稀土元素有其一定的特征谱线,它们在可见区能够发射大量密集的线光谱,蓝、绿区域比红色区域丰富,光呈白色,光效、显色指数都比汞灯有所改善。实践证明,稀土碘化物加入到汞弧中去时,电弧会产生收缩,同时,灯的电位梯度和管压降升高。本文主要讨论稀土金属卤化物灯的光谱能量分布特征、熄弧分析及光电参数等方面的情况。 Rare earth elements have certain characteristic lines, they can emit a large number of dense line spectra in the visible region, blue and green regions are richer than the red region, the light is white, and the luminous efficiency and the color rendering index are better than the mercury lamps. Practice has proved that rare earth iodide added to the mercury arc, the arc will produce shrinkage, at the same time, the lamp potential gradient and tube pressure drop rise. This article focuses on the rare earth metal halide lamp spectral energy distribution characteristics, extinction analysis and photoelectric parameters and so on.