our ability to observe faint objects such as extrasolar planets or debris disks at small angular separations is greatly limited by the presence of a speckle halo caused by imperfect wavefront ...

The Hartmann–Shack wavefront sensor commonly consists of an array of microlenses, conjugated with the eye's pupil, and a camera placed at its focal plane. An infrared beam is projected onto the ...

Close-up of the wavefront pattern recorded on the holographic film (Credit: 3Blue1Brown, YouTube) In a recent video by [3Blue1Brown], this process of recording the wavefront with holography is ...