Single Coating (MgF2)

Transmission dependent on wavelength, substrate's index of refraction, thickness of the coating, and angle of the incident light
Coating is designed so the relative phase shift between beam reflected from upper and lower surface destructively interfere (cancel)
Optical thickness must be ODD NUMBER OF (/4) where is the wavelength being optimized. (gives ½  path difference)
(Discussion from www.edmundoptics.com/TechSupport/)

Transmission dependent on wavelength, substrate's index of refraction, thickness of the coating, and angle of the incident light