When there is a coating between glass and air, some incident light is transmitted and reflected at the coating/glass interface while some light is reflected at the air/coating interface. The thickness of the coating allows light to reflect from the coating/glass interface twice as far. The light reflected from the coating/glass interface is offset by half a wavelength from the light reflected at the air/coating interface when the optical thickness of the coating is equal to a multiple of the wavelength plus a quarter wavelength ((m +14)), where m is a whole number. As a result, the Anti-Reflective Coatings Market is reduced and these light rays cancel each other out thanks to the destructive interference effect. The main goal of this work is to provide a thorough understanding of ARCs from the moment they were first imagined by the pioneers and to lay out the fundamental ideas and approaches used to reduce reflectance.
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