Optical element
US7221496B2 · kind B2 · utility
7Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Jul 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2240/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A complex amplitude spatial optical modulation element for low 0th-order diffraction light has a plurality of three-dimensional cells two-dimensionally on an XY plane. Each cell is light transmitting and defines a specific amplitude and phase. An upper surface of each cell has a first region in which a groove is formed and a second region at both sides of the first region with light blocking layers on upper surfaces. The groove has a bottom surface with an area set in accordance with the specific amplitude and a depth set in accordance with the specific phase of the corresponding cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.