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:
May. 12, 1981
Filed:
Nov. 17, 1978
Charles S Ih, Newark, DE (US);
University of Delaware, Newark, DE (US);
Abstract
A two-dimensional serial and field multiplexing holographic scanner is provided which is provided with multiple rows of holograms on the disk to achieve serial multiplexing and with means to shift or tilt an auxiliary reflector to focus the scanning beam on entirely new field points so as to achieve field multiplexing. The provision of both serial and field multiplexing provides a higher resolution scan of the object than otherwise obtainable. The scanner comprises a rotating disc that has recorded on it a plurality of holograms positioned on the disc face in multiple rows. Each hologram is particularly placed on the disc and focused to a specific object point. In a given row, each hologram is focused at a different longitudinal point on the object to be scanned. An auxiliary reflector is also provided, which is positioned in front of the rotating disc and within the outside diameter of the outermost holograms on the disc. The auxiliary reflector may be tilted or shifted by means of a piezo-electric drive. Upon completion of one revolution of the disc, or upon completion of a set of multiple revolutions equal to the number of rows of holograms on the disc, or upon any desired number of revolutions, the auxiliary mirror may be shifted (or tilted), and thus, upon the second set of revolutions of the disc, the holograms on the disc scan an entirely new field of points, both longitudinally and laterally on the object to be scanned.