ANGLE-ADJUSTABLE SURGICAL LAMP Russian patent published in 2011 - IPC A61F9/07 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medical equipment, namely to entrance angle variable surgical lighting systems and to surgical site lighting methods with using thereof. The system comprises a light source, a capped optical cable, an optical fibre functionally coupled with the cap, an optical assembly optically coupled with a distal end of the optical fibre, and a cannula functionally coupled with the cap and optical assembly to enclose and guide the optical assembly for site lighting. In one of the version, the optical assembly consists of a diffuser made of polymer with dispersed liquid crystal ("PDLC") optically coupled with an optical needle; the surgical lighting system comprises a dispersion control system to adjust a degree of light beam dispersion. Under the other version, the optical assembly consists of an embedded combined parabolic concentrating ("CPC") cone. The embedded CPC-cone comprises an enclosed CPC-cone element embedded in an enveloping CPC-cone element; the enclosed CPC-cone element and enveloping CPC-cone are mutually movable relatively to one another. For wide-angle surgical site lighting, the light source generates a light beam emitted from the distal end of the optical fibre through the capped optical cable and supplied on the optical assembly. The optical assembly is guided to light a specified area, and the degree of light beam dispersion emitted from its distal end is adjusted. In a version providing the optical assembly to accommodate the diffuser made of polymer with dispersed liquid crystal ("PDLC"), the degree of light beam dispersion is adjusted electrically by varying voltage supplied on the diffuser. In a version of the optical assembly comprising the embedded combined parabolic concentrating ("CPC") cone, angular beam divergence is controlled by adjusting the approaching the enveloping CPC-cone element relatively to the enclosed CPC-cone element.

EFFECT: using the group of inventions enables optimising the operation observation conditions within a surgical site due to real-time entrance angle adjustment.

25 cl, 8 dwg