| 摘要 |
PURPOSE:To reduce the amount of a quartz plate used, and simplify the manufacture of a light source lamp by forming a transparent discharge window provided at the end of the tube axis of a glass case, in which an emission source having a hollow cathode is installed, by fixing the quartz plate to the opening of the glass case by means of an adhesive. CONSTITUTION:An emission source consisting of a hollow cathode 3 and an anode 5 is installed in a case 1 made of borosilicate glass, and the case 1 is charged with a rare gas at several Torrs. At the same time, an opening 11a is perforated in the center of a flat front wall 1, and a quartz plate 2 is fixed to the wall 11 from outside the opening 11a so as to make a transparent discharge window, thereby making a hollow cathode lamp. In fixing the quartz plate 2, a thermosetting epoxy resin is used as an adhesive, and gas contained in the adhesive is completely expelled after the fixation so as to enable a light source lamp to be assembled airtight. By the means mentioned above, the amout of the expensive quartz plate 2 can be reduced, manufacture of the lamp can be extremely simplified, and its cost can be reduced. |
