Ohara Inc. manufactures and sells glass materials for optical and electronics applications in Japan and internationally. It offers optical glass/eco-optical glass, low Tg optical glasses for glass mold lens, and high transmission and low photoelastic constant glass; and electronics products, such as ultra low expansion glass-ceramics, glass-ceramic substrate for DWDM thin-film filters, glass disk for magnetic head flying height testers, lithium-ion conductive glass-ceramics, fiber glasses for light guide, i-line high homogeneity glass, glass for art, measurement service on glasses/ceramics, and quartz glass. The company also provides measurement and analysis services on characteristics of optical materials. Ohara Inc. was founded in 1935 and is headquartered in Sagamihara-Shi, Japan.