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US 10,255,469 B2Granted
Illumination apparatus for a barcode reader
AssigneeHand Held Products, Inc.
InventorsAlain Gillet, Jean-Luc Basso, Chen Feng, Yunxin Ouyang, Jie Ren
Life of this patent
Estimating the term…
Abstract
Illumination systems for illuminating objects to be read or imaged by optical readers, such barcode scanners and direct part marking (DPM) barcode readers, are provided. One implementation includes an illumination apparatus including a light source and a freeform lens having a cavity configured to at least partially surround the light source. The freeform lens is configured to provide both dark field illumination and bright field illumination to an object to be imaged.
Claims19
An optical reading device comprising:
- one or more illumination devices;
- and
- an imager configured to optically scan an object;
- wherein each of the illumination devices is configured to provide dark field illumination and bright field illumination to the object, each illumination device including a freeform lens comprised of a first radial section for providing the dark field illumination and an opposing second radial section for providing the bright field illumination.
1 more element
An illumination apparatus comprising:
- a light source;
- and
- a freeform lens having a cavity configured to at least partially surround the light source, the freeform lens comprised of a first radial section for providing dark field illumination and an opposing second radial section for providing bright field illumination.
A freeform lens comprising:
- a first section configured to direct light rays from a light source to provide dark field illumination;
- and
- a second section configured to direct light rays from the light source to provide bright field illumination, each of the first section and the second section defining a radial sector of the freeform lens.
Dependencies are inferred from the claim text.