Diffractive optical system with synthetic opening and laser cutting device incorporating this system
US6236509A · kind A · utility
16Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/1086
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An optical device for focusing a light beam. The device includes a Fourier diffractive element that can separate an incident beam into n beams along n directions which are symmetric about an optical axis. The device also includes a diffractive element including n Fresnel lenses capable of refocusing the n beams onto the optical axis. The device may be used with lasers and laser cutting devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.