Optical reader
AssigneeHand Held Products, Inc.
InventorMatthew W. Pankow
Life of this patent
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Abstract
An optical reader comprises: a first illumination source for projecting a first illumination field on a target; a second illumination source for projecting a second illumination field on a target; an image sensor array for converting light from a target into output signals representative thereof; and, a processor for decoding information from information bearing indicia within the target derived from the output signals; and, wherein the illuminance of the first illumination field on the target at a distance D from the first illumination source is greater than the illuminance of the second illumination field on the target at the distance D from the second illumination source.
Claims24
An optical information bearing indicia reader on a comprising:
- a first illumination source for projecting a first illumination field on the target;
- a second illumination source for projecting a second illumination field on the target;
- an image sensor array for converting light from a target into output signals representative thereof;
- and,
- a processor for decoding information from information bearing indicia within the target derived from the output signals;
- and,
- wherein illuminance of the first illumination field on the information bearing indicia at a distance D from the first illumination source is greater than illuminance of the second illumination field on the information bearing indicia at the distance D from the second illumination source.
An optical information bearing indicia reader comprising:
- an illumination source for projecting an illumination field on a target;
- an image sensor array for converting light from a target into output signals representative thereof, the image sensor array having a field of view (FOV);
- and,
- a processor for decoding information from information bearing indicia within the target derived from the output signals;
- and,
- wherein the illumination field on the target is smaller than the FOV.
A method of reading information bearing indicia on a target comprising the steps of:
- illuminating the target with a first illumination source having a first illumination field and a second illumination source having a second illumination field;
- converting light from the target with an image sensor array into output signals representative thereof;
- and,
- decoding information from information bearing indicia within the target derived from the output signals;
- and,
- wherein illuminance of the first illumination field on the information bearing indicia at a distance D from the first illumination source is greater than illuminance of the second illumination field on the information bearing indicia at the distance D from the second illumination source.
A method of reading information bearing indicia on a target comprising the steps of:
- illuminating the target with a first illumination source having an illumination field;
- converting light from the target with an image sensor array into output signals representative thereof, the image sensor array having a field of view (FOV);
- and,
- decoding information from information bearing indicia within the target derived from the output signals;
- and,
- wherein the illumination field on the target is smaller than the FOV.
Dependencies are inferred from the claim text.