What is the difference between single-layer and multi-layer antireflection?
I know that the multi-one is better, but I just do not know the details.
Antireflection coatings are properly named. They literally help to
optimize the percentage of light that is transmitted from the air into the
glass of the optics that the coating is on. To fully understand the reason
why multi-layer coatings are higher quality than single-layer you should
visit our site:
Referring to my explanation using Z (impedances): The use of one layer (or
single layer coating ) would provide very good anti-reflection at one
wavelength. Two coatings would have good anti-reflection at two wavelengths
and so on. The more levels of coatings (or as electrical engineers call
them impedance matching stages) the broader range of wavelengths will enjoy
the lower reflections. This is important since the visible light spectrum
is not just one wavelength.
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Update: June 2012