance-welded cap and window assembly having a specially sealed sapphire or other suitable IR transmissive window. Fundamental to the operation of the inventive IR emitter is the incorporation of a getter within the header package configured to prevent oxidation degradation of the tungsten filament. An inert gas backfill limits filament evaporation and further extends apparatus lifetime. |
申请公布号 |
US7122815(B2) |
申请公布日期 |
2006.10.17 |
申请号 |
US20040857140 |
申请日期 |
2004.05.27 |
申请人 |
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发明人 |
WOOD DONALD S. |
分类号 |
A61N5/06;G01J1/08;G01N21/35;H01K1/18;H01K1/26;H01K1/28;H01K1/50;H01K1/54;H01K7/00 |
主分类号 |
A61N5/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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