LIGHT OUTPUT CALIBRATION IN AN OPTOACOUSTIC SYSTEM

摘要

An optoacoustic system includes first and second light sources capable of generating pulse of light at first and second wavelengths, optical output control, first and second light sync detectors, and a combiner. A power meter that is calibrated to determine power at the first and second predominant wavelength measures power at the first wavelength after the first light sync is detected and measures power at the second wavelength after the second light sync is detected. The system includes a calibration mode wherein it reduces optical output of the first light source when the power measured by the power meter at the first wavelength after the first light sync is detected is above a first level, and reduces optical output of the second light source when the power measured by the power meter at the second wavelength after the second light sync is detected is above a second level.

主权项

1. An apparatus comprising:
first light source capable of generating pulses of light at a first predominant wavelength; second light source capable of generating pulses of light at a second predominant wavelength; optical output control configured to control optical output of the first and second light sources; internal light path comprising:
first and second light sync detectors for the first and second light source, respectively; andcombiner, to direct at least a portion of the pulses of each of the first and second light sources along a common path;common light output connection terminal; external light path connected to the internal light path via the common light output connection terminal, the external light path comprising: plurality of optical fibers having a first end formed into at least one fiber bundle providing an input, and a second end terminating in a handheld probe; power meter calibrated to determine power at the first and second predominant wavelength, the power meter adapted to measure power at the first predominant wavelength after the first light sync is detected, and to measure power at the second predominant wavelength after the second light sync is detected; and the apparatus having a calibration mode wherein the apparatus is adapted to reduce optical output of the first light source when the power measured by the power meter at the first predominant wavelength after the first light sync is detected is above a first level, and to reduce optical output of the second light source when the power measured by the power meter at the second predominant wavelength after the second light sync is detected is above a second level.