Patent ID: 9697401
Date: 2017-07-04
CPC Classifications: G02B,G06K

Claim:
1. An add-on device for an image scanner for scanning barcodes, the image scanner having a scanner lens, the scanner lens having a lens front and an optical axis; the add-on device comprising: a housing, the housing mounted to the scanner lens front on the image scanner; a lens holder with a first position for holding a first lens, a second position being an aperture, and a third position for holding a second lens; a high-density lens mounted in the first position; an extended range lens mounted in the third position; the lens holder being mounted in the housing and being transverse to the optical axis of the image scanner; the lens holder being movable within the housing to alternately position the high-density lens, the aperture, and the extended range lens to be in alignment with the optical axis of the scanner lens of the image scanner.