Fresnel diffraction describes the complex light propagation that occurs when a wavefront encounters an abrupt phase change, typically at the boundary of two different media or at an engineered phase ...

A Fast and High-precision Alignment Method for IFU Based on Optical Interferometry and Fresnel Diffraction Anzhi Wang1, Jiabin Wang1, Xingyu Yang1, Shengjia Wang1, Yunxiang Yan1,2 , Qi Yan1,3, ...

A laser beam is shone onto a variable rectangular aperture. The size of the hole determines the type of diffraction produces on the screen. Very small apertures produce Fraunhofer diffraction, and ...

A laser beam is shone onto a ball bearing and a bright spot appears at the centre of the object’s shadow due to Fresnel diffraction. Place the laser on top of the lab jacks, making sure the laser is ...