Method and system for calculating laser beam spot size
US9852518B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2016 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Jun 10, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20224
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for calculating laser beam spot size, comprising: collecting a spot image of a laser beam and a corresponding background noise image along an optical axis direction; conducting pretreatment using a background subtraction method and a threshold method according to the spot image and the background noise image collected to obtain a pretreated spot image; calculating the central position of a laser spot of the pretreated spot image; and storing the pixel gray values of the spot image at the central position of the laser spot on a horizontal direction and a vertical direction, then conducting Gaussian curve fitting, calculating variances of Gaussian fitted curves on the horizontal direction and the vertical direction, and obtaining the spot radiuses of the spot image on the horizontal direction and the vertical direction according to the variances calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.