Multi-focal vision system
US5633487A · kind A · utility
60Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Dec 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2207/1013
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A machine vision system images bar code labels moving through a horizontal plane at variable object distances within the system's object depth of field Z .sub.obj with a plurality of sequential line images, each with different object lengths which gradate Z .sub.obj into plural focused object planes, and the object plane within which the bar code label lies provides a focused optical image of the bar code to a multilinear photodetector which transduces the focused optical image into a corresponding electrical signal for further processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.