Dynamic focusing apparatus for an optical imaging system using a deformable mirror
AssigneeAccu-Sort Systems, Inc.
InventorsThomas J. Brobst, Edward I. Chaleff, Kurt Hecht, Michael L. Veksland, Albert Wurz
Life of this patent
Estimating the term…
Abstract
A focus changing apparatus for an optical scanner which increases the depth of the field of the optical scanner. The focus changing apparatus is optically located between a laser source and a scan mirror and includes a plurality of alternating curved and flat facets. Alternatively, a piezoelectric deformable mirror may be optically located between the laser source and a flat faceted scan mirror to provide for increased depth of field of the optical scanner.
Claims6
A scanner for use in reading coded symbologies located at various distances from the scanner, the scanner comprising:
- a distance sensing device for determining a distance between the scanner and a region to scan for said coded symbologies;
- means for illuminating said region;
- deformable mirror means for focusing light on said region in response to the determined distance;
- and
- means for detecting light reflected from said region.
Dependencies are inferred from the claim text.