SYNCHRONIZED DUAL MODE OCT SYSTEM
First Claim
1. A system comprising:
- an adjustable frequency narrow band light source;
a beam splitter for dividing light from said light source along a sample and a reference path;
an adjustable frequency narrow band detector positioned to receive light from both the sample and the reference paths; and
a controller configured for;
controlling a frequency and bandwidth of said light source to emit light pulses over time in a succession of narrow frequency bands,synchronizing said detector to said light source by tuning said detector to be sensitive to a respective narrow reception band that overlaps each narrow band of said succession of narrow bands when said each narrow band reaches said detector, andanalyzing the output from said detector to estimate a reflectance distribution along a depth profile of the sample.
1 Assignment
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Accused Products
Abstract
The present application in some embodiments relates to methods for reducing noise and/or clutter when measuring a spectrum, particularly but not only for OCT imaging. In some embodiments a light source is synchronized with a detector. For example a narrow band light source is synchronized with a narrow band detector. For example, the light source may scan over multiple frequency bands and/or the detector may be tuned to a frequency band synergetic to the band of the light source. For example the light source and detector may be tuned to overlapping narrow bands. Optionally the detector has a sensor set for each frequency band. Optionally some sensor sets are individually resettable. For example each set may have a reset circuit. For example, a sensor set for a band not currently being measured is deactivated.
13 Citations
25 Claims
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1. A system comprising:
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an adjustable frequency narrow band light source; a beam splitter for dividing light from said light source along a sample and a reference path; an adjustable frequency narrow band detector positioned to receive light from both the sample and the reference paths; and a controller configured for; controlling a frequency and bandwidth of said light source to emit light pulses over time in a succession of narrow frequency bands, synchronizing said detector to said light source by tuning said detector to be sensitive to a respective narrow reception band that overlaps each narrow band of said succession of narrow bands when said each narrow band reaches said detector, and analyzing the output from said detector to estimate a reflectance distribution along a depth profile of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. (canceled)
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11. (canceled)
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12. A method comprising:
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emitting light over a plurality of narrow illumination wave-bands, each narrow illumination wave-band emitted at a specified time and reaching a detector at a corresponding time; dividing said light along a sample path and a reference path; receiving light from both the sample and the reference paths at a detector; synchronizing a frequency sensitivity band of said detector at said corresponding time to overlap said each illumination wave-band at said specified time and analyzing the output from said detector to derive a depth distribution of reflectance of a sample. - View Dependent Claims (14, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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13. (canceled)
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15. (canceled)
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25-50. -50. (canceled)
Specification