| 摘要 |
1,162,853. Holograms; electro-photographic deformation images. RANK XEROX Ltd. Jan.18, 1967 [Jan.20, 1966], No.2762/67. Headings G2C and G2H. A method of forming a phase hologram comprises the steps of forming a charge pattern on a deformable thermoplastic layer, said charge pattern corresponding to a holographic interference pattern, and then softening the thermoplastic layer until it deforms in a pattern of ridges and valleys according to the charge pattern. A source of coherent electromagnetic radiation, e. g. a laser 11, is used to form a hologram of an object 14 by the two-beam method, a charged deformable thermoplastic imaging member 16 including a photo-conductive insulator being positioned so that the hologram can be recorded thereon in the form of a pattern of electrostatic charge. The member 16 may then be recharged, depending on its construction, and then replaced in the optical system and exposed to one beam, the other being blocked by a shutter, while the thermoplastic surface is heated. Thus the reconstructed image may be viewed while the thermoplastic imaging member is being developed, so that the development may be stopped when the image is sufficiently developed. |
