Method for wave front measurement using Shack-Hartmann sensor

摘要

The method involves using a combination of a liquid crystal matrix with individual controllable sub-apertures and a matched refractive or diffractive microlenticular screen. Each aperture coincides with a lens of the screen. A CCD chip of a sufficient pixel count is arranged in the focal plane of the microlenticular screen, to detect the spot intensities. The LCD matrix is controlled by a personal computer so that successive different screen fields lead to a field of spot images. The sub-apertures are specified by the computer and are identified with it.