Light is reflected at both interfaces of an AR coating. The two reflected wave trains of a certain wavelength can cancel each other out totally by interference if both the phase and amplitude requirements are met.
The reflected images and haze are superimposed on the direct image. They reduce contrast and can even falsify the information content of the perceived image. They are particularly irritating when the wearer is driving at night or on a wet road.
The technique for the production of antireflective coatings on lenses which forms the basis of the standard procedures used today, was patented by Carl Zeiss in 1936.
The quality of coatings on eyeglass lenses has now attained a very high standard.
Exact matching of the thickness of the AR coating layers and a precisely defined temperature profile during vacuum deposition guarantee the constant quality and reproducibility of ZEISS coatings.