US 12,393,000 B2
Optical arrangement for small size wide angle auto focus imaging lens for high resolution sensors
Igor Vinogradov, Oakdale, NY (US); and Alexander J. Naney, Kings Park, NY (US)
Assigned to Zebra Technologies Corporation, Lincolnshire, IL (US)
Filed by ZEBRA TECHNOLOGIES CORPORATION, Lincolnshire, IL (US)
Filed on Feb. 25, 2020, as Appl. No. 16/800,866.
Prior Publication US 2021/0263290 A1, Aug. 26, 2021
Int. Cl. G02B 13/18 (2006.01); G02B 3/12 (2006.01); G02B 3/14 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/009 (2013.01) [G02B 3/12 (2013.01); G02B 3/14 (2013.01); G02B 13/18 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An optical assembly for wide angle auto-focused imaging of an object of interest, the optical assembly comprising:
a first lens group disposed along an optical axis configured to receive light from the object of interest and configured to correct for spherical aberrations of an image projected after a third lens group onto an imaging sensor;
a liquid lens disposed along the optical axis configured to receive the light from the first lens group and further configured to have a variable optical power from −5 diopters to +15 diopters;
an aperture stop disposed along the optical axis between the liquid lens and the second lens group;
a second lens group disposed along the optical axis configured to receive the light from the liquid lens and further configured to correct for optical aberrations;
the third lens group being disposed along the optical axis configured to receive the light from the second lens group and further configured to correct for optical field curvature and distortion of the image projected after the third lens group onto the imaging sensor; and
the imaging sensor being disposed along the optical axis at a back focal distance of the third lens group, and configured to receive the image from the third lens group and to generate an electrical signal indicative of the received image;
wherein the first lens group comprises a plastic aspheric lens disposed along the optical axis, the plastic aspheric lens having a first aspheric surface along the optical axis and a second aspheric surface opposite the first aspheric surface disposed along the optical axis, and wherein the first plastic aspheric lens is formed of a plastic having an Abbe value of approximately 56 and a positive optical power.