Metal halide lamp used for both of vehicle headlight and infrared night imaging vision equipment, and metal halide lamp lighting apparatus

摘要

A metal halide lamp used for both of a vehicle headlight and an infrared night imaging vision apparatus, comprises a refractory and light-transmitting hermetic vessel, a pair of electrodes sealed in the hermetic vessel, and a discharge medium sealed in the hermetic vessel. The discharge medium contains a first halide containing at least one of sodium, scandium and a rare earth metal, a second halide which is a halide of a metal which emits light mainly in a near-infrared region of a wavelength of 780 to 800 nm, and a gas which emits light mainly in a near-infrared region of a wavelength of 820 to 1000 nm, and does not substantially contain mercury.