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:
Aug. 03, 1976
Filed:
Sep. 04, 1974
Fuji Photo Film Co., Ltd., , JA;
Abstract
A rotary polygonal mirror is used to horizontally deflect a laser beam emitted by a laser source. A cylindrical lens is provided between the laser source and the rotary polygonal mirror for vertically converging the laser beam to form a horizontally extending light spot on the face of the rotary mirror. The beam reflected by the face of the mirror is vertically collimated and horizontally converged by a convergent lens to form a vertically extending light spot on an elemental hologram plate. By the hologram plate, the beam is vertically converged. Behind the hologram plate is located another cylindrical lens for horizontally converging the beam. By the vertical convergence effect of the elemental hologram plate and the horizontal convergence effect of the second cylindrical lens, the laser beam incident to the elemental hologram plate is converged to a minute light spot on a focusing plane. A microfilm is located on the focusing plane and the laser beam scans the microfilm to record information thereon.