Surgical headlamp
View Patent ↗A surgical headlamp containing lamp housings, each containing multiple LED light sources is featured wherein the LEDs cooperate together to produce a light engine. The lamp housings may be adjusted so that light beams emitted by each LED be selectively converged through a focusing lens at a spot a predetermined distance in front of the lamp housings. Each lamp housing typically contains in addition to the LEDs, one or more focusing lenses to gather and direct the light generated by the LEDs forward to an illuminated work area. Batteries, preferably rechargeable, are mounted in a waist pack external to the headband, and are used to poser the LEDs. A cooling system for cooling the heat generated by the LED's is provided which utilizes a swirling effect of fluid adjacent a heat sink to transfer the heat to the swirling fluid.
1. A headlamp for projecting focused light in a collected beam at a specific distance from the headlamp which is comprised of:
a solid state light source consisting of LEDs producing a semi-coherent distribution of emitted light,
a printed circuit board connecting each LED in series electrical connection,
a focus lens arranged in front of the light source and focusing all emitted light in a substantially circular pattern from said LEDs and at a specific desired distance from the said LEDs' emitted light,
means to provide electrical energy to light each respective LED through the printed circuit board, and
means to cool the respective LEDs to maintain a suitable operating temperature, such means comprising a cooling chamber which includes structural cooling fluid diverters to create a spiral effect of the cooling fluids into a turbulent, swirling motion to effect the transfer of heat from the cooling chamber away from the LEDs.
2. A headlamp according to claim 1 wherein the means to cool includes a reservoir, metallic heat sink layer immediately adjacent each LED, and in contact with the electrical connection, contact to the respective LEDs, and a pump to pass the fluid adjacent the heat sink layer through the swirl and funnel effect located within the cooling chamber.
3. A headlamp according to claim 2 wherein the heat sink layer is between 2.0 mm to 2.5 mm thick, and the printed circuit board is between 1.0 mm to 1.5 mm in thickness.
4. A headlamp according to claim 1 wherein the fluid is pumped at 400 mm per minute to provide the cooling of the LEDs required for optimum performance, but includes the swirling effect to achieve the proper cooling in the cooling chamber.