Stryker Corporation
ENDOSCOPIC LED LIGHT SOURCE HAVING A FEEDBACK CONTROL SYSTEM

Abstract:

A method for providing light to an endoscope includes emitting light from a plurality of light emitting diodes, filtering the light with a plurality of dichroic filter elements, collimating and mixing light received from the dichroic filter elements into a combined light, sensing the combined light at a color sensor and determining a sensed color balance of the combined light, comparing the sensed color balance with a predetermined color balance, and varying at least one power signal to control a light intensity output by at least one of the plurality of light emitting diodes so that the sensed color balance corresponds to the predetermined color balance.