| 摘要 |
PURPOSE:To stabilize operation by a method wherein a discharge vessel and an induction coil constituting an electrodeless discharge lamp are mounted on a lamp unit so that they are longitudinally movable while a plate body comprising a metallic conductor which longitudinally moves interlockingly with the above components is provided closely to the coil so that a distance between the coil and the plate body is constant irrespective of the lamp position. CONSTITUTION:A translucent discharge vessel 2 with discharge gas sealed and an induction coil 3 wound around its outer periphery comprise an electrodeless discharge lamp 1, which is fixed with adhesive 5 to a plate body 4 made of a metallic conductor. The plate body 4 is mounted on a lamp unit 7 so that it can be moved longitudinally via a vertical position adjusting means 6 comprising a rack, a pinion, etc., while the plate body 4 provided below the coil 3 is moved longitudinally interlocked with longitudinal motion of the lamp 1. This therefore allows position adjustment of the lamp 1 without changing relative distance of the lamp 1 and the coil 3 with respect to the plate body 4, stabilizing output in the lamp unit 6 and an installed high frequency oscillation circuit 8 to supply it to the coil 3. |
