Adjustable illumination system for a barcode scanner

Apparatus for adjusting the position of a line of light in barcode space that includes

• a support frame having a rear housing containing a solid state imager and a pair of arms extending forwardly from the housing,
• an imaging lens mounted between the arms for focusing an image of a target in barcode space along a linear optical path onto said solid state imager,
• illumination means mounted upon said frame containing a plurality of light emitting diodes located on either side of said imaging lens in coplanar alignment with said imaging lens and being perpendicular to said optical path for illuminating a target in barcode space,
• an elongated optical element that contains a pair of spaced apart cylindrical illumination lenses said illumination lenses being located on either side of the optical path between the light emitting diodes and the target, each illumination lens containing a rear piano light entrance surface and semi-circular light exit face, said optical element having a central opening that passes through said optical path wherein a light image of said target passes through said opening
• each of said arms contains an arcuate camming surface at a distal end that is adapted to ride in a complementary recess formed in the optical element,
• a field stop mounted between the said light emitting diodes and the optical element for producing a line of light in barcode space, and
• adjusting means for rotatably positioning said optical element about an axis to adjust the position of the line of light in barcode space.

Apparatus for adjusting the position of a line of sight in barcode space that includes:

• a support frame having a rear housing containing a solid state imager;
• an imaging lens supported in said frame for focusing an image of a target in barcode space along a linear optical axis of the solid state imager;
• an illumination means supported in said frame for projecting a line of light upon a target in barcode space;
• said illumination means including at least one cylindrical illumination lens element having a light entrance face and a light emitting face;
• an adjusting means for positioning said illumination lens in relation to said source so that the line of sight can be selectively positioned in barcode space;
• said adjusting means including an optical element receiving surface for engagingly receiving said illumination lens in a plurality of relative positions during assembly;
• and means for securing said illumination lens to said optical element receiving surface after desired relative positions have been established.

Apparatus for adjusting the position of a line of light in barcode space that includes:

• a support frame having a rear housing containing a solid state imager and a forwardly extending optical element mounting surface;
• an imaging lens mounted on said support frame for focusing an image of a target in barcode space along a linear optical path onto said solid state imager;
• illumination means mounted on each side of said linear optical path for illuminating a target in barcode space;
• an elongated optical element that contains a pair of spaced cylindrical illumination lenses, said illumination lenses being located on either side of the optical path between the light source and the target, each illumination lens containing a light entrance face and a light exit face,
• said optical element being adapted to engage said optical element mounting surface in a plurality of relative positions during the assembly process;
• a field stop mounted between said light source and said optical element so as to produce a line of light in barcode space;
• and
• adjusting means for selectively moving said optical element relative to said optical element mounting surface so as to obtain a desired position of the line of light in barcode space.