US Patent No. 10,509,931

METHODS, SYSTEMS, AND APPARATUSES FOR SCANNING AND DECODING DIRECT PART MARKING INDICIA


Patent No. 10,509,931
Issue Date December 17, 2019
Title Methods, Systems, And Apparatuses For Scanning And Decoding Direct Part Marking Indicia
Inventorship Alain Gillet, Toulouse (FR)
Assignee HAND HELD PRODUCTS, INC., Fort Mill, SC (US)

Claim of US Patent No. 10,509,931

1. A scanning system adapted to be mechanically coupled to an optical reader, the scanning system comprising:an illumination module configured to provide an illumination;
a beam splitter module configured to project the illumination as an in-line illumination with respect to an imaging axis of an imager of the optical reader, wherein the beam splitter module projects the in-line illumination in a first direction of a target including a Direct Part Markings (DPM) indicia; and
a telecentric lens assembly configured to:
direct the in-line illumination, incident on a first surface of the telecentric lens assembly as collimated light, in the first direction of the target parallel to an optical axis of the telecentric lens assembly;
direct a first portion of light reflected from at least one rough surface of the target that is incident on a second surface of the telecentric lens assembly, at a defined angle with respect to the optical axis of the telecentric lens assembly, wherein the first portion of the reflected light is directed in a direction away from the imager; and
direct a second portion of the reflected light from the target, that travels parallel to the optical axis of the telecentric lens assembly and is incident at the second surface of the telecentric lens assembly, in a second direction of the imager, wherein the second portion of the reflected light is received at the imager in order to capture an image of the target.