Lighting and detection system
US5102227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1989 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Dec 1, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A backlighting system is comprised of a light source, a sensing portion and an imaging portion. The light source may be a linear backlight that has few hot spots and provides uniform lighting oriented primarily in a single dimension. Alternatively it may be an area backlight that provides backlighting in a uniform manner across two-dimensions. Furthermore, a line light source may be provided that provides a relatively large line source of light oriented almost exclusively in a single dimension. The imaging portion of the machine vision system preferably includes an element for homogenizing the received image onto the imaging array. The homogenization element may adopt either a dispersing approach or a condensing approach.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.