Intravolume diffractive optical elements
US6884961B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2001 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Aug 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of producing in a solid transparent material, a diffractive optical element for the transformation of an incident wave in a predefined manner, by developing a mathematical model of the element in terms of the required transformation, then using that model for determining a set of points which form the desired diffractie optical element, and then focusing a pulsed laser beam sequentially onto the points in the set, such that it causes optical breakdown damage at those points. Numerical solutions for determining the positions of the set of points from the mathematical model are presented. The production of number of elements for specific applications is described. Complete laser systems capable of monitoring the production of the points in real time according to the results obtained by diffraction of the incident wave by the element under production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.