The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 1977
Filed:
May. 12, 1975
Applicant:
Inventors:
Yasutsugu Takeda, Kokubunji, JA;
Yoshito Tsunoda, Hachioji, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ; G03H / ;
U.S. Cl.
CPC ...
350-35 ;
Abstract
A holographic device comprises a film for displaying a three-dimensional object as images, each of which is obtained as viewed in a respective one of a plurality of different directions, a phase plate for providing a light beam for illuminating each of said images of the film with an additional phase at random, a sampling grating for dividing a light beam from the phase plate into a plurality of small groups of light beams, a photosensitive material, and a slit for simultaneously radiating said light beam and a light beam having coherency therewith on each position of said photosensitive material in succession.