Soft clock delay for OCT system and method therefor
US8139226B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Nov 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/4795
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical coherence analysis system comprises a swept source laser for generating optical signals that are tuned over a scan band; an interferometer for transmitting the optical signals over a sample arm and reference arm and combining the optical signals; a k-clock for generating a sampling clock indicating non-linearities in the frequency tuning of the optical signals over the scan band, the k-clock being not delay matched to propagation delays for the optical signals in the interferometer; a sampling system for sampling the optical signals from the interferometer in response to the k-clock to generate interference signals; and a processing system for determining non-linearities in the sampling clock and for transforming the interference signals into an image of a sample in response to the non-linearities. The system compensates for the lack of an electronic delay of k-clock using a nonuniform discrete Fourier transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.