A high-efficiency, wide-angle illumination surgical system (12) is disclosed,one embodiment comprising: a light source (12) for providing a light beam； anoptical cable (14) , optically coupled to the light source for receiving and transmittingthe light beam； a handpiece (10) , operably coupled to the optical cable； an opticalfiber (22) , operably coupled to the handpiece, wherein the optical fiber is opticallycoupled to the optical cable to receive and transmit the light beam, an opticalelement (20) , optically coupled to a distal end of the optical fiber, for receivingthe light beam and scattering the light beam to illuminate an area, wherein theoptical element comprises a compound parabolic concentrator ("CPC")cone； and a cannula (16) , operably coupled to the handpiece, for housing and directingthe optical fiber and the optical element. The CPC-cone optical element angularlyspreads the light beam out to a high off-axis angle and emits the light out of thedistal end of the cannula with high efficiency.
