Method and apparatus for parts manipulation, inspection, and replacement
US7773209B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2009 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Mar 3, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/521
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved method and apparatus for machine vision. One embodiment provides automated imaging and analysis, optionally including Scheimpflug's condition on the pattern projector, telecentric imaging and projecting, an IR filter, a mask to constrain observed illumination, and/or a sine-wave projection pattern for more accurate results. Another embodiment provides circuitry for a machine-vision system. Another embodiment provides a machine-vision system, optionally including accommodation of random orientation of parts in trays, irregular location of features being inspected, crossed pattern projectors and detectors for shadow reduction, detection of substrate warpage as well as ball-top coplanarity, two discrete shutters (or flash brightnesses) interleaved (long shutter for dark features, short shutter for bright features). Another embodiment provides parts inspection, optionally including a tray elevator that lifts trays to an inspection surface, moves trays in short tray dimension, provides first tray inspection at a major surface of the elevator, and/or provides a tray flipper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.