Planar laser illumination and imaging (PLIIM) system employing wavefront control methods for reducing the power of speckle-pattern noise digital images acquired by said system
US6736321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2001 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Dec 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4025
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A planar laser illumination and imaging (PLIIM) based system employing wavefront control methods for reducing the power of speckle-pattern noise within digital images acquired by the system. The system comprises a housing having a first light transmission aperture, a second light transmission aperture, and a third light transmission aperture, wherein the first and second light transmission apertures are optically isolated from said third light transmission aperture spatially aligned on opposite sides thereof. A pair of planar laser illumination arrays (PLIAs) are mounted within the housing, for producing and projecting a first and second planar laser illumination beams (PLIBS) through the first and second light transmission apertures respectively, thereby producing a composite planar laser illumination beam (PLIB) outside of the housing, and illuminating an object therewith as the object is transported past the first, second and third light transmission apertures. An image formation and detection (IFD) module is mounted within the housing, and has a linear image detection array and imaging forming optics for providing the linear image detection array with a field of view (FOV) whic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.