Thermally controlled illumination devices

An illuminated surgical instrument, said illuminated surgical instrument comprising:

• a handheld surgical instrument selected from the group consisting of a suction tube and an electrosurgery instrument;
• and
• a non-fiber optic optical waveguide coupled to the handheld surgical instrument, wherein the non-fiber optic optical waveguide comprises:
• a light input section at a proximal portion of the non-fiber optic optical waveguide, wherein the light input section is configured to input light into the non-fiber optic optical waveguide;
• a light transmitting section optically coupled to the light input section, and
• a light output section located distal of the light transmitting section, wherein the light transmitting section is configured to transmit the light from the light input section to the light output section, and
• a conical bore defined by the light output section,
• wherein, in a direction from a distal end of the non-fiber optic optical waveguide toward a proximal end of the non-fiber optic optical waveguide, the conical bore tapers inwardly such that a diameter of the conical bore reduces in size in the direction from the distal end toward the proximal end,
• a plurality of surface features on an inner wall of the conical bore, wherein the plurality of surface features are selected from the group consisting of:
• stair steps, prisms, microstructures, radiused facets, planar facets, and lenslets,
• wherein a first portion of the plurality of surface features extends entirely around a circumference of the conical bore, and a second portion of the plurality of surface features extends only partially around the circumference of the conical bore, and
• wherein at least one of:
• (i) the first portion of the plurality of surface features are positioned distal of the second portion of the plurality of surface features on the conical bore, or
• (ii) each surface feature of the second portion partially extends around the circumference by a respective circumferential distance, and the respective circumferential distances of the second portion of the plurality of surface features decreases in a proximal direction, and
• wherein the distal end of the non-fiber optic optical waveguide is offset proximally from a distal end of the handheld surgical instrument.