公开(公告)号：DE2817432A1

公开(公告)日：1978-10-26

申请号：DE2817432

申请日：1978-04-21

Applicant: IBM

Inventor： HEILING GERALD MICHAEL

IPC: H04N3/02 ,  G02B5/32 ,  G02B26/10 ,  G02B27/17 ,  G11B27/28

Abstract: The flat disk contains a number of holograms made from the interference of a plane wavefront with spherical wavefront modified by a first cylindrical lens. The disk is rotated so that a plane reconstruction wavefront sweeps across the holograms. The resulting reconstructed wavefront is passed through a second cylindrical lens, resulting in a focussed point sweeping across an object surface in one or more straight lines. The medium comprises a flat disk with an annulus with patterns representing interactions.