The Groups Specialty Glass business operates in niche markets, in which the Group occupies leading positions in market share and technological superiority. The NSG Group is a pioneer in the field of micro-optics, researc......The Groups Specialty Glass business operates in niche markets, in which the Group occupies leading positions in market share and technological superiority. The NSG Group is a pioneer in the field of micro-optics, researching, developing and manufacturing a variety of optoelectronic products. Glass fiber has become a high-profile, high-tech material in a variety of fields: it is light and strong, fire retardant, non-conductive and resistant to chemicals.