Method for measuring complex degree of coherence of random optical field by using mutual intensity-intensity correlation
US11366017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2020 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Jul 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2009/0265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention discloses a method for measuring a complex degree of coherence of a random optical field by using a mutual intensity-intensity correlation, including the steps of: building a test optical path; rotating a quarter-wave plate to enable the fast axis of the quarter-wave plate to be consistent with a polarization direction of reference light, to obtain light intensity distribution information of a first combined light; rotating the quarter-wave plate to enable the slow axis of the quarter-wave plate to be consistent with the polarization direction of the reference light, to obtain light intensity distribution information of a second combined light; blocking the reference light to obtain light intensity distribution information of to-be-tested light; blocking the to-be-tested light to obtain light intensity distribution information of the reference light; and calculating the amplitude and phase of a complex degree of coherence of the to-be-tested light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.