Diffractive optical element and method of manufacturing a mold
US6590709B1 · kind B1 · utility
10Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1998 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Apr 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1876
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A diffractive optical element acts as a lens. The optical element has a diffraction grating. The diffractive grating is provided with a plurality of ridges. Each of the ridges has a transmissive surface. A sectional profile of the transmissive surface is composed of a plurality of successively connected strait lines of an identical length. The length varies from one ridge to another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.