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首页> 美国政府科技报告 >Optical Radiation Measurements: High Pressure Sodium Discharge Lamp Characterization for Use as Standards of Geometrically Total Luminous Flux
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Optical Radiation Measurements: High Pressure Sodium Discharge Lamp Characterization for Use as Standards of Geometrically Total Luminous Flux

机译：光辐射测量：高压钠放电灯表征用作几何总光通量的标准

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The stability of commercial 400W high pressure sodium lamps has been studied to allow the selection of lamps that produce a stable luminous flux on relighting. The properties of the lamps have been studied during the first minutes of starting, their output on relighting in place, and their output after 100's of hours burning. Lamps have been selected that repeat + or - 1% on relighting, and are expected to remain that stable over a life of about 4500 hours. The lamps have been calibrated for total luminous flux by sphere comparison, with an uncertainty of + or - 4.6%. These lamps will be used as working standards, and goniometric measurements will be made to reduce the uncertainty.

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