Optical Glass - Ohara Corporation Optical Glass, Glass Ceramics, Measurement Services, Polished Substrates, Clear Ceram-Z, Corning, custom made optics, engineering optics, raw glass, fused quartz, fused silica, glass blanks, glass, glass ceramics, glass discs, glass disks, glass measurement services, glass pressings, glass-ceramics, homogeneity glass, ohara, optical flats, optical glass, optical glass blanks, optical glass cut discs, optical glass manufacturers, optical glass pressings, optical glass rectangles, optical polishing , optical rods, optical substrates, optics, substrates, polished discs, polished faces, polished glass substrates, polished wafers, pressings, quartz Cover Slips, quartz substrates, refractive index measurement, refractive indices measurement, Schott, UV fused, zero expansion glass Leading manufacturer of precision optical glass, glass ceramics, and polished substrates for over 70 years.