| 摘要 |
PURPOSE:To obtain the hollow light guide having excellent mechanical strength and heat conduction by integrating at least >=2 pieces of hollow pipes with the hollow light guide axially on the outer periphery of the hollow light guide which transmits light energy. CONSTITUTION:Al pipes 3, 4 having respectively 1.5mm outside diameter and 1.1m and 1.05m length are tightly adhered by Al foil 5 and are provided axially on the outer periphery of the Ni hollow light guide 2 which has 1.5mm inside diameter and 1.2m length and contains Ge 1. The apertures at both ends of the Al pipes 3, 4 and the lower apertures of the hollow light guide 2 are hermetically closed by sealing tapes 6. This assembly is immersed in a watt bath 7 kept at 45 deg.C and is energized with an Ni electrode 8 by 4A/dm<2> density for 4 hours to form an Ni plating layer of a sufficient thickness. The sealing tapes 6 are then peeled and the assembly is immersed in a caustic soda to etch away the the Al pipes 3, 4. The hollow light guide integrated with the Ni hollow pipes usable as water cooling pipes on the outer periphery of the hollow light guide 2 made of the Ni contg. the Ge is formed. The hollow light guide having the good mechanical strength and heat conductivity is thereby obtd. |
