Shack-Hartmann wavefront sensor-based metrology device for optical surface flatness measurements

Transmitted Wavefront Error Metrology | High Precision | ZYGO

New sensor tackles high-curvature wavefront measurement challenges | Newswise

Do you know how a wave can pass an object as if the object was barely there?An invisibility cloak does not erase the object. It changes how the field moves around it. In this scene, the bare circular core first scatters the incoming wave and leaves a visible wake behind it. Then the surrounding graded shell redirects the field around the hidden region, reducing the shadow and letting the wavefront rebuild on the other side.Possible uses include stealth, scattering control, antenna shielding, sen