Method and device for fast focusing by directly detecting target moments
US12112507B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2024 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | May 8, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/67
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a method and a device for fast focusing by directly detecting target moments. The method includes: generating a setting modulation matrix and loading the modulation matrix to an optical modulator, receiving an optical signal emitted or transmitted by a target object at a current focusing position, and modulating, by the modulation matrix, the optical signal; acquiring a geometric moment value of the target object at the current focusing position according to the modulated optical signal; calculating a central moment; and a focusing position, obtained by refocusing, serving as the current focusing position, returning the optical signal of the target object that is received at the current focusing position and emitted or transmitted by the target object, comparing the central moment corresponding to the target object at all the focusing positions, and determining the focusing position that corresponds to the minimum central moment as the focusing position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.