Illumination device and optical processing apparatus using the same
US6515694B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 2000 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | May 5, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1634
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An illumination system for illuminating a particular surface, to be illuminated, with light from a light source, includes a first optical component having an optical power with respect to a predetermined plane, and a second optical component having an optical power with respect to the predetermined plane, wherein the particular surface is illuminated through Koehler illumination with respect to a plane orthogonal to the predetermined plane and is illuminated approximately through critical illumination with respect to the predetermined plane, wherein the first and second optical components are adapted to provide an afocal system, and wherein the condition for the afocal system is disconnected when a relative position between the first and second optical components is changed, whereby an illumination range with respect to the predetermined plane, upon the particular surface, is changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.