GAS DISCHARGE TUBE

• Main Authors: IKEDO TOMOYUKI, ITO YOSHINOBU, MATSUI RYOTARO
• Format: Patent
• Language: English
• Published: 30.08.1996
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; COLORIMETRY; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

PURPOSE: To improve the stability of the operation of a gas discharge tube and prolong its life by bringing spacers into contact with the back face of a focusing electrode support member and the front face of an anode section, pressing the anode section to the front face of an anode support member, and keeping the interval between a focusing electrode section and the anode section. CONSTITUTION: Spacers 50 are arranged between the back face 21b of a focusing electrode support member 21 and an anode fixing plate 24b on both sides in an anode storage recess 25. The back face 24aA of an anode fixing plate 24a is pressed and fixed to the surface 25a of the anode storage recess 25 by the pressing force of the spacers 50. The interval between a focusing electrode section 29 and an anode section 24 can be invariably kept constant by the spacers 50. The trigger voltage of 350-500V, for example, is applied between a hot cathode 31 and the anode section 24. The thermoelectrons emitted from the hot cathode 31 discharge ultraviolet rays from an opening window 30 via an arc discharge. Since the anode section 24 is firmly held by an anode support member 22 and a focusing electrode section 29 is held by the focusing electrode support member 21, they are not deformed at the high temperature caused by continuous luminescence over a long period.