STABILIZING DEVICE FOR HID LAMP LIGHT OUTPUT
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专利名称：STABILIZING DEVICE FOR HID LAMP LIGHT OUT PUT
发明人：MIYASHITA HISASHI,YASUDA M19870612 公开号：JPS63309827A 公开日：19881216
摘要：PURPOSE:To obtain a high-level, stable device by producing a magnetic field which operates on the arc of a HID lamp (high-pressure vapor discharge lamp), detecting the position shift of the arc, and producing a magnetic field with its output signal and correcting the arc position. CONSTITUTION:The light output of the HID lamp 1 is converged and image- formed on the entrance slit of a spectrophotometer 6. Time fluctuations of the light output of the lamp 1 which affect the intensity of the incident light is corrected by a method of turning on the lamp 1 by a constant current circuit, etc. For fluctuations based upon the variation of the lamp 1 which affect the intensity of the incident light, a magnetic field produced by supplying a current to a coil 4 provided nearby the lamp 1 displaces the arm with its Lorentz force. Then the arc is fixed at a desired position under the control of an arc position detector 2 and a magnetic field control circuit 3. Thus, the arc suppresses the position shift of fluctuations, etc., due to a snake or convection in the discharge tube and, therefore, suppresses the fluctuations of the light output.
申请人：HITACHI LTD
更多信息请下载全文后查看
专利名称：STABILIZING DEVICE FOR HID LAMP LIGHT OUT PUT
发明人：MIYASHITA HISASHI,YASUDA M19870612 公开号：JPS63309827A 公开日：19881216
摘要：PURPOSE:To obtain a high-level, stable device by producing a magnetic field which operates on the arc of a HID lamp (high-pressure vapor discharge lamp), detecting the position shift of the arc, and producing a magnetic field with its output signal and correcting the arc position. CONSTITUTION:The light output of the HID lamp 1 is converged and image- formed on the entrance slit of a spectrophotometer 6. Time fluctuations of the light output of the lamp 1 which affect the intensity of the incident light is corrected by a method of turning on the lamp 1 by a constant current circuit, etc. For fluctuations based upon the variation of the lamp 1 which affect the intensity of the incident light, a magnetic field produced by supplying a current to a coil 4 provided nearby the lamp 1 displaces the arm with its Lorentz force. Then the arc is fixed at a desired position under the control of an arc position detector 2 and a magnetic field control circuit 3. Thus, the arc suppresses the position shift of fluctuations, etc., due to a snake or convection in the discharge tube and, therefore, suppresses the fluctuations of the light output.
申请人：HITACHI LTD
更多信息请下载全文后查看