Interview and article by Ryosuke KobayashiEdited by Takashi MinakamiRion’s Technologies Over the YearsHalogen lamps produce stable light output through the halogen cycle, which involves heating a tungsten filament within an enclosed gas and causing redeposition of the evaporated tungsten onto the inner wall of the incandescent tube. In the past, halogen lamps, which were capable of producing a wide optical beam, were used in particle counters to uniformly irradiate the entire irradiation region.KC-10 Released in 1984Light source: Halogen lamp (for coarse particle counting)SlitPhotomultiplierSample intakeKC-13 Released in 1981Particle detector unit: KA-13 Control and display unit: KE-13Light source: Halogen lampOne of the pillars of the Rion product categories is the particle counter. Airborne particle counters, devices that measure fine particles in the air, are essential instruments in cutting-edge industries, like the semiconductor and electronic component industries. Here we’ll explore the history of airborne particle counters developed through Rion’s sustained and unique innovations.6HISTORY OF TECHNOLOGYAirborne Particle CountersHalogen lamp light sourceHeading into the Future with the Evolution of Light SourcesPart 9
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