|anti-reflection coatings||S E||EKSMA OPTICS, Iridian Spectral Technologies, Laseroptik|
|dielectric coatings||S E||EKSMA OPTICS, Laseroptik|
|optical materials||S E|
|research and development||S||APIC, Optikexpertisen, RP Photonics|
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.