Arrangement for and method of generating uniform distributed illumination pattern for imaging reader
US8450708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2010 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Jun 10, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10831
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A substantially uniform distributed illumination pattern of light is generated on and along a symbol to be read by image capture. A solid-state imager is mounted on a tilted printed circuit board in a tilted handle of an ergonomic reader. An imaging lens assembly captures return light over a field of view from the symbol along an imaging axis, and projects the captured return light onto the imager. An illumination light source is mounted on the board for emitting illumination light at an acute angle of inclination relative to the imaging axis. An optical component includes a first lens portion with a polynomial incident surface for intercepting, bending and aligning the emitted illumination light to generate the pattern in a scan direction along the symbol, and a second lens portion with a toroidal or cylindrical aspherical surface for collimating the aligned illumination light to generate the pattern in a transverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.