Imaging apparatus
US-9841268-B2 · Dec 12, 2017 · US
Systems and methods for artifact suppression by frequency shifting or cavity length adjustment
US8947672B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8947672-B2 |
| Application number | US-201313782311-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 1, 2013 |
| Priority date | Jul 26, 2012 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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Swept source designs that eliminate or significantly reduce artifacts in optical coherence tomography are presented. One embodiment of the present invention is a source design that frequency shifts the coherence revival interference signal to a frequency larger than the A/D detection bandwidth or the post-processing bandwidth. In another embodiment, the introduced frequency shift is large enough to introduce a Doppler shift of the modes of the laser, which causes a blurring of the comb function, and thus eliminates or reduces mode hopping. In another embodiment, adjusting the cavity optical path length prior to data acquisition depending on the given optical layout configuration to reduce or eliminate coherence revival artifacts is described.
First claim
Opening claim text (preview).
What is claimed is: 1. A laser source for use in an interferometric based imaging system, said laser comprising: a tunable filter for spectrally filtering light from a source to generate a tunable optical signal that is tuned over a wavelength band; and a phase modulating element to adjust the phase of the light as it is being tuned to reduce coherence revival signals in an interferometric image generated from the light. 2. A source as recited in claim 1 ,…
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Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8947672B2 cover?
- Swept source designs that eliminate or significantly reduce artifacts in optical coherence tomography are presented. One embodiment of the present invention is a source design that frequency shifts the coherence revival interference signal to a frequency larger than the A/D detection bandwidth or the post-processing bandwidth. In another embodiment, the introduced frequency shift is large enoug…
- Who is the assignee on this patent?
- Zeiss Carl Meditec Inc
- What technology area does this patent fall under?
- Primary CPC classification G01B9/02058. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).