Systems and methods for diffuse illumination
US6334699B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Apr 8, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V7/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light pattern controller provides a pattern of light to a collimator. The light pattern controller includes a beam deflector that sweeps a circular pattern with a radius that is directly proportional to the rotational speed of the beam deflector. Alternatively, the light pattern controller includes a two-dimensional scanning galvanometer that sweeps out the circular pattern or a liquid crystal shutter. The pattern of light is collimated and reflected such that it is substantially parallel to the optical axis of an imaging system. A focusing element redirects the collimated light pattern onto a sample part at an angle of incidence which is a function of the radius of the light column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.