Interferometric parallel detection using digital rectification and integration
US11060843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2020 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Apr 7, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B9/02083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The source light having a range of optical wavelengths is split into sample light and reference light. The sample light is delivered into a sample, such that the sample light is scattered by the sample, resulting in signal light that exits the sample. The signal light and the reference light are combined into an interference light pattern having optical modes having oscillation frequency components respectively corresponding to optical pathlengths extending through the sample. Different sets of the optical modes of the interference light pattern are respectively detected, and high-bandwidth analog signals representative of the optical modes of the interference light pattern are output. The high-bandwidth analog signals are parallel processed, and mid-bandwidth digital signals are output. The mid-bandwidth digital signals are processed over an i number of iterations, and a plurality of low-bandwidth digital signals are output on the ith iteration. The sample is analyzed based on the low-bandwidth digital signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.