Method for designing a multi-plane conversion device, phase plate obtained by this method, and multi-plane conversion device
US11828935B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2019 |
| Grant date | Nov 28, 2023 |
| Priority date | — |
| Expiry date | Jun 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/004
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for designing a device for multi-plane conversion of light radiation, the device implementing a plurality M of phase masks intercepting the light radiation in order to phase-shift the radiation for applying a predetermined transformation to the light radiation. First and second mode families (u,v) with separable variables (x,y) are defined. A number N of pairs of indices {i,j}k is chosen to form first and second used mode families, respectively, by selecting the modes of index pairs {i,j}k from the first mode family and from the second mode family, respectively. Next, the phase-shift quantities ϕ1(x,y) are established, the M phase masks making it possible to transform each mode of index pairs {i,j)k of the first used mode family into the mode of the same index pair {i,j}k of the second used mode family. A phase plate may be obtained by means of the design method and used in a multi-plane conversion device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.