发明授权
- 专利标题： Circuit arrangement for detecting the amount of deposited electrode material on the wall of a lamp vessel
- 专利标题（中）： 用于检测在灯管壁上沉积的电极材料的量的电路装置
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申请号： US583687申请日： 1996-01-05
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公开(公告)号： US5689156A公开(公告)日： 1997-11-18
- 发明人: Gunther H. Derra , Hanns E. Fischer , Hans G. Ganser , Holger Monch
- 申请人： Gunther H. Derra , Hanns E. Fischer , Hans G. Ganser , Holger Monch
- 申请人地址： NY New York
- 专利权人： U.S. Philips Corporation
- 当前专利权人： U.S. Philips Corporation
- 当前专利权人地址： NY New York
- 优先权： EPX95200030.5 19950109
- 主分类号： G01N21/01
- IPC分类号： G01N21/01 ; G01J1/00 ; H01J7/42 ; H01J9/42 ; H01J61/00 ; H01J61/56 ; H05B37/00
摘要：
The invention relates to a measuring circuit for detecting the amount of deposited electrode material on the wall of a lamp vessel of a discharge lamp by measuring the power of infrared radiation within a specific wavelength range, comprising a detector for generating an electrical signal constituting a measure for the power of the infrared light in said specific wave length range. According to the invention the measuring is done in a time lapse starting after a predetermined time interval following the extinguishing of the discharge lamp. An increased accuracy of the measurement is thereby realized.
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