Retroreflector
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A retroreflector is a device or surface that reflects light or other radiation back to its source with minimum scattering. This works at a wide range of angle of incidence, unlike a planar mirror, whi
A gold corner-cube retroreflector (made with three orthogonally joined flat mirrors)
Eyeshine from retroreflectors of the transparent sphere type is clearly visible in this cat's eyes.
"Aura" around the shadow of a hot-air balloon, caused by retroreflection from dewdrops
Car with reflective stickers
Tapetum lucidum
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The tapetum lucidum is a layer of tissue in the eye of many vertebrates and some other animals. Lying immediately behind the retina, it is a retroreflector. It reflects visible light back through the
Retroreflector
…eye derives from the resemblance of the cat's eye retroreflector to the optical system that produces the well-known phenomenon of "glowing eyes" or eyeshine in cats and other vertebrates (which are only reflecting light, rather than actually glowing). The combination of the eye's lens and the cornea form…
The dark blue, teal, and gold tapetum lucidum from the eye of a cow
Choroid dissected from a calf's eye, tapetum lucidum appearing iridescent blue
Reflection of camera flash from the tapetum lucidum
A three-month-old black Labrador puppy with apparent eyeshine