Multiple Option Holographic Scanning Disk
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-30
This article describes a multiple option holographic disk that may be used in a single scanner to provide different scan patterns. Referring to the drawing, facets identified with an A prefix provide one disk design which might be used to provide an omni-directional scan pattern with a large depth of field. The facets on the outer perimeter of the disk would be used to generate the scanning beam. The returned light would be collected by the same facet and by a related facet on the same diameter on the disk. The combined area of each set of A facets would vary as a function of the focal length of the beam produced by those facets.