ARC TUBE MANUFACTURING METHOD AND DISCHARGE LAMP

摘要

PROBLEM TO BE SOLVED: To manufacture an arc tube having a high quality and high pressure resistance at a low cost with a high productivity. SOLUTION: The arrangement to manufacture the arc tube 1 includes a light emission part 2 equipped internally with an electrode 6 and a seal part 3 formed at the end of the light emission part 2, in which an electrode body 11 having the electrode 6 is inserted into parts 13a and 13b where seals are planned to be formed adjoining to the part 15 where the light emission part is planned to be formed of a photo-transmitting insulating tube 9 as a work for the arc tube 1, and then the parts 13a and 13b are heated and softened by using together a laser beam 17 and a gas burner 21 so that sealing of the place is generated, and thus the seal part 3 is accomplished. Heat source to be used may be different to different regions of the parts 13a and 13b, and thereby the intended arc tube having a high quality and high pressure resistance can be manufactured at a low cost with a high productivity.