Peering into Tight Spots: A Fiber Thinner Than a Hair
Light passing through a thin glass fiber scatters into countless tiny speckles, like ripples on water from a thrown stone. Physicists call this graininess speckle noise. Because of it, images from an ultra-thin endoscope come out blurry, as if you're looking through fogged-up glass.
The researchers devised a program that removes this ripple.