Barr Associates is the world's largest independent manufacturer of precision thin film coatings and optical filters.

Medway Optics, dedicated to the supply of high precision high quality products in the optics, infrared spectroscopy and microscopy markets

Importec is able to supply: any kind of optical components (windows, mirrors, lenses, prisms, ...); any kind of optical filters (colour glass filters, dichroics ...

Asahi Spectra supplies high-end optical filters and instruments for biomedical, fluorescence, solar cells, FPD inspection, lithography and astronomy.

Panel Graphic Ltd. Norfolk, England. Protective and contrast enhancement front windows/screens, filters and materials for electronic information displays ...