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The phenomenon where a portion of incident light is reflected or scattered at the interface between two media (e.g., air and glass). This is often undesirable in optics, creating glare.
read more about surface reflection ...For clear, transparent materials like glass, the amount of light reflected at the surface is governed by the Fresnel equations and depends on the angle of incidence and the refractive index difference.
High-quality spectacle lenses are treated with Anti-Reflective (AR) coatings, which use thin-film interference to minimize surface reflection and maximize light transmission.
Surface reflections from the front and back of spectacle lenses are a major cause of visual glare and "ghost images" for the wearer, especially when driving at night.
The residual reflection from an AR coating is usually a faint green or purple color, which is the specific wavelength that the coating is least effective at canceling out.
A standard glass lens with no coating reflects approximately 4% to 5% of light from each surface at a normal angle of incidence.
Reflection is the organized return of light. Scatter is the return of light in multiple, disorganized directions, often due to micro-roughness on the surface.