Electronically scanned coherence tomography with frequency modulated signals
First Claim
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1. An electronics interface for interfacing to a light detector, the electronics interface comprising:
- a tuner having an input coupled to the output of the light detector and an output, the tuner adapted to receive a detector signal from the light detector, the detector signal comprising a plurality of modulation signals, each one of the plurality of modulation frequencies corresponding to a different aspect of an image of body tissue;
an analog-to-digital converter having an input coupled to the output of the tuner and an output; and
a first memory buffer having an input coupled to the output of the analog-to-digital converter and an output.
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Abstract
An improved Optical Coherence Domain Reflectometry (OCDR) system is provided. One embodiment of this OCDR system outputs a detector signal carrying image depth information on multiple modulation frequencies, where each modulation frequency corresponds to a different image depth. The image depth information from the detector signal may be resolved by tuning to the desired modulation frequency. Another system for imaging body tissue uses multiple frequency modulators such that the light beam does not travel from an optical fiber to free space.
41 Citations
26 Claims
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1. An electronics interface for interfacing to a light detector, the electronics interface comprising:
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a tuner having an input coupled to the output of the light detector and an output, the tuner adapted to receive a detector signal from the light detector, the detector signal comprising a plurality of modulation signals, each one of the plurality of modulation frequencies corresponding to a different aspect of an image of body tissue; an analog-to-digital converter having an input coupled to the output of the tuner and an output; and a first memory buffer having an input coupled to the output of the analog-to-digital converter and an output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification