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. 17, 2001
Filed:
Jun. 29, 1999
Akira Shirakura, Tokyo, JP;
Hirotsugu Suzuki, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
A hologram-image recording method and apparatus are provided which prevents or attenuates vibrations so as to produce a bright holographic stereogram having high diffraction efficiency. Such apparatus may includes an exposing recording portion for sequentially exposing and recording interference fringes generated by an object laser beam modulated in accordance with each element image of parallax images and a reference laser beam having coherency with the object laser beam on a recording medium as an elemental hologram, wherein the object laser beam is incident on a surface of the recording medium and the reference laser beam is incident on one of said surface and an opposite surface of the recording medium. The apparatus may further include a moving device for moving the recording medium in a predetermined direction and a braking device for applying a load to the recording medium which resists the movement thereof.