|anti-reflection coatings||S E||Dynasil, EKSMA OPTICS, Iridian Spectral Technologies, Knight Optical, Laseroptik, Shanghai Optics, VisiMax Technologies|
|dielectric coatings||S E||EKSMA OPTICS, Intrinsic Crystal Technology, Knight Optical, Laseroptik, Shanghai Optics, VisiMax Technologies|
|optical materials||S E||Covesion, Dynasil, Intrinsic Crystal Technology, Knight Optical|
|research and development||S||APIC, Optikexpertisen, RP Photonics|
Column "To": S = list of suppliers for that product, E = encyclopedia article.
Third column: alternative suppliers are suppliers also offering such products while having an ad package. On their own company profile pages, the right column of the table contains their product descriptions instead of alternative suppliers.