DIVISIONAL REVIEWElectron Tube Division (Electron Tube Segment)For over 60 years, Hamamatsu Photonics has developed and manufactured photomultiplier tubes (PMT). This technology continues to evolve today at the Electron Tube Division, one of the company’s primary manufacturing divisions. The Electron Tube Division also develops and manufactures a variety of products for use in medical applications, chemical analysis, measurement, industrial testing, and academic research. These products include PMT, electron multipliers, microchannel plates, image intensiers, X-ray products, and a wide variety of light sources. In scal year 2017, sales of these products accounted for 37.4% of net sales.Sales of PMTSales of PMT increased in the medical eld for inspection and monitoring systems such as blood analyzers, particularly in overseas markets, where these products enjoy a favorable reputation for highly sensitive, low-noise, high-speed operations. In addition, in the measuring instrument eld, sales for oil-well logging devices that offer superior ruggedness to withstand against harsh work conditions such as high temperatures, shocks, and vibrations were higher. Further, sales for academic applications such as high-energy physics experiments also increased. As a result, sales of PMT increased.Sales of imaging devices and light sourcesIn imaging devices and light sources, sales in the industrial eld of microfocus X-ray sources for non-destructive testing were brisk, primarily in overseas markets. Sales in the medical eld of scintillators for converting X-rays into visible light increased. Further, sales of deuterium lamps for environmental analysis also were brisk. Net sales of imaging devices and light sources grew as a result.In total, the Electron Tube business comprised of PMT and imaging devices and light sources closed the scal year 2017 with net sales of JPY 48,744 million, up by 6.9% from the previous year.PMT for inspection and monitoring systemsX-ray scintillator6


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