Line-projection apparatus for arrays of diode-laser bar stacks
US8547641B2 · kind B2 · utility
8Cited by
8References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2010 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Sep 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/405
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In optical apparatus for illuminating a mask-plane with a line of light, a light source includes four fast-axis stacks of laser diode bars with fast and slow axis collimating arrangements providing four collimated beams of diode-laser light. A combination of a lens element and two diffraction gratings collects the four collimated beams and spreads the beams in the fast-axis direction such that the spread beams overlap in the mask plane to form a line of light having a length in the fast-axis-direction and a width in the slow-axis direction of the diode-laser bar stacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.