US 12,235,418 B2
Telephoto lens for compact long range barcode reader
Chinh Tan, East Setauket, NY (US); and Vladimir Gurevich, Great Neck, NY (US)
Assigned to Zebra Technologies Corporation, Lincolnshire, IL (US)
Filed by ZEBRA TECHNOLOGIES CORPORATION, Lincolnshire, IL (US)
Filed on Jul. 25, 2022, as Appl. No. 17/873,058.
Claims priority of provisional application 63/239,348, filed on Aug. 31, 2021.
Prior Publication US 2023/0067508 A1, Mar. 2, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/34 (2006.01); G02B 13/02 (2006.01); G02B 13/18 (2006.01); G06K 7/10 (2006.01); G06K 7/14 (2006.01)
CPC G02B 13/02 (2013.01) [G02B 9/34 (2013.01); G02B 13/18 (2013.01); G06K 7/10831 (2013.01); G06K 7/1413 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An imaging engine for decoding barcodes, the imaging engine comprising an imager and a telephoto lens assembly for long range imaging of a barcode via the imaging engine, the telephoto lens assembly including:
a first lens, disposed along an optical axis to receive light from an object of interest;
a second lens, disposed along the optical axis to receive light from the first lens and further to correct for pupil aberration of the image projected after a fourth lens onto the imager;
a third lens, disposed along the optical axis to receive light from the second lens and further to correct for chromatic aberration of the image projected after the fourth lens onto the imager, wherein the chromatic aberration is introduced by the first lens; and
the fourth lens, disposed along the optical axis to receive light from the third lens and further to correct for optical field curvature of the image projected after the fourth lens onto the imager.