Definition of retroreflectivity

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Photonics Dictionary

retroreflectivity: Retroreflectivity refers to the property of a surface or material to reflect light back to its source, regardless of the angle of incidence. Unlike most surfaces that scatter light in various directions, retroreflective surfaces redirect incident light rays back towards the light source, resulting in high visibility.

The phenomenon of retroreflection is achieved through the use of specialized materials or structures, such as retroreflective tapes, coatings, or optical elements. These materials typically contain small microstructures, such as corner-cube prisms or microbeads, that redirect incident light rays back towards their source.

Retroreflective materials are commonly used in applications where visibility and safety are paramount, such as road signs, traffic markings, safety apparel, bicycle reflectors, and vehicle license plates. By enhancing visibility, retroreflective materials help improve safety and reduce the risk of accidents, especially in low-light conditions or situations with reduced visibility.

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