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:
Nov. 25, 1980
Filed:
Dec. 09, 1977
Hiroyuki Ikeda, Yokohama, JP;
Moritoshi Ando, Tokyo, JP;
Fujitsu Limited, , JP;
Abstract
A light scanning apparatus comprises a disk having a plurality of holograms, and a laser beam source for radiating and directing a laser beam (which functions as a reproduction wave) onto the holograms in a sequential order, wherein each of the holograms converges the laser beam toward a corresponding focal point. While the disk and the laser beam are moved relative to each other, the focal point scans an object to be scanned in a particular scanning direction. The laser beam acting as a reproduction wave is preferably a spherical wave laser beam. The holograms are constructed by a process in which both a spherical wave laser, acting as a reference wave, and a plane wave laser are applied to a photosensitive layer which is to be constructed as the hologram, in which process the plane wave laser beam is applied onto the photosensitive layer at a predetermined gradient forming an offset angle between the direction in which the plane wave laser is oriented and the direction in which the photosensitive layer extends.