A metal halide lamp by using both gallium and ferric iodides

摘要

References(3) Metal halide lamps with gallium iodide additive are widely used in the field of photoengraving and photocopy applications. The auther has developed a new type of metal halide lamp which has an improved energy distribution by using both gallium and ferric iodides as additives. Using a specific additive composition, the improved lamp has a desirable spectral energy ballance, which brings the maximum light output in the spectral range between 360 and 420 nm. This lamp has a tubular shape and is installed in a lamp house with a shutter unit and a cooling fan. The improved metal halides lamp offers a wide range of applications for photoengraving using diazo type photosensitizers and also photo etching using dichromic and non-chromic type photosensitizers. The lamp has further applications for curing photochemical resins and exposing Bright Light Contact Film and RL Film.