Physical parameter estimating method that determines a matched order of an intensity distribution signal according to calculated magnitude spectrums and electronic apparatus
US10429169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2017 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | May 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2441
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A physical parameter estimating method, a physical parameter estimating device, and electronic apparatus are disclosed. The method includes: reading a Newton's rings fringe pattern of a unit to be measured; calculating a magnitude spectrum of an intensity distribution signal of at least one first-direction pixel set in the Newton's rings fringe pattern under each fractional Fourier transform (FRFT) order in a searching range of FRFT orders; determining a matched order of the intensity distribution signal according to the calculated magnitude spectrums; and estimating a physical parameter involved in the interferometric measurement according to at least the matched order. Therefore, physical parameters of the unit to be measured can be estimated with high accuracy even in presence of noise and obstacles in the fringe pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.