Hamamatsu Photonics K.K. manufactures and sells photomultiplier tubes, imaging devices, light sources, opto-semiconductors, and imaging and analyzing systems in Japan and internationally. It operates through three segments: Electron Tube, Opto-Semiconductor, and Imaging and Measurement Instruments. The company offers optical sensors including photodiodes, avalanche photodiodes, photo IC, MPPCs/SPADs, photomultiplier tubes, phototubes, and infrared detectors, as well as spectrometers / spectrum, UV and flame, image, X-ray, radiation, electron and ion, and distance and position sensors. It also provides optical components, such as optical blocks, fiber optic plates, FAC lenses, collimating capillary lenses, capillary plates, flow cells, optical phase modulator, image splitting optics, MEMS mirrors, SERS substrates, ionization-assisting substrates DIUTHAME, and terahertz wave plate. In addition, the company offers cameras, board level cameras, and X-ray cameras, as well as imaging software; light and radiation sources, such as LEDs, lamps, lamp modules and units, UV-LED light, excimer lamp light, microfocus X-ray, soft X-ray, extreme ultraviolet, laser-driven tunable light, and laser-driven light sources; and semiconductor lasers and related products, solid state lasers, and laser-related products. Further, it is involved in the hotel operation businesses. The company was formerly known as Hamamatsu TV Co., Ltd. Hamamatsu Photonics K.K. was incorporated in 1953 and is headquartered in Hamamatsu, Japan.