Apparatus for displaying three-dimensional image by using Pockels readout optical modulator

Patent 5198913 Issued on March 30, 1993. Estimated Expiration Date:

February 24, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3542452

Method and apparatus for 3-D image synthesis
Patent #: 4669812
Issued on: 06/02/1987
Inventor: Hoebing

Optical-digital hologram recording
Patent #: 4701006
Issued on: 10/20/1987
Inventor: Perlmutter

Image reconstructing apparatus Patent #: 5029221
Issued on: 07/02/1991
Inventor: Takiguchi, et al.

Inventors

Assignee

NGK Insulators, Ltd.

Application

No. 840089 filed on 02/24/1992

US Classes:

359/7, Crystalline material359/1, HOLOGRAPHIC SYSTEM OR ELEMENT359/9For synthetically generating a hologram

Examiners

Primary: Arnold, Bruce Y.
Assistant: Ryan, J. P.

Attorney, Agent or Firm

Parkhurst, Wendel & Rossi

Foreign Patent References

55-60980 JP. 05/13/1980

International Class

G03H 001/08

Foreign Application Priority Data

1991-03-01 JP

Abstract

An apparatus for displaying a three-dimensional image of a plurality of tomographic images by storing pictorial information of a tomographic image in an image convering element, forming interference fringes between a reading light beam which is transmitted through the image converting element and is modulated in accordance with the pictorial information stored therein and a reference light beam, and recording the interference fringes on a photographic plate. A three-dimensional image is reproduced by projecting the reference light beam onto the thus developed photographic plate. The image converting element is formed by a Pockels readout optical modulator. An intensity and position of a coherent light beam is modulated in accordance with the pictorial information of the tomographic image, and the thus modulated coherent reading light beam is made incident upon the Pockels readout optical modulator.