Klaus Wakonig (left) and Ana Diaz, together with other PSI researchers, have transferred the principle of Fourier ptychography to X-ray microscopy for the first time. (Courtesy: Paul Scherrer ...

This research aims to realize a service to convey haptic information that is hard to represent by video and sound, such as the hardness or texture of an object. As part of it, we developed a haptic ...

“Ghost imaging” generates images by analysing correlations between two light beams, the more powerful of which doesn’t bounce off the object in question. The technique has already been demonstrated at ...

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object through ...

pt. I. Geometrical optics. Light rays -- Plane surfaces -- Spherical surfaces -- Thin lenses -- Thick lenses -- Spherical mirrors -- The effects of stops -- Ray ...