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US 2026/0294535 A1Published application
Distance measurement during laser lithotripsy procedures
AssigneeLumenis Ltd.
InventorsAmir Finkel, Saman Naser, Asya Mikhaylov, Albert Cogan
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a surgical laser system configured to measure a distance between a distal end of an optical fiber in which laser energy is transmitted and a target where parasitic reflections such as from the distal end and proximal end of the optical fiber are accounted for in measuring the distance.
Claims20
A surgical laser system comprising:
- at least one laser source configured to output an interrogation laser beam, the interrogation laser beam comprising a plurality of wavelength components;
- a reference detector configured to measure an intensity of the interrogation laser beam at each of the plurality of wavelength components;
- at least one signal detector configured to measure an intensity of a reflected light beam at each of the plurality of wavelength components;
- a processor;
- and
- a memory comprising instructions, which when executed by the processor cause the surgical laser system to:
- generate, via one or more of the at least one laser source, an interrogation laser beam, the interrogation laser beam comprising a plurality of wavelength components;
- measure, via the reference detector, an intensity of the interrogation laser beam at each of the wavelength components;
- illuminate, via an optical fiber coupled to the surgical laser system, a target with the interrogation laser beam;
- measure, via the at least one signal detector, an intensity of a reflected light beam at each of the plurality of wavelength components, wherein the reflected light beam comprises target reflections and parasitic reflections;
- derive for each of the measured intensities, a normalized intensity based on the measured intensity and a dark current intensity associated with the measured intensity;
- derive for each of the measured intensities of the reflected light beam, a corrected intensity based on the normalized intensity and one or more parasitic intensities;
- and
- estimate a distance between a distal end of the optical fiber and the target based on the corrected intensities.
11 more elements
At least one non-transitory machine-readable storage device comprising instructions, which when executed by a processor of a surgical laser system cause the surgical laser system to:
- generate, via one or more of laser sources of the surgical laser system, an interrogation laser beam, the interrogation laser beam comprising a plurality of wavelength components;
- measure, via a reference detector of the surgical laser system, an intensity of the interrogation laser beam at each of the wavelength components;
- illuminate, via an optical fiber coupled to the surgical laser system, a target with the interrogation laser beam;
- measure, via at least one signal detector of the surgical laser system, an intensity of a reflected light beam at each of the plurality of wavelength components, wherein the reflected light beam comprises target reflections and parasitic reflections;
- derive for each of the measured intensities, a normalized intensity based on the measured intensity and a dark current intensity associated with the measured intensity;
- derive for each of the measured intensities of the reflected light beam, a corrected intensity based on the normalized intensity and one or more parasitic intensities;
- and
- estimate a distance between a distal end of the optical fiber and the target based on the corrected intensities.
5 more elements
A method for a surgical laser system, comprising:
- generating, via a laser source, an interrogation laser beam, the interrogation laser beam comprising a plurality of wavelength components;
- measuring, via a reference detector, an intensity of the interrogation laser beam at each of the wavelength components;
- illuminating, via an optical fiber coupled to the surgical laser system, a target with the interrogation laser beam;
- measuring, via at least one signal detectors, an intensity of a reflected light beam at each of the plurality of wavelength components, wherein the reflected light beam comprises target reflections and parasitic reflections;
- deriving for each of the measured intensities, a normalized intensity based on the measured intensity and a dark current intensity associated with the measured intensity;
- deriving for each of the measured intensities of the reflected light beam, a corrected intensity based on the normalized intensity and one or more parasitic intensities;
- and
- estimating a distance between a distal end of the optical fiber and the target based on the corrected intensities.
5 more elements
Dependencies are inferred from the claim text.