Patent ID: 9507985
Filing Date: 2016-11-29
CPC Classification: G06K

Claim Text:
1. An apparatus comprising: an illumination light source; an illumination lens comprising a first Fresnel surface facing the illumination light source and a second surface having a microlens array thereon, the first Fresnel surface configured to direct light received from the illumination light source towards the second surface to generate illumination light towards a target object through the microlens array on the second surface, the illumination light having a predetermined illumination field of view; an imaging lens arrangement; an imaging sensor having photosensitive elements configured to detect light from the target object within an imaging field of view through the imaging lens arrangement at least during a time period when the target object is illuminated by the illumination light, wherein the imaging sensor is configured to output image data from the photosensitive elements; a controller configured for processing the image data to decode an image of a barcode on the target object; and wherein the first Fresnel surface is configured to collimate light from the illumination light source towards the microlens array on the second surface of the illumination lens with the microlens array configured to broadening an apparent light source to create uniform chip image.