Diffuse on-axis light source
US5187611A · kind A · utility
44Cited by
13References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Aug 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/144
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light source suitable for illuminating work pieces imaged by machine vision cameras. A beam splitter mirror is located within the camera optical axis, a uniform intensity light source provides light to a diffuser and the diffused light is reflected from the beam splitter to uniformly illuminate the object being observed by the camera with a minimum of stray reflections or glare. Stray and incidental light is absorbed by a light trap located in opposed relation to the diffuser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.